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    19 March 2015, Volume 19 Issue 12 Previous Issue    Next Issue
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    Low-temperature deposition manufacturing and property of polylactic-co-glycolic acid composite scaffolds at different ratios
    Hu Tao, Xu Ming-en, Yan Ming, Guo Miao, Shi Ran, Zhou Qing-qing
    2015, 19 (12):  1805-1811.  doi: 10.3969/j.issn.2095-4344.2015.12.001
    Abstract ( 359 )   PDF (1001KB) ( 933 )   Save

    BACKGROUND: The study confirmed that adding tricalcium phosphate or pearl powder in polylactic-co-glycolic acid can complement the performance of both, which provides a good environment for cells and makes a faster and better growth of cells.
    OBJECTIVE: We used polylactic-co-glycolic acid as matrix, composited with pearl powder or tricalcium phosphate to prepare scaffolds by low-temperature deposition manufacturing.
    METHODS: Low-temperature deposition manufacturing was utilized to prepare composite scaffold of polylactic-co-glycolic acid/pearl powder or polylactic-co-glycolic acid/tricalcium phosphate at the ratio of 10:0, 5:2, 7:3 and 6:4. Microstructure, contact angle and compression modulus of elasticity of scaffolds were detected. MC3T3-E1 cells basically fused at 1×104/cm3 were seeded in the pure nonporous polylactic-co-glycolic acid scaffold, pure polylactic-co-glycolic acid scaffold with holes, polylactic-co-glycolic acid/pearl powder at 5:2 and polylactic-co-glycolic acid/tricalcium phosphate at 5:2 separately for 1 and 3 hours. Cell adhesion rate was detected using flow cytometry. After incubation for 1, 4 and 7 days, cell proliferation was measured using Alamar Blue method. 
    RESULTS AND CONCLUSION: Pure polylactic-co-glycolic acid scaffold had cross-linked microporous structure, with pore size of 3-15 μm. Scaffolds of polylactic-co-glycolic acid/pearl powder at 5:2 or polylactic-co-glycolic acid/tricalcium phosphate at 5:2 had good continuous porous structure, with pore size of 10-25 μm. With increased content of pearl powder or tricalcium phosphate, the hydrophilicity of the composite scaffold increased. The addition of pearl powder or tricalcium phosphate could elevate compressive mechanical properties of the composite scaffold. With increased content, the mechanical property of the scaffold enhanced and then reduced. The addition of pearl powder or tricalcium phosphate improved the cellular affinity of polylactic-co-glycolic acid and the biocompatibility of the scaffold. The biocompatibility of polylactic-co-glycolic acid/pearl powder scaffold at 5:2 was the best.


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    Stainless steel locking plate implantation for fractures of the proximal humerus: restoration of joint function and incidence of adverse events
    Zhou Xue-feng, Zhou Jia-ning, Ma Hua-song, Bai Ke-wen, Peng Jun, Bao Lei, Wang Meng, Ma Xiao-ming, Lu Ming
    2015, 19 (12):  1812-1816.  doi: 10.3969/j.issn.2095-4344.2015.12.002
    Abstract ( 394 )   PDF (819KB) ( 677 )   Save

    BACKGROUND: During ordinary plate fixation, the soft tissues around the fracture of the proximal humerus are nearly stripped to impact blood supply, and moreover, an ordinary steel plate cannot meet with the fixed requirements for severe osteoporosis, large bone defects and comminuted fractures.
    OBJECTIVE: To observe the functional recovery and complications in middle-aged patients with proximal humeral fractures undergoing stainless steel locking plate implantation.
    METHODS: From March 2011 to March 2014, 48 patients with proximal humeral fractures were treated in the 306th Hospital of PLA, including 20 males and 28 females, with an average age of 58 years. Of the 48 cases, there were 9 cases of Neer 2 fractures, 26 cases of Neer 3 fractures, and 13 cases of Neer 4 cases, all of which belonged to closed injuries. All the patients were subject to locking plate implantation for repair of fractures of the proximal humerus, and evaluated based on Neer scores.
    RESULTS AND CONCLUSION: The 48 patients were followed up for 6-17 years, and the mean healing time was (15.3±1.2) weeks. At the last follow-up, the Neer scores were excellent in 12 cases, good in 22 cases, fair in 11 cases and poor in 3 cases, with an excellent-good rate of 71%. After internal fixation, there was one case of  soft tissue infection, two cases of traumatic arthritis, and no bone ununion and osteomyelitis. These findings suggest that the stainless steel locking plate implantation for repair of fractures of the proximal humerus can achieve a good anatomic reduction under minimally invasive conditions and produce a stable rehabilitation environment for the soft tissue around the shoulder joint by internal fixation. Hence, the factures can recover faster with less complications. The stainless steel locking plate implantation can obtain good achievements in the repair of proximal humeral fractures of Neer 2, 3 as well as Neer 4 in young patients with good bone quality.


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    Therapies for early avascular necrosis of the femoral head: core decompression with quadratus femoris implantation is better than core decompression with bone paste implantation
    Meng Fei, Wang Jue, Qiu Ru-biao, Yuan Lian-jing, Tang Qian
    2015, 19 (12):  1817-1821.  doi: 10.3969/j.issn.2095-4344.2015.12.003
    Abstract ( 440 )   PDF (661KB) ( 471 )   Save

    BACKGROUND: Core decompression may provide insufficient support for the subchondral bone in the treatment of early avascular necrosis of the femoral head and increase the risk of fracture and collapse. Quadratus femoris implantation cannot only provide good biological support, but also promote the revascularization at necrotic regions, thus repairing the necrosis of femoral head. 
    OBJECTIVE: To compare the clinical effects of core decompression with bone paste implantation and core decompression with quadratus femoris implantation on early and middle-stage avascular necrosis of the femoral head.
    METHODS: Eighty-three patients with early avascular necrosis of the femoral head (92 hips) admitted at the Department of Orthopedics, the First Affiliated Hospital of Zhengzhou University, China, from January 2009 to January 2012 were enrolled and divided into groups of core decompression with bone paste implantation (46 cases, 49 hips) and core decompression with quadratus femoris implantation (37 cases, 43 hips) that were respectively injected with bone meal and autogenous bone and osteoinductive materials.
    RESULTS AND CONCLUSION: All involved patients were followed up. After 1 year of treatment, Harris scores in the two groups were both increased (P < 0.05). But the Harris score of core decompression with bone paste implantation group was lower than that of core decompression with quadratus femoris implantation group (P < 0.05). After 3 years of treatment, X-ray scores in the core decompression with quadratus femoris implantation group were significantly higher than those in the core decompression with bone paste implantation group (P < 0.05). These findings indicate that compared with core decompression with bone paste implantation, core decompression with quadratus femoris implantation is better to prevent femoral head collapse, improve hip function and delay the process of osteonecrosis of the femoral head.


