Loading...

Table of Content

    22 October 2013, Volume 17 Issue 43 Previous Issue    Next Issue
    For Selected: Toggle Thumbnails
    Bone morphogenetic protein-2 gene affects the histology and collagen type Ⅰ and Ⅱ expressions in degenerative intervertebral disc
    Lin Xi, Ye Jun-jian
    2013, 17 (43):  7501-7506.  doi: 10.3969/j.issn.2095-4344.2013.43.001
    Abstract ( 359 )   PDF (2093KB) ( 460 )   Save

    BACKGROUND: Studies have shown that the changes of extracellular matrix in degenerative intervertebral disc tissues mainly present as the decrease of collagen type Ⅱ and proteoglycan contents and the increase of collagen type Ⅰ content.
    OBJECTIVE: To explore the effect of adeno-associated virus-mediated bone morphogenetic protein 2 gene on nucleus pulposus Ⅰ and Ⅱ collagen levels in rabbit degenerative intervertebral disc tissues.
    METHODS: L2-3, L3-4, L4-5 and L5-6 lumbar discs of 12 New Zealand white rabbits were punctured to establish interverbral disc degeneration model. Subsequently, 12 rabbits were randomly divided into three groups, four rabbits in each group. The intervertebral discs in the adeno-associated virus-mediated bone morphogenetic protein 2 group were injected with the adeno-associated virus-mediated bone morphogenetic protein 2 gene, the intervertebral discs in the adeno-associated virus group were injected with adeno-associated virus only, while the discs in the normal saline group were injected with normal saline. All rabbits were sacrificed after injected for 8 weeks, and the L2-3, L3-4, L4-5 and L5-6 lumbar discs of each rabbit were collected, paraffin-embedded and sliced. The histological changes of nucleus pulposus were observed with hematoxylin-eosin staining, and the immunohistochemistry was used to detect the collagen type Ⅰ and Ⅱ expressions in nucleus pulposus. Semi-quantitative analysis was performed.
    RESULTS AND CONCLUSION: Hematoxylin-eosin staining showed that the nucleus pulposus in the intervertebral disc tissues was less in the adeno-associated virus-mediated bone morphogenetic protein 2 group, the nucleus pulposus was in single or clustered distribution with clear nucleus structure and without fibrous tissue filling. The tissue structures of nucleus pulposus were the same in the adeno-associated virus group and normal saline group, the cell number in nucleus pulposus was small, the nucleus pulposus was shrunken and shriveled, and the cells were filled with fibrous tissue and arranged disorderly. Immunohistochemistry staining showed the expression of collage type Ⅰ in the intervertebral disc nucleus pulposus of adeno-associated virus-mediated bone morphogenetic protein 2 group was higher than that of the adeno-associated virus group and normal saline group (P < 0.05); the expression of collage typeⅠ in the intervertebral disc nucleus pulposus of adeno-associated virus-mediated bone morphogenetic protein 2 group was lower than that of the adeno-associated virus group and normal saline group (P < 0.05). The results indicate that adeno-associated virus-mediated bone morphogenetic protein 2 can inhibit the expression of collagen type Ⅰ in the intervertebral disc nucleus pulposus, promote the expression of collagen type Ⅱ. Maintaining the content of collagen in intervertebral disc can keep the histological structure and morphology of intervertebral disc, stabilize the environment for nucleus pulposus cell growth, and delay the intervertebral disc degeneration.

    Figures and Tables | References | Related Articles | Metrics
    Three-dimensional measurement of acetabular side before arthroplasty for acetabular dysplasia
    Xu Jie, Ma Ruo-fan, Li Deng, Cai Zhi-qing, Li Liang-ping
    2013, 17 (43):  7507-7513.  doi: 10.3969/j.issn.2095-4344.2013.43.002
    Abstract ( 491 )   PDF (648KB) ( 514 )   Save

    BACKGROUND: The anatomical strucure of acetabulum is small and shallow in adult acetabular dysplasia patients. The large amount of callus and scar tissues in the acetabulum make it difficult to identify and install the acetabular cup during arthroplasty. The comprehensive understanding of the acetabulum before arthroplasty is the premise for selecting the appropriate acetabular prosthesis and making the acetabular reconstruction program.
    OBJECTIVE: To evaluate the application value of three-dimensional reconstruction technique in choosing the size of acetabular cup before total hip arthroplasty for acetabular dysplasia.
    METHODS: Spiral CT was carried out in the 11 acetabular dysplasia patients who waiting for total hip arthroplasty. The acetabulum was multi-planar reconstructed, and the size of the acetabular cup was determined through digitized acetabular cup template implantation, and then the mathching degree assessment was performed to compare with the actual size.
    RESULTS AND CONCLUSION: Spiral CT could clearly show the acetabular morphology, and the 71.4% of the acetabular size chosen in the three-dimensional preoperative plan was the same as actual one, the intraclass correlation coefficient was 0.888. The agreement was much higher than that of two-dimensional preoperative plan based on X-ray plain film. For the patients with acetabular dysplasia, the acetabulum became samller and shallower, and there were various extents of bone defects in the superior-lateral acetabulum. Three-dimensional multi-planar reconstruction can effectively evaluate the acetabular morphology, and three-dimensional preoperative plan can provide useful information for the choice of implant.

    Figures and Tables | References | Related Articles | Metrics
    One-stage total hip arthroplasty for the treatment of special acetabular fracture
    Guan Qun, Feng Shi-long, Tang Jin, Liao Yi-ming, Yang Tao, Cheng Jun
    2013, 17 (43):  7514-7520.  doi: 10.3969/j.issn.2095-4344.2013.43.003
    Abstract ( 580 )   PDF (662KB) ( 341 )   Save

