中国组织工程研究

中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (43): 6966-6972.doi: 10.3969/j.issn.2095-4344.2014.43.013

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

纤维桩长度和牙槽骨高度对上颌中切牙抗折性能的影响

李晓杰，胡书海，任  翔，左恩俊   

  1. 大连医科大学口腔医学院，辽宁省大连市  116044
  • 收稿日期:2014-09-16 出版日期:2014-10-15 发布日期:2014-10-15
  • 通讯作者: 左恩俊，硕士，主治医师，大连医科大学口腔医学院，辽宁省大连市 116044
  • 作者简介:李晓杰，女，1978年生，辽宁省大连市人，满族，2005年大连医科大学毕业，硕士，讲师，主治医师，主要从事口腔修复学基础和临床方面研究。
  • 基金资助:

    辽宁省科技厅科学事业公益研究基金(2013001007)

Effect of alveolar bone height and fiber post length on the fracture resistance of endodontically treated maxillary central incisors

Li Xiao-jie, Hu Shu-hai, Ren Xiang, Zuo En-jun   

  1. College of Stomatology, Dalian Medical University, Dalian 116044, Liaoning Province, China
  • Received:2014-09-16 Online:2014-10-15 Published:2014-10-15
  • Contact: Zuo En-jun, Master, Attending physician, College of Stomatology, Dalian Medical University, Dalian 116044, Liaoning Province, China
  • About author:Li Xiao-jie, Master, Lecturer, Attending physician, College of Stomatology, Dalian Medical University, Dalian 116044, Liaoning Province, China
  • Supported by:

    the Public-Service Foundation for Scientific Development of Liaoning Department of Science and Technology, No. 2013001007

PDF

774

被引次数

2

摘要：

背景：纤维桩具有与天然牙本质接近的弹性模量，在受外力时能够与根管壁保持广泛面接触，与牙本质形成一同质的整体，使应力沿根管壁均匀传导，减少根折的发生。
目的：观察牙槽骨高度和纤维桩长度对上颌中切牙抗折性能的影响。
方法：将48颗离体上颌中切牙随机分为6组，每组8颗。A，B，C组牙槽骨距离釉质牙骨质界的距离为2 mm，纤维桩长度分别为5，7，9 mm；D，E，F组牙槽骨距离釉质牙骨质界的距离为5 mm，纤维桩长度分别为5，7，9 mm。截冠、根管治疗、纤维桩树脂核及铸造金属全冠修复后，将试样牙置于电子万能试验机上，与牙体长轴呈45?的加载方向，以1 mm/min的加载速度，持续加载至试样牙发生折裂。记录折裂时的加载强度和折裂模式。
结果与结论：牙槽骨高度对试样牙的抗折性能有显著影响(F=560.943，P < 0.05)；纤维桩长度对试样牙的抗折性能没有显著影响(P > 0.05)。牙槽骨高度正常各组试样牙断裂模式多为可修复性断裂模式，牙槽骨高度降低各组试样牙断裂模式多为不可修复性断裂模式，差异有显著性意义(χ2=5.689，P < 0.05)。说明在牙槽骨高度降低的情况下，增加纤维桩的长度不能提高牙齿的抗折性能。


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


全文链接：

关键词: 生物材料, 口腔生物材料, 牙槽骨, 纤维桩, 根管治疗, 抗折性能, 弹性模量, 上颌中切牙, 釉牙骨质界, 牙冠延长术, 高度, 长度

Abstract:

BACKGROUND: The elastic modulus of the fiber post is close to that of the dentine, so it can form a homogeneous whole and share the masticatory force, which can ease the stress concentration of dentine and prevent from tooth fracture.
OBJECTIVE: To investigate the effect of alveolar bone height and fiber post length on the fracture resistance of endodontically treated maxillary central incisors.
METHODS: Forty-eight human maxillary central incisors were assigned randomly to six groups (n=8) of three different post insertion depths (5, 7, 9 mm) and two alveolar bone levels (2 and 5 mm) from the cement-enamel junction. All of them were restored by glass fiber posts with composite resin core and cast metal crown. The samples were loaded in a testing machine with a crosshead speed of 1 mm/min at a 45° angle to the long axis of the tooth on the palatal surfaces until tooth fracture occurred. The maximum load and failure mode were recorded.
RESULTS AND CONCLUSION: Alveolar bone height had a significant influence on the fracture resistance (F=560.943, P > 0.05), but fiber post length did not have a significant influence on it (P > 0.05). Significant differences were found between the normal and resorbed alveolar bone groups in the number of repairable fracture patterns (χ2=5.689, P < 0.05). Under the circumstance of lowered alveolar bone height, lengthening fiber post cannot enhance fracture resistance of the teeth.


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


全文链接：

Key words: tooth, root canal therapy, post and core technique

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