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    Percutaneous vertebroplasty in the treatment of vertebral hemangioma: bone cement operation
    Li Zu-guo, Tong Wei-hua, Liu Hao, Wu Ji-guang, Hu Zuo-hong
    2015, 19 (12):  1822-1826.  doi: 10.3969/j.issn.2095-4344.2015.12.004
    Abstract ( 409 )   PDF (769KB) ( 491 )   Save

    BACKGROUND: Increasing studies have found that, percutaneous vertebroplasty and bone cement are characterized by few traumas, few bleeding, simple operation, rapid recovery, rapid pain relief, and effective efficacy. However, tumor recurrence, symptom improvement, bone cement leakage and other complications make people controversial.
    OBJECTIVE: To explore and summarize clinical outcomes and safety of percutaneous vertebroplasty and bone cement for treating symptomatic vertebral hemangioma.
    METHODS: Fifty-two cases patients of symptomatic vertebral hemangioma (including 21 male and 31 female, aged 16-63 years) were treated with percutaneous vertebroplasty and bone cement. The lesions were found at T5-T12 in 36 cases and at L1-L3 in 16 cases. Clinical outcomes such as Visual Analogue Scale, Oswestry Disability Index and modified Macnab criteria, as well as complication before and after surgery were evaluated.
    RESULTS AND CONCLUSION: All 52 patients were followed up for at least 6 months after the operation. The Visual Analogue Scale and Oswestry Disability Index were significantly increased at 1 day, 3 weeks and 6 months post-surgery, when compared to before surgery (P < 0.05); the modified Macnab evaluation was excellent in 40 cases, good in 7 cases, fair in 3 cases, and poor in 2 cases, and the excellent and good rate was 90%. Only one patient had recurrence at 6 months after surgery and one patient had the leakage of bone cement. No other complications were found. Percutaneous vertebroplasty and bone cement could effectively cure vertebral hemangioma and relieve the pain, which is a safe treatment.


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    Shaping ability of rotary nickel-titanium Mtwo versus K3 in severely curved root canals
    Wang Li-na, Liu Qi-cheng, Fu Kang-gui, Shi Chun, Niu Wei-dong
    2015, 19 (12):  1827-1831.  doi: 10.3969/j.issn.2095-4344.2015.12.005
    Abstract ( 386 )   PDF (673KB) ( 1039 )   Save

    BACKGROUND: Severely curved root canal preparation is the difficulty during clinical root canal preparation, and improper preparation may induce complications such as stage, root canal offset and apical open, which affect the quality of root canal preparation and apical closure. Therefore, it is important to choose a root canal preparation instrument which has the best cutting and forming ability.
    OBJECTIVE: To compare the shaping ability of Mtwo nickel-titanium rotary instruments, K3 nickel-titanium rotary instruments and stainless steel K-files for the preparation of curved root canals.
    METHODS: A total of 30 severely curved root canals of freshly extracted human maxillary molars were randomly divided into three groups, with 10 canals in each group. The canals were prepared by Mtwo instruments, K3 instruments and K-files, respectively. The instrument’s tip location in pre- and post-instrumentation radiographs of the three groups was recorded; the changes of root curvature, working length and working time in the three groups were measured and compared.
    RESULTS AND CONCLUSION: The root curvature showed no significant difference in the three groups before preparation (P > 0.05). The changes of root curvature after root preparation in Mtwo instrument and K3 instrument groups were significantly less than that in K-files group (P < 0.01), and no significant difference was found between Mtwo instrument group and K3 instrument group (P > 0.05). The root canal preparation time in the three groups showed significant differences (P < 0.01), which was the shortest in Mtwo instrument group and the longest in K-files group. The changes of working length after root preparation in the three groups showed no significant difference (P > 0.05). Mtwo nickel-titanium rotary instruments and K3 nickel-titanium rotary instruments are have high efficacy and strong shaping ability in preparing curved root canals.


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    Influence of three types of toothbrushes on enamel decalcification in orthodontic patients: a comparative study
    Huang Xue-hua, He Ke
    2015, 19 (12):  1832-1836.  doi: 10.3969/j.issn.2095-4344.2015.12.006
    Abstract ( 363 )   PDF (523KB) ( 531 )   Save

    BACKGROUND: A number of studies have been conducted on the prevention of enamel demineralization in orthodontic treatment, but no work has been carried out on the comparative studies addressing manual toothbrush, orthodontic fur V brush and interdental brush.
    OBJECTIVE: To compare the efficacy of manual toothbrush, orthodontic fur V brush and interdental brush on enamel decalcification during orthodontic treatment.
    METHODS: Adolescents, aged 12 to 17 years old, were randomly and averagely divided into three groups: manual toothbrush, orthodontic fur V brush, and interdental brush groups. Enamel decalcification index and augmenter of enamel decalcification index were examined and calculated by the same orthodontist before treatment and 1 year later.
    RESULTS AND CONCLUSION: There was no statistical difference in the enamel decalcification index among the three groups at the beginning (P > 0.05). After 1 year of treatment, the enamel decalcification index of each group was higher than that at the beginning (P < 0.05); the enamel decalcification index and augmenter of enamel decalcification index in the three groups were ranked as follows: orthodontic Fur V toothbrush group < manual toothbrush < interdental toothbrush group , and there was a statistical significant difference among the three groups (P < 0.05). Orthodontic fur V brush is proved to have advantages over manual toothbrush and interdental brush in the respect of controlling enamel decalcification, and interdental brush has no good effect on preventing enamel demineralization while it is used alone.


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    Primary stability of mini-screw: buccal cortical thickness in maxillary posterior area of malocclusion
    Zou Shuang-shuang, Lei Yong-hua, Zhang Ya-mei, Liu Lu
    2015, 19 (12):  1837-1841.  doi: 10.3969/j.issn.2095-4344.2015.12.007
    Abstract ( 345 )   PDF (627KB) ( 614 )   Save

    BACKGROUND: Mini-screw stability is primarily related to alveolar bone cortical thickness. It is necessary to learn cortical thickness to choose suitable implanting sites and predict success rate.
    OBJECTIVE: To evaluate the buccal cortical thickness in maxillary posterior area of Class II Division I malocclusion adolescents.
    METHODS: Fifty-two adolescents (including 26 male and 26 female) of Class II Division I malocclusion scanned by Cone Beam Computer Tomography were involved in this study. The buccal cortical thickness of six posterior interradicular sites (14-15, 15-16, 16-17, 24-25, 25-26, 26-27) at four bone levels (2, 4, 6, 8 mm) from the 
    alveolar crest in both boys and girls were measured.
    RESULTS AND CONCLUSION: (1) There was no statistically significant difference in alveolar cortical thickness between left and right sides in the girls (P > 0.05); cortical thickness of 5-6 and 6-7 at 8 mm was thicker than that at 2 mm (P < 0.05) and cortical thickness of 6-7 at 2 mm was smaller than that at 8 mm (P < 0.05). The cortical thickness increased from crest to base of alveolar crest and reached the peak at 8 mm. Cortical thickness of 6-7 was thicker than 4-5 at 8 mm depth (P < 0.05). The results of males were the same as females. (2) There was no statistically significant difference in alveolar cortical thickness of the same site between males and females (P > 0.05). All sites in this study were suitable for mini-screw implantation; from the first molar to posterior dental arch, buccal cortical thickness is well-distributed; it is dangerous for implantation in the areas around the first molar more than 6 mm, where the frequent presence of the maxillary sinus is observed. There is an increase of buccal cortical thickness from crest to base of alveolar crest, obtaining good initial stability.