    BACKGROUND: The most effective method for the treatment of acetabular fracture is open reduction and internal fixation, however, this treatment for some special types of acetabular fracture cannot get satisfactory prognosis, and is prone to complications, such as traumatic coxarthrosis and avascular necrosis of femoral head.
    OBJECTIVE: To evaluate the curative effect of open reduction and internal fixation and total hip arthroplasty in the treatment of special acetabular fracture.
    METHODS: Twelve cases of acetabular fracture were included, including seven cases of traffic accident wound, three cases of crush injury, and two cases of falling injury. The type of bone fracture: two cases of posterior wall fracture, two cases of posterior column and posterior wall fracture, one case of T shaped fracture, five cases of transverse and posterior wall fracture, and two cases of acetabular roof sexual fracture. Complications: one case was femoral head centric dislocation, five cases were latter dislocation, and three cases were caput femoris fractures. Before injury, three cases had coxarthrosis, and two cases were avascular necrosis of femoral head. All the cases were treated with open reduction internal fixation and total hip arthroplasty, of which nine cases were treated with biological prosthesis, and three cases were treated with bone cement prosthesis. The time from hospitalization to surgery was 3-15 days, and average was 6 days. The patients were followed-up once every 2 months in 1 year after replacement, and the Harris score was used to evaluate the hip function recovery.
    RESULTS AND CONCLUSION: No surgical site and deep wound infection, joint dislocation, lower limb deep vein thrombosis, and death were found in these 12 cases. Among them, 11 cases were followed-up for a longtime; the follow-up was lasted for 6-82 months. The acetabular fracture was healed at 6-16 months after reduction without prosthesis loosening and sinking. The hip function was evaluated during final follow-up according to the Harris score: excellent in eight cases, good in two cases, poor in one case, and the excellent and good rate was 91%. Open reduction internal fixation and one-stage total hip arthroplasty can avoid long-term bed, get out of bed as soon as possible, and reduce complications, thus reconstruct the hip joint painlessly and good functionally.

    Figures and Tables | References | Related Articles | Metrics
    Measurement of Chinese distal femur and its significances in total knee arthroplasty and prosthesis design
    Li Liang, Wu Hai-shan
    2013, 17 (43):  7521-7526.  doi: 10.3969/j.issn.2095-4344.2013.43.004
    Abstract ( 489 )   PDF (640KB) ( 701 )   Save

    BACKGROUND: It has become increasingly concerned by the industry to detailed understand the morphology of people’s knee joint, thus achieving personalized and gender differentiated total knee arthroplasty, in order to design the knee joint prosthesis that match the characteristics of Chinese people.
    OBJECTIVE: To measure and characterize the morphological parameters of distal femur of normal adult Chinese people by CT tomography and three-dimensional reconstruction, and to discuss the differences between male and female in morphology of distal femur.
    METHODS: Seventy normal Chinese adults (35 males and 35 females, aging from 21 to 60 years) received bilateral knee joint CT scan. The scanning images of distal femur which we needed were collected and handled with three-dimensional reconstruction or Picasa 3.0 software for collages and overlapping exposure. The posterior condylar angle, anterior condylar angle and trochlear angle were measured on the images that treated by the software, as well as the transverse diameter of distal femur, lateral condylar height, and the ratio between them.
    RESULTS AND CONCLUSION: The mean posterior condylar angle of Chinese women was larger than that of Chinese men (P < 0.05); the mean anterior condylar angle of Chinese men was larger than that of Chinese women (P < 0.05); The transverse diameter of distal femur, lateral condylar height and the femoral surface ratio (diameter/epicondyle height) of Chinese men were larger than those of Chinese women (P < 0.05). The results showed that differences exist in morphology of distal femur between Chinese and western people. Also, the differences exist between male and female in Chinese people. These differences should be concerned in the design of femoral prosthesis for Chinese people as well as in selecting and placing of femoral prosthesis before or during the total knee arthroplasty.

    Figures and Tables | References | Related Articles | Metrics
    Three-stage installment correction for severe rigid scoliosis
    Long Zhi-sheng, Chen Gang, Chen Zong-he, Li Hong-bo, Yu Xi-hua, Xiao Yu-hua, Gong Fei-peng, Li Yu-xu, Tang Zhi-ming, Li Jian-fei
    2013, 17 (43):  7525-7533.  doi: 10.3969/j.issn.2095-4344.2013.43.005
    Abstract ( 373 )   PDF (671KB) ( 401 )   Save

    BACKGROUND: The treatment of severe rigid idiopathic scoliosis is the difficulty of clinical treatment. The studies in recent years have shown that the three-stage correction is a safe and effective treatment method.
    OBJECTIVE: To explore the efficacy of three-stage correction in the treatment of severe rigid scoliosis.
    METHODS: Retrospective analysis was performed on 10 severe rigid scoliosis patients undergoing three-stage correction, the mean age of the patients was 12 years. The average Cobb angle in the coronal plane was 140° (ranged 110°-180°), the average Cobb angle in the sagittal plane was 75° (ranged 50°-100°). The treatment was divided three stages: anterior release, Halo-plevic traction and third step with posterior osteotomy and fixation.
    RESULTS AND CONCLUSION: All of the patients underwent the surgery safely without severe complications. After anterior release and Halo-plevic traction, the Cobb angle in the coronal plane was 90°, and the mean correction rate was 35.7%; the Cobb angle in the sagittal plane was 50° with correction rate of 33.3%. The mean Cobb angle in the coronal plane was 40° with the correction rate of 71.4% after osteotomy, and the Cobb angle in the sagittal plane was 35° with the correction rate of 53.3%. The results show that three-stage correction is a safe and effective method for the treatment of severe rigid scoliosis.

    Figures and Tables | References | Related Articles | Metrics
    Posterior vertebral column resections combined with titanium screw rod fixation for the treatment of severe spinal deformity
    Kahaer•Aikenmu, Chu Ge, Huang Jia, Gao Qi-le, Wu Jia-wen, Lin Min-zhong
    2013, 17 (43):  7534-7539.  doi: 10.3969/j.issn.2095-4344.2013.43.006
    Abstract ( 282 )   PDF (586KB) ( 496 )   Save