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    Biomechanical difference between Twin-Block appliance and straight wire appliance in the early treatment of Class II division 1 malocclusion
    Jin Zhao-hui, Liu Wen-hui
    2015, 19 (12):  1842-1845.  doi: 10.3969/j.issn.2095-4344.2015.12.008
    Abstract ( 441 )   PDF (569KB) ( 1581 )   Save

    BACKGROUND: Class II malocclusion is commonly observed in clinics, with the main manifestation of skeletal malocclusion, and mandibular retrusion is the main reason. Class II malocclusion should be treated early to correct skeletal malformation and improve facial appearance.
    OBJECTIVE: To compare the biomechanics change in early treatment of Class II division 1 malocclusion with Twin-Block appliance and straight wire appliance combined with face-bow and Class II drawing.
    METHODS: Thirty patients with malocclusion who were at peak velocity on the growth curve were randomly divided into two groups, with 15 cases in each group. Patients in each group were treated with Twin-Block appliance and straight wire appliance combined face-bow and Class II drawing, respectively. The cephalometric records of all patients were examined before and after the treatments. The acquired data were processed by statistical analysis.
    RESULTS AND CONCLUSION: After treatment, all molars and cuspid teeth achieved or reached Class I, and ANB angle decreased to normal range. The bone effect of Twin-Block appliance was more significant than straight wire appliance. Using Twin-Block appliance, the length of mandible body and lower face height increased significantly. Experimental findings indicate that, Twin-Block appliance has significant therapeutic effects in treatment of early skeletal Class II division 1 malocclusion patients, who are at peak velocity on the growth curve. With the biomechanical effects, this treatment corrects asymmetrical jaw relation, reconstructs the tissue, and obtains satisfactory lateral facial profile of soft tissues. The therapeutic effect is more obvious for patients with obvious mandibular retrusion, flared upper incisors and upright lower incisors.


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    In vitro cytocompatibility of biomedical (Y0.95Eu0.05)2O3 nanomaterials
    Shuai Meng-qi, Zhu Wen-lu, Wang You-fa
    2015, 19 (12):  1846-1851.  doi: 10.3969/j.issn.2095-4344.2015.12.009
    Abstract ( 294 )   PDF (850KB) ( 729 )   Save

    BACKGROUND: Compared with organic fluorescent dyes and fluorescent proteins, rare earth nanomaterials have higher sensitivity, better optical stability, and lower cytotoxicity.

    OBJECTIVE: To investigate the in vitro cytocompatibility of (Y0.95Eu0.05)2O3 rare earth nanomaterial and the effect of amine functionalization on the material cytocompatibility.
    METHODS:(Y0.95Eu0.05)2O3 nanomaterials were synthesized using sol-gel method, and underwent amine functionalization. Amine-functionalized samples (10, 25, 50, 100, 200 mg/L) and non-amine-functionalized (Y0.95Eu0.05)2O3 rare earth nanomaterial suspensions were co-cultured with vascular smooth muscle cells of Sprague-Dawley rats for 3 days. Cell proliferation was detected using Cell Counting Kit-8 assay. 100 mg/L amine-functionalized samples and non-amine-functionalized (Y0.95Eu0.05)2O3 rare earth nanomaterial suspensions were co-cultured with L929 cells for 48 hours. Cell apoptosis was observed using fluorescence staining.

    RESULTS AND CONCLUSION: With increased mass concentration of material suspension, survival rate of vascular smooth muscle cells was gradually reduced. At the mass concentration of 10, 25, 50 mg/L, cell survival rate was significantly higher in the amine-functionalized group than in the non-amine-functionalized group (P < 0.05). When the mass concentration of materials reached 200 mg/L, the cell survival rate decreased to 76% in the non-amine-functionalized group, but it was still above 80% in the amine-functionalized group, showing significant differences between the two groups (P < 0.05). The growth of L929 cells was good and the number of apoptotic cells was less in the amine-functionalized group. Cells were sparse and the number of cell apoptosis was more in the non-amine-functionalized group, showing slight cytotoxicity. These data verified that amine-functionalization can improve cytocompatibility of (Y0.95Eu0.05)2O3 rare earth nanomaterial.


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    Nano-hydroxyapatite film as a support to improve the proliferation of human umbilical vein endothelial cells
    Cheng Guang-cun, Yan Zhong-ya, Li Chun-sheng, Yan Yu, Wei Xiao-yong
    2015, 19 (12):  1852-1857.  doi: 10.3969/j.issn.2095-4344.2015.12.010
    Abstract ( 405 )   PDF (2502KB) ( 505 )   Save

    BACKGROUND: A new type of nano-hydroxyapatite artificial mechanical heart valve has been developed using pulsed laser deposition technology at the Department of Materials, Hefei University and Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, China. 
    OBJECTIVE: To investigate the compatibility of nano-hydroxyapatite artificial mechanical heart valve with human umbilical vein endothelial cells.
    METHODS: Human umbilical vein endothelial cells were in vitro isolated, cultured and passaged to the 2-4 generations, and then the cell suspension was inoculated onto the nano-hydroxyapatite artificial mechanical heart valve. After 3, 7, 12 days of culture, the cell growth on the artificial mechanical heart valve was observed under scanning electron microscope. In addition, the human umbilical vein endothelial cells were respectively cultured in room-temperature and high-temperature extract liquids of nano-hydroxyapatite artificial mechanical heart valve, high-density polyethylene and phenol solution extracts for 72 hours, and then, the proliferation of cells was detected by MTT method.
    RESULTS AND CONCLUSION: Under the scanning electron microscope, the human umbilical vein endothelial cells were fusiform- or polygon-shaped with protuberances adhered to the artificial mechanical heart value at 3 days of culture; the cells were stretched thoroughly and fused at 7 days of culture; and the cells were confluent to pieces that tightly overlaid the heart valve surface and the extracellular matrix was formed locally at 21 days of culture. Results from MTT test displayed that the nano-hydroxyapatite artificial mechanical heart valve had no cytotoxicity to the human umbilical vein endothelial cells, indicating a good cytocompatibility.