    BACKGROUND: Vertebral column resection is the frequently mentioned spinal orthopaedic concept. Due to the high requirement of the operation skill, difficulty and more complications, the previous studies have reported from different aspects, and many researchers have focused on the analysis of complications, that may be related with the procedure and manner.   
    OBJECTIVE: To analyze the efficacy and complications of posterior vertebral column resection combined with titanium screw rod fixation for the treatment of severe spinal deformity.
    METHODS: We retrospectively analyzed 48 patients with severe spinal deformity who treated with posterior vertebral column resection and titanium screw rod fixation, with an average removal of 1.6 vertebral. The patients were followed-up for 15-64 months. The Cobb angle (coronal plane and sagittal plane) of the patients before treatment, after treatment and in the final follow-up was analyzed, and the relative complications of the surgery were analyzed. 
    RESULTS AND CONCLUSION: The patients with spinal deformity were divided into five categories, included kyphoscoliosis (n=11), severe scoliosis (n=20), congenital spinal deformity (n=4), spherical kyphosis (n=3), and angular kyphosis (n=10). The average coronal plane deformity angle of the patients was corrected from 84° preoperation to 35° postoperation, with the total correction rate of 54%. The average sagittal plane deformity angle was corrected from 90° preoperation to 42° postoperation, and the sagittal plane Cobb angle was decreased for 48°. The mean operation time was 545 minutes (204–1 355 minutes), the intraoperative blood loss was 1 610 mL (50–8 244 mL), and the average blood loss was 65%. After treatment, 31 cases had complications, including 13 cases of intraoperative neurological dysfunction (observed through electrophysiological monitoring and wake), permanent neurological dysfunction did not occur after timely treatment. The posterior vertebral column resection and titanium screw rod fixation can obtain better effect in the treatment of severe spinal deformity, but the procedure has high complications and is difficult for operation.

    Figures and Tables | References | Related Articles | Metrics
    Vertebra reduction after treatment of severe vertebral compressive fractures by kyphoplasty
    Liu Tao, Feng Ji-chuan, Zhuo Rui-li, Qiang Xiao-jun
    2013, 17 (43):  7540-7545.  doi: 10.3969/j.issn.2095-4344.2013.43.007
    Abstract ( 495 )   PDF (619KB) ( 381 )   Save

    BACKGROUND: Due to the puncture and difficult reduction, severe vertebral compressive fracture is considered to be the relative contraindication of vertebroplasty and kyphoplasty.
    OBJECTIVE: To investigate the vertebra reduction after the treatment of severe vertebral compressive fractures with percutaneous kyphoplasty.
    METHODS: Thirty patients (42 vertebral bodies) with severe compressive fractures were included. The compressive rate of the affected vertebral bodies was 75%-83%. The direction of percutaneous puncture was guided under digital subtraction angiography, and then postural reduction and local kyphoplasty were performed. After satisfactory reduction, bone cement was injected.
    RESULTS AND CONCLUSION: All the 30 patients tolerated procedure well. The mean height of the anterior, mid and posterior vertebral body was improved from (0.48±0.17) cm, (0.83±0.23) cm and (2.44±0.33) cm preoperatively to (0.71±0.22) cm, (1.21±0.25) cm and (2.44±0.33) cm respectively after operation. The postoperative height of the anterior, mid and posterior vertebral body was significantly higher than that before operation. The visual analogue scale score after treatment was significantly lower than that before operation. The results indicate that percutaneous kyphoplasty can ease pain, restore vertebral body height and improve quality of life of the patients with severe vertebral compressive fractures.

    Figures and Tables | References | Related Articles | Metrics
    Anterior cervical Cage-assisted fusion combined with locking titanium plate internal fixation for the treatment of extension-type cervical fracture
    Wu Jian, Liu Yan-xi, Qin Xing-xing, Zheng Yong, Shi Zhen, Bao Tong-zhu
    2013, 17 (43):  7546-7551.  doi: 10.3969/j.issn.2095-4344.2013.43.008
    Abstract ( 390 )   PDF (702KB) ( 456 )   Save

    BACKGROUND: There is no literature about the treatment according to the mechanism of cervical spine injury classification, especially for the treatment of extension type cervical fracture/dislocation with merger cases of posterior composite structure damage, whether simple anterior approach can meet the needs of the treatment has no detailed elaboration. This article may analyze from the aspect of cervical spine injury mechanism.
    OBJECTIVE: To observe the short-term effect of anterior cervical Cage-assisted fusion combined with locking titanium plate internal fixation for the treatment of extension type cervical fracture.
    METHODS: A retrospective analysis was performed in 15 extension type cervical spine fracture dislocation patients treated with decompression anterior cervical intervertebral disc resection plus bone graft with cage-fusion locking titanium plate internal fixation from June 2006 to March 2011 in the Department of Orthopedics, Xianning Central Hospital, including 10 cases of single segment injury and treatment, and five cases of multiple segment injury and treatment. Japanese Orthopaedic Association score and the neck disability index were compared before and after treatment; the cervical flexion and height were measured according to the antersposterior X-ray film taken before fixation, 1 week after fixation and final follow-up.  
    RESULTS AND CONCLUSION: The patients were followed-up for 8-37 months. One case had Cage mild sinking and shift, and there was no internal fixation breakage or loosening in all the patients. Transient pharyngeal discomfort was observed in 11 patients. Compared with the preoperation, the Japanese Orthopaedic Association score, neck dysfunction index, fusion segment cervical flexion and fusion segment intervertebral disc height were significantly improved at 1 week after fixation and final follow-up (P < 0.05). There were no significant differences between 1 week after fixation and final follow-up (P > 0.05). The short-term effect of decompression anterior cervical intervertebral disc resection plus bone graft with cage-fusion locking titanium plate internal fixation for the treatment of extension-type cervical fracture is good.