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    Chitosan improves the crystallization of silk fibroin: a three-dimensional scaffold material with better mechanical stability
    Zhang Xia-zhi, Situ Fang-min, Peng Peng, Jiao Yan-peng
    2015, 19 (12):  1858-1863.  doi: 10.3969/j.issn.2095-4344.2015.12.011
    Abstract ( 538 )   PDF (2334KB) ( 559 )   Save

    BACKGROUND: Silk fibroin as natural biological macromolecules has good biocompatibility, but it is difficult to make the three-dimensional scaffold with uniform structure because of its higher crystallization performance and bigger brittleness.
    OBJECTIVE: To improve the crystallization of silk fibroin through the addition of chitosan, and to get three-dimensional tissue engineering scaffolds with better mechanical strength.
    METHODS: CaCl2/CH3CH2OH/H2O ternary solution was used to dissolve silkworm cocoon to extract silk fibroin and form solution. Silk fibroin solution and chitosan solution were mixed according to different mixing ratios of 2:1, 1:1, 1:2, respectively, and then porous silk protein/chitosan scaffolds were prepared by freeze-drying method and treated by methanol. Scaffold morphology was observed by scanning electron microscopy, the chemical structure and crystalline state of the scaffolds were characterized through infrared spectrum and X-ray diffraction test, respectively. Also, the porosity and water uptake were tested and periodic cycle compression mechanical properties under the water environment were determined.
    RESULTS AND CONCLUSION: The introduction of chitosan could improve the properties of scaffolds. The porosity of the composite scaffold with lower porosity was more uniform and orderly with higher content of chitosan. When the mixture rate of chitosan and silk fibroin was 1:2, the water uptake rate was the highest in the composite scaffolds, and also higher than that of the silk fibroin scaffold but lower than that of the chitosan scaffold. With the increase of silk fibroin, the composite scaffolds had better elasticity and stronger ability to maintain the shape.


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    Nano-collagen artificial bone for alveolar ridge preservation in the Kazakh from Xinjiang Tacheng Region
    Wang Cheng-yue, Zhao Yuan, Yang Man, Wang Shu-feng
    2015, 19 (12):  1864-1871.  doi: 10.3969/j.issn.2095-4344.2015.12.012
    Abstract ( 355 )   PDF (1102KB) ( 1084 )   Save

    BACKGROUND: It is an important issue of alveolar ridge preservation after tooth extraction. Because of the limited treatment and geographical conditions, lack of awareness of oral health, many local people in frontier areas in Xinjiang have poor alveolar ridge that is not of timely repair after tooth extraction. Thus, it is important to find a suitable local and efficient way to save the residual ridge, which has a more practical clinical value.
    OBJECTIVE: To investigate the feasibility of nano-collagen artificial bone used for alveolar ridge preservation in the Kazakh in Xinjiang Tacheng Region, China.
    METHODS: Sixty-eight Kazakh patients with bilateral extraction from Tacheng region, Xingjiang Uygur Autonomous Region, China were selected in a self-controlled trial. According to the principle of a minimum allocation imbalance index, the experimental side and control side of extraction patients were confirmed. In the experimental side, nano-collagen artificial bone was implanted; while, conventional treatment was done in the control side. Multi-slice spiral CT was used to scan the regions of extraction interest to measure the relative gray value of alveolar bone mineral density immediately and 3 months after implantation.
    RESULTS AND CONCLUSION: Immediately after implantation, tooth extraction sockets were visible on CT images both in the experimental and control sides; but after 3 months, the extraction sockets became unclear on the CT images, and CT values were close to those of the surrounding alveolar process, but bone tissues were full of the bone graft area in the experimental side. The alveolar bone mineral density was higher in the experimental side than the control side at 3 months after implantation. These findings indicate that the nano-collagen artificial bone has good clinical achievement in alveolar ridge preservation in the Kazakh in Xinjiang Tacheng Region.


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    Microporous polysaccharide hemospheres reduce blood loss in total hip arthroplasty
    Liu Tian-sheng, Wang Qi, Wang Hao, Liu Ai-peng, Ma Jin-chao
    2015, 19 (12):  1872-1877.  doi: 10.3969/j.issn.2095-4344.2015.12.013
    Abstract ( 507 )   PDF (813KB) ( 699 )   Save

    BACKGROUND: In foreign animal experiments and clinical reports, microporous polysaccharide hemospheres are characterized as good hemostatic effect, no delayed bleeding, good biocompatibility, and no adverse reactions in the body.
    OBJECTIVE: To assess the efficacy and safety of microporous polysaccharide hemospheres on reducing blood loss after unilateral total hip arthroplasty.
    METHODS: Totally 98 patients who received unilateral total hip arthroplasty due to femoral neck fractures, 39 males and 59 females, aged 61-77 years, were randomly divided into two groups: test group, treated with 1g microporous polysaccharide hemospheres before suture of wound; control group, treated with electric coagulation hemostasis before suturing. Drainage tubes were placed in the two groups. Hemoglobin, blood loss, allogeneic transfusion rate, drainage volume, coagulation index and incidence of deep venous thrombosis of the lower limbs were compared.
    RESULTS AND CONCLUSION: The total blood loss, drainage volume, and transfusion rate in the test group were significantly lower than those in the control group (P < 0.01), but there were no differences in D-dimer, platelet count, activated partial thromboplastin time and international normalized ratio between the two groups. One case of each group developed deep venous thrombosis of the lower limbs, and no significant difference was in the incidence of deep venous thrombosis between the two groups. No infection occurred. These findings indicate that microporous polysaccharide hemospheres that are safe, effective and convenient can reduce the visible and hidden blood loss after unilateral total hip arthroplasty.


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    Short-term prognostic implication for patients with ST-elevation myocardial infarction undergoing domestic rapamycin drug-eluting stent implantation
    Jia Ming-li
    2015, 19 (12):  1878-1883.  doi: 10.3969/j.issn.2095-4344.2015.12.014
    Abstract ( 437 )   PDF (726KB) ( 512 )   Save

    BACKGROUND: Coronary drug-eluting stent implantation is the best treatment for acute ST-segment elevation myocardial infarction, but because of many combined risk factors in elderly patients, the mortality rate is increased with aging.
    OBJECTIVE: To analyze whether age differences is a significant independent predictor of in-hospital clinical outcomes in patients with acute ST-elevation myocardial infarction treated with domestic rapamycin drug-eluting stent implantation.
    METHODS: A retrospective analysis was done in 307 patients with first acute ST-elevation myocardial infarction treated with emergent rapamycin drug-eluting stent implantation for primary percutaneous coronary intervention. According to the age, there were three groups: non-elderly group (< 65 years old, n=175), low-elderly group (65-74 years old, n=83), and high-elderly group (≥ 75 years old, n=49). Clinical features, mortality, cardiac events during in-hospital stay were compared among three groups.
    RESULTS AND CONCLUSION: Compared with the non-elderly group, the proportion of female patients and the history of hypertension were higher in the low-elderly or high-elderly group (P < 0.05). The history of smoking was higher in the non-elderly group than the other groups (P < 0.05). The incidences of Killip classification≥II,  three-lesion or left main coronary artery disease were higher in the high-elderly group than the other groups (P < 0.05). Hemoglobin, total cholesterol, triglycerides, low-density lipoprotein, and cholesterol levels were higher in the non-elderly group than the other groups (P < 0.05). Serum creatinine level, incidence of malignant arrhythmia and incidence of in-hospital cardiac death were increased with aging. Successful reperfusion was higher in the high-elderly group than in the low-elderly or non-elderly group. Rate of acute heart failure and combined cardiovascular events were higher in the high-elderly group than in the low-elderly or non-elderly group (P < 0.05). Multivariate logistic regression analysis show that age is an independent risk factor for in-hospital mortality in patients with acute ST-elevation myocardial infarction treated with rapamycin drug-eluting stent implantation.


    中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


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    Comparison of different anchoring techniques for intracoronary delivering of   drug-eluting stents to target lesions
    Chen Xin-jing
    2015, 19 (12):  1884-1888.  doi: 10.3969/j.issn.2095-4344.2015.12.015
    Abstract ( 301 )   PDF (596KB) ( 456 )   Save

    BACKGROUND: Both distal-wire anchoring technique and branch-balloon anchoring technique are the effective ways of improving the ability to deliver stents to the target lesions. There is no study addressing the comparison of these two techniques in the successful stent delivery to stenosis lesions at present.
    OBJECTIVE: To evaluate the clinical effect of distal-wire anchoring technique versus branch-balloon anchoring technique in delivering stents to complex lesions.
    METHODS: We retrospectively analyzed the clinical data of 87 cases of difficultly delivering stents in the process of coronary intervention, in which 46 cases were treated with branch-balloon anchoring technique and 41 cases treated with distal-wire anchoring technique. Then, stent implantation rate, major adverse cardiac reactions and recurrence of angina pectoris within 12 months, and late lumen loss, restenosis after stent implantation were compared between the two groups.
    RESULTS AND CONCLUSION: The successful stenting rate of distal-wire anchoring technique group was significantly higher than that of branch-balloon anchoring technique group (83% vs. 61%, P < 0.05). There were no significant differences between two groups patients in complications during stenting, major adverse cardiac reactions and recurrence of angina pectoris within 12 months, and late lumen loss, restenosis after stent implantation. The study indicates that the distal-wire anchoring technique is of safety and effectiveness method for dealing with inability to deliver stents to the target lesions.


    中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


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    Medical polyethylene glycol berberine via shoulder joint injections for the treatment of subacromial impingement syndrome: a follow-up of 6 months
    Wang Li-qin, Pan Suo-hua, Chen Yue-ying, Wu Jun
    2015, 19 (12):  1889-1893.  doi: 10.3969/j.issn.2095-4344.2015.12.016
    Abstract ( 412 )   PDF (752KB) ( 568 )   Save

    BACKGROUND: Medical polyethylene glycol berberine is a biomaterial against tissue adhesion, with anti-inflammatory effects, which can prevent scar formation and reduce local inflammation.
    OBJECTIVE: To observe the clinical efficacy of medical polyethylene glycol berberine via shoulder joint injections on subacromial impingement syndrome.
    METHODS: Forty patients with subacromial impingement syndrome I, II were voluntarily divided into two groups: biomaterial group (n=20), single intra-articular injection of 3 mL medical polyethylene glycol berberine; conservative treatment group (n=20), single subacromial space closed treatment of betamethasone combined with lidocaine hydrochloride followed by oral administration of celecoxib 200 mg once, twice a day, totally for 1 week. Patients were followed up clinically for visual analog scale scores, range of motion of the shoulder and the American Shoulder and Elbow Surgeons scores.
    RESULTS AND CONCLUSION: Both of two groups had a great improvement in visual analog scale scores, range of motion of the shoulder and the American Shoulder and Elbow Surgeons scores after treatment(P < 0.05), and these scores were improved more significantly in the biomaterial group than the conservative treatment group at 2 weeks, 4 weeks, 3 months, 6 months after treatment (P < 0.001). These findings indicate that the intra-articular injection of medical polyethylene glycol berberine for subacromial impingement syndrome  can effectively alleviate shoulder pain, improve shoulder mobility, and promote functional recovery of the shoulder.


    中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


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    Endoscopic histoacryl injection combined with ligation in the treatment of severe esophageal and gastric varices
    Cai Jin-wei, Zhou Ying-sheng
    2015, 19 (12):  1894-1898.  doi: 10.3969/j.issn.2095-4344.2015.12.017
    Abstract ( 491 )   PDF (682KB) ( 655 )   Save

    BACKGROUND: As a commonly used tissue adhesive in China, histoacryl can produce transient polymerization and rapidly solidify biological tissue, and it has good prospect in treatment of esophageal and gastric varicose bleeding.
    OBJECTIVE: To explore the short- and long-term clinical efficacy of endoscopic histoacryl injection combined with ligation for the treatment of esophageal and gastric varices.
    METHODS: Ninety patients with esophageal and gastric varices were treated by endoscopic adhesive injection and dense ligation. There were 64 males and 26 females, aged 22-75 years. At 2-4 weeks post-treatment, patients were re-checked under an endoscope. The short-term efficacy and adverse reactions, such as the hemostasis rate, varicose vein, varicose vein diameter, red color sign and portal hypertension gastropathy were observed. All patients were followed up for 3-39 months after varicose vein was eradicated, to monitor the middle- and long-term clinical efficacy, including varicose vein, tissue adhesive discharging and local proliferation, rebleeding, recurrence and complications.
    RESULTS AND CONCLUSION: (1) Short-term efficacy: The number of varicose veins significantly reduced, red color signs reduced, and portal hypertension gastropathy improved (P < 0.01), but three cases appeared early rebleeding. The adhesives began to discharge from 2 weeks to 3 months post-treatment, no case appeared esophageal stenosis, perforation, severe infection, heterotopic embolism and other injection-related complication. (2) Middle- and long-term efficacy: varicose vein recurred in nine cases and five cases developed long-term rebleeding. Experimental findings indicate that, endoscopic histoacryl injection combined with ligation is effective to treat severe esophageal varices or (and) bleeding, with high success rate and good hemostasis effect, and it also prevents long-term rebleeding and recurrence.