    Figures and Tables | References | Related Articles | Metrics
    Single-cage interbody fusion combined with single-side pedicle screw fixation for single-side lumbar disc herniation
    Chen Ji-feng, Sheng Wei-bin, Huang Bo, He Bo, Xu Tao
    2013, 17 (43):  7552-7558.  doi: 10.3969/j.issn.2095-4344.2013.43.009
    Abstract ( 227 )   PDF (727KB) ( 498 )   Save

    BACKGROUND: As for patients with one-side backleg pain who were candidates for surgery treatment of lumbar intervertebral disc herniation, the common treatment includes lumbar vertebral plate opening and decompression, and laminectomy in combination with compression and bilateral pedicle screw fixation. However, these therapeutic approaches are not satisfactory.
    OBJECTIVE: To explore the feasibility and efficiency of single-side lumbar interbody fusion and unilateral pedicle screw fixation for treatment of lumbar intervertebral disc herniation patients with one-side backleg pain.
    METHODS: Forty patients with single-side lumbar disc herniation, suffering from unilateral backleg pain, were recruited from Shihezi People’s Hospital, China and were treated with single-side lumbar interbody fusion and unilateral pedicle screw internal fixation. The neurological function of patients was assayed using Japanese Orthopaedic Association score system before and after treatment, the improvement rate and excellent/good rate were calculated. Suk criterion was used to determine fusion status.
    RESULTS AND CONCLUSION: The mean follow-up period for 40 patients was ranging from 6 months to
    60 months. All incisions healed well, with no infection. The Japanese Orthopaedic Association score after
    6 months of treatment was significantly higher than that before treatment (P < 0.05), with the excellent and good rate up to 88%. According to Suk criterion, 38 patients achieved bone graft fusion or possible fusion, with interbody fusion rate 95%, as revealed by radiographic and CT evidence. The remaining two patients were detected fusion at 9 months after treatment. Our findings indicate that, single-cage lumbar interbody fusion combined with single-side pedicle screw fixation is the feasible surgical technique and provides satisfactory effects in treating single-side lumbar disc herniation.

    Figures and Tables | References | Related Articles | Metrics
    Patellar ring pins and FiberWire braided polyblend sutures tension band fixation for the treatment of patellar fracture
    Huang Kui, Liu Ke-bin
    2013, 17 (43):  7559-7564.  doi: 10.3969/j.issn.2095-4344.2013.43.010
    Abstract ( 607 )   PDF (542KB) ( 629 )   Save

    BACKGROUND: K-wire and steel wire tension band wiring is the most commonly method for the treatment of patellar fracture. However, there have been many reports of complications related to the mental implants. Based on the reasons above, some scholars begin to replace the steel wire with braided polyester sutures for the treatment of patellar fracture.
    OBJECTIVE: To observe the effect of patellar ring pins and FiberWire braided polyblend sutures tension band fixation for treatment of patellar fracture.
    METHODS: We performed a retrospective analysis involving 26 patients with patellar fracture (16 males, 10 females, at the age of 36-54 years with a mean age of 44.6 years) who were treated with patellar ring pins and FiberWire braided polyblend sutures tension band fixation.
    RESULTS AND CONCLUSION: All the patients were followed-up for 6-18 months, average of 12 months. All patients were primary healing and achieved bone union in 8-16 weeks, averaged in 12 weeks from surgery. There was no fracture fragment displacement, internal fixation loosening and break. No pins protruding from the subcutaneous and irritate the skin. According to the Lysholm&Gillquist scales, 18 cases were excellent, four cases were good, and four cases were fair, with the excellent and good rate of 85%. Tension band fixation using patellar ring pins and FiberWire braided polyblend sutures resulted in good outcomes with few complications.

    Figures and Tables | References | Related Articles | Metrics
    Lateral patellar retinacular release combined with decomposition: Repair without damage to the patellar cartilage surface
    Ma Li-xue, Gao Zhi-guo, Luan Jing-bin, Kong Qing-bo, Zhao Wei, Zhang Wei-dong, Sun Cheng-bin,
    2013, 17 (43):  7565-7570.  doi: 10.3969/j.issn.2095-4344.2013.43.011
    Abstract ( 386 )   PDF (732KB) ( 352 )   Save

    BACKGROUND: Excessive lateral pressure syndrome is often associated with lateral retinacular tension and radiographic patellar tilt. CT scan displayed that lateral retinacular release can effectively correct patellar tilt.
    OBJECTIVE: To study the effect of arthroscopic lateral retinacular release combined with intraosseous drilling and decomposition in the treatment of excessive lateral pressure syndrome.
    METHODS: Thirty-two patients with excessive lateral pressure syndrome were treated by arthroscopic lateral release combined with intraosseous drilling and decomposition. The Lysholm scoring system was used to evaluate the treatment effect.
    RESULTS AND CONCLUSION: The mean duration of follow-up was 12 months. After 1 month, pain of all patients was released or disappeared; after 1 year, pain of 26 cases disappeared basically. Lysholm scoring system assessment showed 20 cases were rated as excellent, six cases were as good, four cases were as fair and two cases were as poor. The excellent and good rate was 83.6%. The patients’ subjective satisfaction rate was 92.8%. The results indicate that arthroscopic lateral release combined with intraosseous drilling and decomposition is a good method to treat excessive lateral pressure syndromewere. It has the advantages of less trauma and rapid recovery. Patellar decomposition has a good effect in the treatment of patellofemoral pain associated with patellar tilt outward and lightens articular cartilage degeneration without damage to patellar cartilage surface.

    Figures and Tables | References | Related Articles | Metrics
    Finite element model of distal tibial articular surface defect: Biomechanical analysis
    Yu Hua, Li Shao-xing, Zhao Chang-yi, Yan Jin-cheng
    2013, 17 (43):  7571-7580.  doi: 10.3969/j.issn.2095-4344.2013.43.012
    Abstract ( 381 )   PDF (925KB) ( 456 )   Save

    BACKGROUND: Finite element analysis has been widely used for the research of bone and joint biomechanics, but the reports about finite element analysis of distal tibial articular surface defect are rare at home and abroad.
    OBJECTIVE: To establish ankle three-dimensional finite element model, produce distal tibial articular surface defects with different areas, and to simulate the distal tibial articular surface deformation and displacement under the different phases, thus predict the maximum allowable degree of distal tibial articular surface defect and explore the mechanics pathogenesis of ankle traumatic arthritis.
    METHODS: Continuous tomographic images were obtained by multi-slice spiral CT scan of a normal adult male ankle, and then the images were imported into the Mimics medicine modeling software to generate a entity model; the large general-purpose finite element analysis software ANSYS 13.0 was used for meshing, material property assignment and generating a finite element model. Restricted boundary conditions and simulated ankle distal end axial force, and then the stress distribution and displacement results of distal tibial articular surface in different phases were obtained. 
    RESULTS AND CONCLUSION: The total number of units of the established finite element model of ankle joint was
    157 990, and the total number of nodes was 193 801. On three phases, with the increase of the distal tibial defect area, the contact area was gradually decreased, especially in plantar flexion with the defect diameter of 13 mm, the change of the area was most obvious; The contact area of the neutral position was largest; with the increase of the distal tibial defect area in the neutral position and dorsiflexion, the peak stress was increased gradually, and significantly increased after the diameter changed into 11-13 mm; in the neutral position and 10° of dorsiflexion, the peak stress mainly concentrated in the posteromedial and posterolateral quadrant; in 10° of plantar flexion, the change was complex, and when the diameter was 11-13 mm, the peak stress was increased gradually with the increasing of defect area, when the diameter increased to 13 mm, the peak stress reached maximum. The maximum diameter of distal tibial articular surface defect was considered to be 11-13 mm. The joint function will be affected when the diameter of distal tibial articular cartilage and bone bed defects was more than 11-13 mm.