    中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


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    Improved pelvic floor reconstruction with polypropylene mesh for repair of pelvic organ prolapse
    Xie Hong, Huang Hai-wei, Ma Xin, Zhao Fang, Zhang Lin
    2015, 19 (12):  1899-1903.  doi: 10.3969/j.issn.2095-4344.2015.12.018
    Abstract ( 538 )   PDF (725KB) ( 1195 )   Save

    BACKGROUND: Synthetic patch as an important substitute to pelvic tissue can replace damaged pelvic fascia tissue, and has been widely used in the pelvic floor reconstruction.
    OBJECTIVE: To observe the efficacy and complications of pelvic floor reconstruction with mesh, and to explore its safety and effectiveness.
    METHODS: Forty-five pelvic organ prolapse female patients were divided into two groups according to patient’s willingness: experimental group, pelvic floor reconstruction with mesh (n=25); control group, transvaginal hysterectomy combined with vaginal wall repair (n=20). Perioperative conditions were recorded, and uterine prolapse staging, complications, pelvic floor function, pelvic discomfort, as well as an objective cure rate were evaluated in the two groups during the follow-up.
    RESULTS AND CONCLUSION: Compared with the control group, the experimental group was characterized as shorter operative time, less amount of bleeding, milder infections, and faster recovery (All P < 0.05). At 6 months of follow-up, the score on uterine prolapse staging was higher in the experimental group than the control group; at 12 months, the scores on pelvic floor function and pelvic discomfort as well as the incidence of complications were significantly lower in the experimental group (P < 0.05), but the objective cure rate was higher compared with the control group (P < 0.05). These findings suggest that pelvic floor reconstruction with mesh for pelvic organ prolapsed can reduce the operative time and blood loss and promote postoperative recovery. Meanwhile, it can significantly improve pelvic floor function, pelvic discomfort, postoperative complications, the rate of exposure, and the objective cure rate, which is safe and effective during the short-term follow-up.


    中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


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    Silicone materials for breast augmentation influence the state of human oral mucosa cells
    Ding Yan-mei
    2015, 19 (12):  1904-1908.  doi: 10.3969/j.issn.2095-4344.2015.12.019
    Abstract ( 367 )   PDF (705KB) ( 528 )   Save

    BACKGROUND: Previous studies have shown that the survival state of oral mucosal cells directly is directly affected by the nutritional status of the body, therefore, it may be a good indicator of the surgical nutritional status. But whether this index also influences surgical trauma stimulus is still unclear.
    OBJECTIVE: To observe the effect of breast augmentation with silicone implants on the survival status of oral mucosal cells.
    METHODS: Thirty-two female patients scheduled for breast augmentation with silicone implants, including 13 cases of reproductive history and 19 cases of non-reproductive history, aged 23-45 years old. Sub-G1 peak method and Ki-67 were used to detect the proliferation and apoptosis rates of oral mucosa cells before and after breast augmentation with silicone implants for statistical comparisons.
    RESULTS AND CONCLUSION: All the 32 cases successfully completed breast augmentation with silicone implants, and no serious adverse events occurred perioperatively. The oral mucosa cell apoptosis and proliferation rates were (27.3±6.2)% and (27.8±5.8)% before breast augmentation, and (27.8±5.8)% and (20.2±7.7)% after breast augmentation. There was no difference before and after breast augmentation (P > 0.05). These findings indicate that the proliferation and apoptosis of human oral mucosa cells cannot be significantly by breast augmentation-related trauma, and the survival state of oral mucosa cells has some value to assess the nutritional state of breast augmentation recipients.


    中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


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    Biocompatibility of carbon fiber interbody fusion cage versus titanium mesh cage in treatment of lumbar disc degeneration
    Song Cheng-zhe, Jin Hong-xu
    2015, 19 (12):  1909-1913.  doi: 10.3969/j.issn.2095-4344.2015.12.020
    Abstract ( 396 )   PDF (736KB) ( 750 )   Save

    BACKGROUND: The endplate can be combined closely with different intervertebral fusion cages through the pedicle screw internal fixation system, to provide a more reliable spine stability for reconstruction of intervertebral height, lumbar physiological curvature and biomechanical function.
    OBJECTIVE: To compare the effectiveness of carbon fiber interbody fusion cage and titanium mesh cage in lumbar disc degeneration.
    METHODS: Sixty patients with L3-S1 lumbar disc degeneration who underwent posterior lumbar interbody fusion, 33 males and 27 females, were randomized into carbon fiber interbody fusion cage group and titanium mesh cage group. Japanese Orthopaedic Association Scores were compared between the two groups before and after the implantation, as well as the intervertebral height, intervertebral fusion and complications.
    RESULTS AND CONCLUSION: Sixty patients completed the 3-27 months follow-up, and had good bone fusion. Lumbar activity was normal in all the patients at 3 months after treatment. The Japanese Orthopaedic Association Scores at 3 months after implantation and the intervertebral height at 1 week after implantation were significantly improved in the two groups (P < 0.05), but there was no difference between the two groups. The materials in the two groups had good biocompatibility with no rejection and no infection. Fusion cage subsidence occurred in two cases from the titanium mesh cage group. These findings indicate that both of carbon fiber interbody fusion cage and titanium mesh cage have good biocompatibility, improve the stability of the vertebral body, and restore the intervertebral height. Moreover, the carbon fiber material performance is better than the metal titanium mesh because of lower complication rate.


    中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


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    Preparing acellular nerve allografts by combined freeze-thaw and chemical methods
    Guan Shu-jun, Wang Wei, Li Yan
    2015, 19 (12):  1914-1918.  doi: 10.3969/j.issn.2095-4344.2015.12.021
    Abstract ( 314 )   PDF (854KB) ( 523 )   Save

    BACKGROUND: Host immune rejection is the main problem for nerve allograft in the repair of nerve defects. Therefore, how to avoid and minimize the immune rejection is the key to the success of nerve allografting.
    OBJECTIVE: To develop a new nerve pretreatment method by which Schwann cells and myelin can be removed from the peripheral nerve of dogs while the basilar membrane can be reserved integrally in order to obtain acellular nerve allografts.
    METHODS: Bilateral sciatic nerves from healthy adult dogs were taken and pretreated with the combined freeze-thaw and chemical methods followed by microscopic observation of ultrastructural features, histological staining and western blot analysis of its ingredients.
    RESULTS AND CONCLUSION: Pretreated acellular nerves with good ductility and excellent epineurium toughness were empty basal lamina tubes with no Schwann cells, myelin and fragments that were all removed thoroughly, but the basilar membrane was fully retained. These findings indicate that the optimized combination of freeze-thaw and chemical methods can efficiently clear Schwann cells and myelin which are the major antigenic components in the peripheral nerve, while preserve the basilar membrane to promote nerve regeneration. Therefore, this method can be an ideal method for preparation of tissue engineered nerves.