    Figures and Tables | References | Related Articles | Metrics
    Special design and three-dimensional modeling of artificial femur head
    Zhou Yong, Zou Chun-hua, Zhang Chao-yue
    2013, 17 (43):  7581-7586.  doi: 10.3969/j.issn.2095-4344.2013.43.013
    Abstract ( 781 )   PDF (638KB) ( 469 )   Save

    BACKGROUND: It is difficult to adjust the anteversion angle of cementless hip joint. Some areas rely on the intraoperative three-dimensional navigation technique to ensure the accuracy of the anteversion angle, but its high cost limits the promotion prospects.
    OBJECTIVE: To design a kind of artificial femur head, which has special functions to freely adjust the anteversion angle of artificial femur head during operation and lock prosthesis handle to prevent femur prosthesis dislocation and looseness, and to intuitively display the special design concept of this kind of artificial femur head through the three-dimensional dynamic image aided by computer.
    METHODS: According to the design idea, AutoCAD software was used to get the design drawings for artificial femur head. The three-dimensional modeling was performed by 3DMax software in order to observe the form and degrees of verisimilitude of model.
    RESULTS AND CONCLUSION: The AutoCAD software was used to draw out the design drawings of artificial femur head according to the design requirements and design idea: the prosthesis handle had three lock hole channel and its basal part was for scale, and rotating the scale could change the anteversion angle of prosthesis neck; the shape of the prosthesis neck was dentate cylindrical. The 3DMax software was used to build the three-dimensional model of the artificial femur head, and the design, form and degrees of verisimilitude of the model comply with the design requirements. The whole structure of the three-dimensional model of artificial femur head is clear and the design is reasonable, which can provide a theoretical reference for further design of artificial femur head.

    Figures and Tables | References | Related Articles | Metrics
    Fas gene expression of intervertebral disc in the patients with intervertebral disc herniation
    Lü Hao-ran, Yang Jin-shun, Huang Yan, Zhao Yu, Feng Shan-wei
    2013, 17 (43):  7587-7593.  doi: 10.3969/j.issn.2095-4344.2013.43.014
    Abstract ( 557 )   PDF (692KB) ( 464 )   Save

    BACKGROUND: The clinical research have found that the interbervebral disc herniation often occurs in several members or even all the members of a family, and the location, reason and symptom are basically the same, indicating that genes play an important role in this kind of disease.  
    OBJECTIVE: To analyze the apoptosis Fas gene expression characteristics of lumbar disc in the familial patients with intervertebral disc herniation.
    METHODS: Semi-quantitative reverse transcription-PCR was used to test Fas gene expression of vertebral pulp and cartilage endplate in the intervertebral disc among 15 familial patients, 21 ordinary patients and five fresh cadavers.
    RESULTS AND CONCLUSION: Fas gene expression level of endplate of familial and ordinary patients with intervertebral disc herniation was higher than that of fresh cadavers, and there was no significant difference (P <0.05); there was no significant difference in Fas gene expression in endplates between familial patients and ordinary patients with intervertebral disc herniation (P > 0.05). Compared with the vertebral pulps of ordinary patients with intervertebral disc herniation and fresh cadavers, there was no significant difference in the Fas expression of vertebral pulps of familial patients with intervertebral disc herniation (P > 0.05). The increasing Fas gene expression may be secondary in the endplates of familial patients with intervertebral disc herniation, which can prevent intervertebral disc degeneration through preventing the endplate degeneration.

    Figures and Tables | References | Related Articles | Metrics
    Anterior approach versus posterior approach for thoracolumbar spinal tuberculosis fracture: A Meta-analysis
    Cao Peng, Aikeremujiang•Muheremu, Wu Zhong-yan, Wang Xin-ling, Jia Min
    2013, 17 (43):  7595-7601. 
    Abstract ( 400 )   PDF (757KB) ( 417 )   Save

    BACKGROUND: There is a high prevalence of spinal tuberculosis in developing countries. Beside systematic chemotherapy, there are still some patients who need surgical treatment at certain phase of systematic treatment. However, there is no standard method for surgical treatment of spinal tuberculosis yet.
    OBJECTIVE: To systematically evaluate the effect of anterior approach and posterior approach through consulting the literatures on the comparison between anterior approach and posterior approach for the treatment of spinal tuberculosis.
    METHODS: The PubMed database, Medline database, Elseveir database, Wanfang database and CNKI database were searched with the key words of “thoracolumbar tuberculosis, controlled randomized trial, RCT, anterior, posterior” in Chinese and English. The randomized controlled trials on the comparison between anterior approach and posterior approach for the treatment of spinal tuberculosis were included. The operative time, intraoperative blood loss, correction degree of Cobb angle, loss of Cobb angle at final follow-up, allograft fusion time, total hospital stay and the excellent and good rate of the effectiveness were compared by Revman5.1 software.
    RESULTS AND CONCLUSION: A total of 1 438 articles were screened out, and finally 9 randomized controlled trials were included. The total number of patients was 692, in which 324 were treated with anterior approach and 368 were treated with posterior approach. The operative time of anterior approach of 46.25(40.23, 52.26) minutes was less than that of posterior approach; the intraoperative blood loss of anterior approach of 148.91(135.12, 1 625.70) mL less than that of posterior approach; the correct degree of Cobb angle of anterior approach of 2.40°(2.21°, 4.62°) was smaller than that of posterior approach; the loss of Cobb angle of anterior approach of 0.66°(0.41°, 0.91°) was larger than that of posterior approach; the total hospital stay of anterior approach of 0.34 (-0.32,1.01) days was less than that of posterior approach; the allograft fusion time of anterior approach was less than that of posterior approach for 0.26 (0.18, 0.34) months; the number of cases with excellent and good effect of anterior approach was more than that of posterior approach for 1.18(-0.48, 2.85); there were significant differences in operative time, intraoperative blood loss, correct degree of Cobb angle, loss of Cobb angle at final follow-up and allograft fusion time between anterior and posterior approaches (P < 0.01). The results showed that there were significant differences in operative time, intraoperative blood loss, correct degree of Cobb angle, loss of Cobb angle at final follow-up and allograft fusion time between anterior and posterior approaches for the treatment of spinal tuberculosis, but there were no significant differences in total hospital stay and surgical efficacy.

    Figures and Tables | References | Related Articles | Metrics
    Anatomic plate versus dynamic hip screw in the treatment of intertrochanteric fractures: A Meta-analysis
    Ma Hong-liang, Peng Jun, Chen Yi
    2013, 17 (43):  7602-7609. 
    Abstract ( 270 )   PDF (958KB) ( 451 )   Save

    BACKGROUND: There is no consensus on the choice of anatomic plate or dynamic hip screw for the treatment of intertrochanteric fracture. Current research is limited to small-sample studies, and it is difficult to carry out a large-sample multicenter analysis.
    OBJECTIVE: To carry out Meta-analysis about the literature on anatomic plate versus dynamic hip screw in the treatment of intertrochanteric fractures, in order to evaluate the efficacy of anatomic plate versus dynamic hip screw in the treatment of intertrochanteric fractures.
    METHODS: The PubMed database (1995-2013), EMCC database (1995-2013), CBM database (1995-2013), CNKI database (1995-2013), VIP database (1989-2013) and Wanfang database (1995-2013) were searched by computer to collect the controlled trials of anatomic plate versus dynamic hip screw for the treatment of intertrochanteric fractures. Then, the retrieved studies were screened according to predefined inclusion and exclusion criteria. The quality of the included studies was evaluated to extract usefully data, and Meta-analysis was performed by using the RevMan5.0 software.
    RESULTS AND CONCLUSION: A total of 19 controlled trials were included with a total of 1 730 cases. Among them, 764 cases were belonged to the anatomic plate group, and dynamic hip screw group included 966 cases. The Meta-analysis results indicated that there were no statistically significant differences in fracture healing time, prognosis excellent and good rate and postoperative complications between two groups (P=0.34, 0.58, 0.80); the operative time, intraoperative blood loss and postoperative drainage volume in the anatomic plate group were lower than those in the dynamic hip screw group (P < 0.000 01). The results indicate that anatomic plate and dynamic hip screw have the similar clinical efficacy for the treatment of intertrochanteric fractures, but the anatomical plate has relatively simple operation and less bleeding. Due to the poor quality of the included literatures and high bias occur and influence the effect, so more well-designed multi-center randomized controlled trials should be performed to provide high-quality evidence.

    Figures and Tables | References | Related Articles | Metrics
    Treatment strategies and biomechanical analysis for ulna coracoid process fractures
    Liu Ren-hao, Zhou Nan, Bi Zheng-gang
    2013, 17 (43):  7610-7617. 
    Abstract ( 734 )   PDF (717KB) ( 670 )   Save

    BACKGROUND: Fractures of the coronoid progress are common in patients with elbow dislocations, and often accompanied by elbow ligament and joint capsule laceration. The coronoid progress fracture often leads to elbow joint instability, if cannot get the correct therapy, will result in repeatedly elbow instability, dislocation, and cause long-term irreversible damage to the elbow. 
    OBJECTIVE: To review the literatures about coronoid fractures and relative anatomic and biomechanical studies.
    METHODS: An electronic search of the Web of Science database was conducted for clinical and experimental researches about coronoid fractures and relative anatomic and biomechanics published from January 1990 to March 2013, the key words were “coronoid process of the ulna, coronoid fracture, treatment method, research progress”. The articles published earlier and repetitive researches were excluded.
    RESULTS AND CONCLUSION: Coronoid process is an important primary stabilizer of elbow joint, The coronoid process combined with the soft tissues of ligaments, joint capsule and muscles that attached on the coronoid plays an important role in maintaining the elbow axial, varus, valgus and rotation stability. The selection of the treatment strategies for coronoid process fracture depends on the fracture type, degree of fracture fragments crush and injury of medial and lateral collateral ligament and the anterior capsule. Uncomminuted large fractures can be treated with open reduction and internal fixation; comminuted fractures can be treated with reduction and internal fixation by the largest fracture fragments, autograft reconstruction or artificial coronoid process replacement; the repair of small coronoid process fracture depends on the circumstances; if the elbow gets enough stability after repair of soft tissue injury, it cannot be addressed, if not, the elbow should be repaired with sutures or anchors. Earlier motion after operation is important to get better function, and the hinged external fixator can be used if necessary.

    Figures and Tables | References | Related Articles | Metrics
    Ilizarov technique in the treatment of nonunion: Annotation and consideration of the “gold standard” application
    Li Peng, Du Gang-qiang, Zhang Kai
    2013, 17 (43):  7618-7623.  doi: 10.3969/j.issn.2095-4344.2013.43.018
    Abstract ( 570 )   Save

    BACKGROUND: Ilizarov technique is an effective treatment method which can solve various complications that occurred in the process of treatment, especially for the treatment of nonunion associated with soft tissue defects or severe infection.
    OBJECTIVE: To review the research progress of nonunion treatment with the Ilizarov technique.
    METHODS: A computer-based search was performed on the CNKI database and PubMed database from January 1992 to April 2013 for the articles related to the Ilizarov technology for the treatment of nonunion. The key words of “nonunion, external fixator, Ilizarov” in English and “nonunion, fracture nonunion, external fixation, Ilizarov” in Chinese were used to search the articles in the title and the abstract. Finally, a total of 37 articles were included to review.
    RESULTS AND CONCLUSION: Ilizarov technique is an effective method to treat limbs nonunion with the infection and severe bone defect. It has become an internationally recognized gold standard. Due to the firmly fixation of the Ilizarov ring external fixator, it can not only eliminate the shear force and rotation stress, thus playing a role of stretch tension and compression, but also has the cyclical micro-axialmotion characteristic during weight-bearing walking which can better promote bone union. Based on the reviews of the research progress of Ilizarov technique in the treatment of nonunion in recent years, we further investigate the advantages and methods of Ilizarov technique in the treatment of limbs nonunion. The clinical application of the method should follow the individual principle, and then choose the best and suitable method based on the analysis of advantages and disadvantages about the patient’s condition.