    中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


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    A preliminary determination of foot-related tissue elastic modulus
    Bian Qiang, Hu Hai-wei, Wen Jian-min, Yu Zhi-yong, Zhang Shuai, Jiang Yun-feng, Sun Wei-dong
    2015, 19 (12):  1919-1923.  doi: 10.3969/j.issn.2095-4344.2015.12.022
    Abstract ( 662 )   PDF (800KB) ( 2058 )   Save

    BACKGROUND: Currently, the material parameters of foot three-dimensional finite element models are almost all from abroad, which have no reports in China.
    OBJECTIVE: To preliminarily measure the parameters of foot muscle and tendon materials in Chinese people.
    METHODS: The dissection of flexor pollicis longus tendon and flexor pollicis brevis muscle and the medial and lateral heads, extensor hallucis longus muscle and tendon and the transverse head of adductor pollicis muscle and the oblique head, abductor pollicis brevis from the left leg and foot of fresh female specimens was performed. The cross-sectional area and length located in a fixture were measured and calculated for each sample. Sample loading was done, and one sample was measured four times to gather strength limit, maximum load data, and the load displacement curve. According to Hooke’s law, the elastic modulus of each specimen was calculated.
    RESULTS AND CONCLUSION: Relevant measurement data were harvested from nine samples, including the extensor hallucis longus, flexor pollicis longus, adductor muscle and abductor hallucis muscle cross head and oblique head, medial and lateral head of flexor pollicis brevis muscle and flexor hallucis longus tendon and the extensor hallucis longus tendon. These parameters included length, width, thickness, cross-sectional area, maximum loading, ultimate strength and elastic modulus test.


    中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


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    Timed morphological changes of human hepatocytes L-02 cultured at high density by the support of spherical porous chitosan microcarriers
    Zhang Rui, Liu Ming
    2015, 19 (12):  1924-1930.  doi: 10.3969/j.issn.2095-4344.2015.12.023
    Abstract ( 319 )   PDF (380KB) ( 412 )   Save

    BACKGROUND: Recently, microcarrier culture as a high concentration cell culture technology has been used in hepatocyte culture in vitro.
    OBJECTIVE: To periodically observe the morphological changes of human hepatocyte L-02 cultured by the spherical porous chitosan microcarrier.
    METHODS: The self-made spherical porous chitosan microcarrier sample as a support to culture human hepatocytes L-02 acted as experimental group; non-spherical porous chitosan microcarrier as a support to culture human hepatocytes L-02 as control group. Cells in two groups underwent cell count at regular time, and the morphological changes were observed in the experimental group, including inverted phase contrast biological microscope observation and scanning electron microscope observation.
    RESULTS AND CONCLUSION: The quantity of cultured cells in the two groups was increased in the first 3 days and reached the peak at the 3rd day. The cell quantity in the experiment group was obviously higher than that in the control group (P < 0.05). There was no significant difference in the three samples of the experimental group (P > 0.05). The quantity of hepatocytes adhered to the microcarrier surface was gradually increased in the former 3 days under the inverted phase contrast biological microscope. There were lots of cell clusters on the surface of a greater part of microcarriers, with the total survival rate of more than 90%, and hepatocytes kept a good morphological structure. Under the scanning electron microscope, lots of hepatocytes adhered tightly to each other on the surface and section of microcarrier as well as inside the microcarrier. It is indicated that the self-made spherical porous chitosan microcarrier as a support in three-dimensional environment can undergo cell culture with high concentration.


    中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


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    Basic fibroblast growth factor and fibrin glue in orthopedics
    Li Qi, Li Jian
    2015, 19 (12):  1931-1937.  doi: 10.3969/j.issn.2095-4344.2015.12.024
    Abstract ( 401 )   PDF (576KB) ( 552 )   Save

    BACKGROUND: Basic fibroblast growth factor can promote angiogenesis and connective tissue regeneration, but it can be degraded rapidly in vivo. Fibrin glue as a carrier can play a slow-release effect against the rapid degradation of basic fibroblast growth factor, so as to better play the biological role of basic fibroblast growth factor. But at present, the concrete application of them is still in the research stage.
    OBJECTIVE: To review the research progress of the application of basic fibroblast growth factor and fibrin glue in orthopedics.
    METHODS: The recent literature concerning the application of basic fibroblast growth factor and fibrin glue in orthopedics was extensively reviewed by the first author through a computer-based retrieval of CNKI and Medline databases (2000-2014).
    RESULTS AND CONCLUSION: Finally 64 articles were included in result analysis. Basic fibroblast growth factor can promote wound healing and tissue repair with the fibrin glue used as a carrier, but most studies are still in the experimental stage and its clinical application needs further study.


    中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


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    Stability of tissue engineering bone in the repair of bone defects: material degradation and bone formation
    Zhou Xiao, Qian Yu-fen
    2015, 19 (12):  1938-1942.  doi: 10.3969/j.issn.2095-4344.2015.12.025
    Abstract ( 404 )   PDF (558KB) ( 655 )   Save

    BACKGROUND: Scaffold materials are the important part of tissue engineering bone, and the ideal biodegradation speed of the scaffold materials can be in accordance with the regeneration speed of bone formation in order to achieve a long-term stability.
    OBJECTIVE: To summarize the biodegradability of different types of currently available scaffold materials and its relationship with bone formation.
    METHODS: The PubMed and CNKI database were searched by the first author using the key words of “tissue engineering bone, composite scaffold, scaffold degradation” in English and Chinese for articles addressing biodegradability of scaffold materials and its relationship with bone formation published during January 1996 and December 2013.
    RESULTS AND CONCLUSION: Many scaffold materials under organic, inorganic and organic-inorganic categories have been available and the current studies focus on inorganic materials and organic-inorganic composite materials. In vivo and in vitro studies indicate the different characteristics and relative merits of these scaffold materials. Organic materials have a relatively slow degradation rate while inorganic materials can completely degrade but have an insufficient mechanical property. For organic-inorganic composite materials, further studies are needed.


    中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


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    Porous tantalum in orthopedic applications: joint replacement and cartilage reconstruction scaffolds
    Li Bin, Xia Qing, Hua Yong-xin, Yang Guang, Pei Xiao-jie
    2015, 19 (12):  1943-1947.  doi: 10.3969/j.issn.2095-4344.2015.12.026
    Abstract ( 798 )   PDF (680KB) ( 1481 )   Save

    BACKGROUND: Porous tantalum with high porosity, low elastic modulus, high friction coefficient has stable biological characters and good biocompatibility, which is considered as an ideal implant material in orthopedic surgery.
    OBJECTIVE: To review the application situation of porous tantalum used in artificial joints, spine, bone necrosis, defects of bone and so on.
    METHODS: A computer-based search of PubMed, Wanfang, and VIP databases was performed for relevant articles published from 1990 to 2014 using the keywords of “porous tantalum, biological character, orthopedic applications” in English and Chinese.
    RESULTS AND CONCLUSION: Porous tantalum is a kind of good orthopedic implant material, with high porosity, low elastic modulus, high friction coefficient, and good compatibility. Porous tantalum is mostly used in the preparation of integrated acetabular cup, total hip arthroplasty acetabular cup, acetabular reinforcing pad, porous tantalum metal rod, tibial plateau prosthesis, patellar prosthesis and tibial plateau prosthesis, which has achieved good clinical effects.