    Figures and Tables | References | Related Articles | Metrics
    Repair and reconstruction of segmental long bone defect: Theory and application advances
    Li Min, Chen Guo-fen, Wang Jian, Shi Zhan-jun, Shaikh Atik Badshah, Zheng Shao-wei
    2013, 17 (43):  7624-7629.  doi: 10.3969/j.issn.2095-4344.2013.43.019
    Abstract ( 422 )   PDF (664KB) ( 685 )   Save

    BACKGROUND: Various methods have been reported for the repair and reconstruction of long bone segmental defect, but all of them have different advantages and disadvantages which limit their wide application. And this still presents as a huge problem for many orthopaedics.
    OBJECTIVE: To review the latest research on reconstruction and repair of long bone segmental defects at national and international level.
    METHODS: A computer-based retrieval was conducted in PubMed database, CNKI database and VIP database by the first author for the articles published from January 1990 to December 2012, on the repair and reconstruction of long bone segmental defect with the key words of “bone defect, long bone reconstruction, tissue engineering of bone, scaffolds, bone reconstruction, bone graft, bone tumor, tumor resection, musculoskeletal tumors, regeneration, autografts” in English and “large segment, bone defects, bone tumors, soft tissue tumors, tumor resection, tissue engineering, bone graft” in Chinese. A total of 104 articles were screened out, and finally, 52 articles were included for further research.
    RESULTS AND CONCLUSION: Traditional method for the repair of long bone segmental defect includes autologous or allogeneic bone graft, bone lengthening and artificial prosthesis replacement. The development of prosthesis that was suitable for child limb salvage and consistent with the child growth characteristics has become the challenge to child limb salvage. In order to solve the problem, we designed the prosthesis that can continuously extent, and applied for the limb salvage reconstruction of tumor. With the development of medical technology, all kinds of artificial bone, especially bone tissue engineering and gene treatment are being gradually used to repair bone defect, which will further enhance the clinical evaluation of bone defect repair, and that is the direction of further research.

    Figures and Tables | References | Related Articles | Metrics
    Choice of bone reconstruction methods and materials after chondrosarcoma resection
    Peng Jin-hui, Liu Ning, Xu Wei, Zhou Rong, Zhang Hao, Wang Zhi-wei, Qian Qi-rong
    2013, 17 (43):  7630-7635.  doi: 10.3969/j.issn.2095-4344.2013.43.020
    Abstract ( 405 )   PDF (842KB) ( 374 )   Save

    BACKGROUND: The prognosis of chondrosarcoma is closely associated with tumor location, size, removal methods and biological characteristics.
    OBJECTIVE: To explore the choice of reconstruction materials for bone defects after chondrosarcoma resection based on the retrospective analysis of different resection methods.
    METHODS: We retrospectively analyzed clinical data from 82 cases of chondrosarcoma who had received hondrosarcoma resection at the Department of Orthopedics, Changzhen Hospital of Second Military Medical University from January 1999 to January 2010. All the involved patients were confirmed pathologically as having chondrosarcoma, including 51 males and 31 females, with a mean age of 39.8 years (range, 15-68 years). Chondrosarcoma was found in the pelvis (n=26), spine (n=19), femur (n=19), tibia and fibula (n=8), and shoulder (including the humerus) (n=12). Preoperative X-ray, MRI or CT was taken as well as ECT. Clinical data, resection methods, and follow-up results were collected for multivariate analysis to screen the possible prognostic factors of chondrosarcoma.
    RESULTS AND CONCLUSION: For chondrosarcoma, different types of resection result in a quite difference in recurrence rates, metastasis and mortality rates. The initial resection which is done outside the boundaries can significantly reduce the recurrence rate, metastasis rate and mortality. Autogenous bone, allograft bone, and prosthetic reconstruction materials are effective for functional reconstruction. Autologous bone graft is limited clinically because of its limited sources and complications at donor site. Allograft or prosthetic reconstruction of bone defects is an effective method. Limited number of clinical cases reported makes it difficult to determine the pros and cons of different reconstruction materials. The need for reconstruction depends on the defect site and size, and reconstruction method depends on the type of resection. The important criteria for the choice of reconstruction materials include both form and functional repair of bone defects, chondrosarcoma type and the patient’s request.

    Figures and Tables | References | Related Articles | Metrics
    Medial versus lateral locking plate for fixation of distal tibial fractures
    Xie Jing-jing, Song Xuan, Wang Zhan-chao, Chen Yu, Liu Chang-hai, Zhou Qiang, Lu Hua
    2013, 17 (43):  7636-7641.  doi: 10.3969/j.issn.2095-4344.2013.43.021
    Abstract ( 1432 )   PDF (841KB) ( 595 )   Save

    BACKGROUND: With the increasing incidence of distal tibial fractures, locking plate fixation has become the preferred internal fixation method.
    OBJECTIVE: To analyze the biomechanical performance of distal tibial fractures, and to study the difference between medial and lateral locking plate methods for internal fixation of distal tibial fractures.
    METHODS: Articles concerning the biomechanics of the internal fixation of distal tibial fractures were collected by literature search. The articles that met the criteria were analyzed in depth. In this paper, a biomechanical comparison between locking plate fixation and intramedullary nail fixation was done as well as the stress distribution and mechanism of the ankle joint. Meanwhile, 60 patients with distal tibial fractures who had received medial or lateral locking plate fixation at the Department of Orthopedics, Chongming Branch, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, China from January 2009 to January 2012 were enrolled for efficiency comparison.
    RESULTS AND CONCLUSION: For patients with distal tibial fractures, it is easy to cause posterior malleolus fractures, Y-shaped fractures and anterior tibial compression, respectively, in the plantar flexion position, neutral position, and dorsiflexion position. Locking plate is better than the intramedullary nail in the torsional force, and the intact fibula contributes to the improvement of fixed effects of these two internal fixation methods. When the fibula cannot be effectively fixed, the locking plate fixation has a better stability than the intramedullary nail.Moreover, there is no difference in the fracture healing after fixation with medial and lateral locking plates. However, a lower incidence of complications and better function recovery of the ankle joint can be realized after lateral locking plate fixation.

    Figures and Tables | References | Related Articles | Metrics
    Influencing factors of fixation strength of pedicle screws
    Yin Jian-xin
    2013, 17 (43):  7642-7647.  doi: 10.3969/j.issn.2095-4344.2013.43.022
    Abstract ( 364 )   PDF (756KB) ( 523 )   Save

    BACKGROUND: Pedicle screw is a good means for internal fixation and has been widely used in clinical practice.
    OBJECTIVE: To explore the factors influencing the fixation strength of pedicle screws, and to provide biomechanical basis for clinical selection of pedicle screws.
    METHODS: The recently published studies addressing the biomechanics of pedicle screws were retrieved, and those focusing on the influence of pedicle screw geometry, implantation technique, pedicle anatomical factor, vertebral bone density, screw manufacturing process and material properties on the fixation strength of pedicle screws were retrospectively analyzed, thus providing theoretical basis for clinical treatment.
    RESULTS AND CONCLUSION: Results showed that, the appearances of pedicle screws such as screw size, screw thread form and fatigue property are the main factors associated with the fixation strength, in addition, vertebral bone density, screw manufacturing process and material properties cannot be ignored. The screw withdrawal force and stability can be improved by increasing screw diameter, improving screw design, strengthening bone density, and modifying operations.

    Figures and Tables | References | Related Articles | Metrics
    Association between knee joint medial meniscus extrusion and posterior root tears: Magnetic resonance imaging analysis
    Li Fei, Zhang Jun, Wang Feng-zhe,Pan Shi-nong
    2013, 17 (43):  7648-7653.  doi: 10.3969/j.issn.2095-4344.2013.43.023
    Abstract ( 707 )   PDF (696KB) ( 500 )   Save

    BACKGROUND: Meniscal root damage is an important reason for meniscus extrusion. In recent years, there are many reports on the relationship between meniscus root injury and meniscus extrusion at abroad, but it is rare at home.
    OBJECTIVE: To investigate the correlation between knee medial meniscus extrusion and the medial meniscus posterior root tears.
    METHODS: A retrospective analysis of the MRI and arthroscopic findings of 84 patients with knee medial meniscus extrusion signs was conducted. Medial meniscus extrusion≥ 3 mm or length of medial meniscus extrusion/maximum diameter of meniscus extrusion ≥10% was defined as serious extrusion. The chi-square test analysis was used to analyze the correlation between posterior root tears and the medial meniscus extrusion.
    RESULTS AND CONCLUSION: MRI measurement results of medial meniscus extrusion (length of medial meniscus extrusion ≥ 3 mm or length of medial meniscus extrusion/maximum diameter of meniscus extrusion ≥ 10%) was significantly related with the arthroscopic findings of posterior root tears (P < 0.05) with the odds ratio and 95% confidence intervals of 25.04 (3.07-204.44) and 6.96 (1.38-35.19) respectively. The medial meniscus serious extrusion is closely related to posterior root tears of the medial meniscus, which is a significant feature of the meniscus posterior root tears.

    Figures and Tables | References | Related Articles | Metrics
    Glucosamine hydrochloride combined with celecoxib for the treatment of knee osteoarthritis: Randomized controlled trials
    Li Ming-hui, Liu Yang, Wang Cai-min, You Hao, Huang Liang, Sun Kai
    2013, 17 (43):  7654-7660.  doi: 10.3969/j.issn.2095-4344.2013.43.024
    Abstract ( 573 )   PDF (609KB) ( 627 )   Save

    BACKGROUND: Glucosamine hydrochloride is considered to have the role in the treatment of knee osteoarthritis. Whether it is effective for varying degrees of osteoarthritis and whether there are efficacy differences between the combinations nonsteroidal anti-inflammatory drugs and simple glucosamine hydrochloride need further clinical research.
    OBJECTIVE: To compare the clinical effects between glucosamine hydrochloride capsules and combined with celecoxib for the treatment of knee osteoarthritis through prospective study.
    METHODS: According to Lequesne score, 152 patients with knee osteoarthritis were divided into mild, moderate and severe groups, then each group was divided into groups treated just by glucosamine hydrochloride and groups treated by glucosamine hydrochloride combined with celecoxib randomly. The Lequesne score was recorded at 2, 4 and 6 weeks after drug administration and 8 and 12 weeks after drug withdrawal, and then the adverse reactions of glucosamine hydrochloride were compared between groups and before and after treatment.
    RESULTS AND CONCLUSION: In the mild group, there was significant difference in Lequesne score of glucosamine hydrochloride group at 4 weeks after treatment and 12 weeks after drug withdrawal when compared with that before treatment; the Lequesne score was improved in the combined group at 2 weeks after treatment, and there was significant difference between two groups at 2 and 4 weeks after treatment, it showed that the combined group improved the score, which was more significant than the glucosamine hydrochloride group. In the moderate group, the Lequesne score in the glucosamine hydrochloride group was lower than that in the combined group at 2, 4 and 6 weeks after treatment and 8 weeks after drug withdrawal (P < 0.05). It showed that the effect of glucosamine hydrochloride combined with celecoxib for the treatment of medium knee osteoarthritis was better than that of glucosamine hydrochloride. In the serious group, there was no significant difference in Lequesne score between two groups before and after treatment. The results indicate that the clinical symptoms of mild knee osteoarthritis patients can be significantly improved by a single use of glucosamine hydrochloride. To moderate osteoarthritis, combination therapy with nonsteroidal anti-inflammatory drugs is recommended to improve clinical symptoms, and both of the two methods are invalid on severe knee osteoarthritis patients.

    Figures and Tables | References | Related Articles | Metrics