    中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


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    Optimized choice of tissue-engineered tendon suture materials based on biomechanics characteristics
    Wang Ji-hong, Wen Shu-zheng, Lin Xiao-hui, Yin Chao, Fan Dong-sheng, Hao Zeng-tao, Jing Shang-fei, Han Chao-qian, Wang Yong-fei
    2015, 19 (12):  1948-1952.  doi: 10.3969/j.issn.2095-4344.2015.12.027
    Abstract ( 310 )   PDF (689KB) ( 914 )   Save

    BACKGROUND: The therapeutic effectiveness on tendon injury is closely related to the material of tendon suture.
    OBJECTIVE: To review the progress of tendon suture materials and tendon biomechnics in recent years.
    METHODS: A computer-based search of CNKI (January 1999 to December 2014), and PubMed (January 1950 to December 2014) was performed for relevant articles using the keywords of “tendon, suture materials, biomechanics” in Chinese and English, respectively.
    RESULTS AND CONCLUSION: Ideal tendon repair refers to the restoration of the continuity of its anatomical structure, tensile strength and sliding function in physiology, which is influenced by many factors. Suture technique and choice of suture materials are two steps that cannot be ignored. With the development of surgical tendon suture technique, in order to improve the quality of tendon healing, ideal tendon suture is first to have sufficient strength to avoid an early tensile fracture; secondly, the elasticity cannot be too large that can cause a gap between suturing ends and affect tendon healing, and time for protecting the tendon strength is as long as possible. Therefore, the optimal choice of tendon suture materials should be based on suture methods and biomechanical characteristics of suture lines, thereby to promote tendon healing.


    中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


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    Antibacterial properties of inorganic nano-antibacterial materials in orthodontics
    Li Na, Han Bing, Zhang Qian
    2015, 19 (12):  1953-1957.  doi: 10.3969/j.issn.2095-4344.2015.12.028
    Abstract ( 484 )   PDF (617KB) ( 859 )   Save

    BACKGROUND: There are usually removable appliances and fixed appliances in the mouth of orthodontic patients, resulting in periodontitis. Because of its high security, good heat resistance, long action time, not easy to produce resistance and wide antimicrobial spectrum, inorganic antibacterial agents have become a research hotspot.
    OBJECTIVE: To review the application and research progress of inorganic nano-antibacterial materials in orthodontic treatment.
    METHODS: A computer-based search of PubMed and CNKI databases was performed for articles about applications of inorganic nano-antibacterial materials in orthodontic treatment published from January 2001 to December 2014 using the keywords of “orthodontic, antibacterial agent” in English and Chinese, respectively.
    RESULTS AND CONCLUSION: Inorganic nano-antibacterial materials for oral bacteria have good antibacterial properties, and are a kind of ideal biological material. Bracket enamel adhesive, removable appliance resin material and bracket can play correct and antibacterial roles by modification of inorganic nano-antibacterial materials, so as to reduce complications such as dental caries. However, the application of nano-antibacterial materials is still in its infancy, the modified materials need to be studied further in terms of color problems, physical and chemical properties and biological security.


    中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


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    Immediate and delayed implantation of front teeth: comparison of periodontal tissue health degree and success rate
    Yao Xi, Zhang Ning, Li Yun-sheng, Li Hong-mei
    2015, 19 (12):  1958-1963.  doi: 10.3969/j.issn.2095-4344.2015.12.029
    Abstract ( 597 )   PDF (773KB) ( 1653 )   Save

    BACKGROUND: Numerous studies have demonstrated that the use of periodontal tissue-guided regeneration technique significantly elevated success rate of immediate technical planting. No significant difference is detected as compared with the delayed planting success rate in the clinic.
    OBJECTIVE: To compare the clinical effects of immediate implant and delayed implant in the restoration of anterior teeth.
    METHODS: A total of 100 cases with former dental implants, who had 160 diseased teeth, were enrolled in this study. They were divided into experimental and control groups according to the principle of random pairing. In the experimental group, the implant was put into the extraction sockets after minimally invasive tooth extraction with the use of periodontal guided tissue regeneration technique. In the control group, at 3 months after minimally invasive tooth extraction, implant was implanted in the sockets. Delayed planting repair of denture in the missing teeth area was performed with the use of periodontal guided tissue regeneration technique. Crown restoration was conducted in both groups at 3 months after implantation. Aesthetics, periodontal pocket depth and implant success rate were compared after repair in both groups.
    RESULTS AND CONCLUSION: Gingival esthetics score was better at 1, 3, 6 and 12 months after repair in the experimental group than in the control group (P < 0.05). Periodontal pocket depth was less at 1, 3, 6 and 12 months after repair in the experimental group than in the control group (P < 0.05). No significant difference in success rate of implants was detected at 12 months after repair between both groups (P > 0.05). Above findings confirmed that aesthetic effect, treatment cycle, and the health of periodontal tissue were better in the immediate implanting group than in the delayed implanting group. However, no significant difference in success rate was detected between immediate implanting and delayed implanting groups.


    中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


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    Joint prosthesis: material characteristics and physical therapy
    Zhao Lin
    2015, 19 (12):  1964-1968.  doi: 10.3969/j.issn.2095-4344.2015.12.030
    Abstract ( 456 )   PDF (718KB) ( 657 )   Save

    BACKGROUND: Artificial biomaterials are used instead of the existing joints with obvious lesion, which is defined as artificial joint replacement, for the purpose of easing pain, correcting deformities, restoring and improving the joint function.
    OBJECTIVE: To investigate the effect of joint prosthesis materials and physical therapy after joint replacement.
    METHODS: Wanfang, CNKI and PubMed databases were retrieved for articles related to joint prosthesis materials and physical therapy after joint replacement published from 2000 to 2014 using the keywords of “artificial joints, joint materials, physical therapy” in Chinese and English, respectively. Papers published recently or in authoritative journals were preferred in the same field. Based on inclusion and exclusion criteria, 15 papers were included in result analysis.
    RESULTS AND CONCLUSION: Artificial joint prosthesis materials have their own rehabilitation programs. Physical therapy after joint replacement includes physical factor therapy and exercise therapy. Physical factor therapy can reduce the release of inflammatory factors and promote the absorption of inflammatory factors factor, effectively relive pain, and facilitate the drug release from bone cement containing antibiotic drugs under low-frequency ultrasound intervention. Exercise rehabilitation therapy assisted by continuous passive motion machine can promote lymphatic return, reduce limb swelling, avoid the occurrence of venous thromboembolism, prevent and treat joint contractures, strengthen the muscle and promote recovery of joint function after joint replacement. Appropriate joint prosthesis and reasonable physical therapy after joint replacement can accelerate patient’s rehabilitation, reduce complications and achieve a good joint range of motion.


    中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


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