摘要/Abstract

摘要： 目的 ·对新型锚固钉及其抗力性进行评估。方法 ·实验包括拉力测试和有限元分析 2个部分。在第一个部分，分别将传统锚固钉和新型锚固钉植入髁突皮质骨，使用拉力机对其进行拉力测试；第二个部分，建立植入新型锚固钉后的下颌髁突三维有限元模型，并从 3个不同方向施加力的作用，进行三维有限元分析。结果 ·三维有限元分析表明，传统锚固钉和新型锚固钉所能承受的最小拔出力分别为 48.2 N和 200.0 N；配合 3-0缝线使用的传统和新型锚固钉在抗拉强度上比较，差异具有统计学意义（ P0.033）；此外， 3-0缝线的传统锚固钉与 2-0缝线的新型锚固钉相比，差异也具有统计学意义（P0.000）。结论 ·相比传统锚固钉，新型锚固钉抗力性能更佳，配合使用 2-0缝线时尤其明显。
关键词: 颞下颌关节锚固术, 下颌髁突, 锚固钉, 锚固线, 张力测试, 有限元分析
Abstract:
Objective · To estimate resistance ability of improved anchor screw. Methods · The experiment consisted of two sections: tensile test and finite element analysis (FEA). In the first part, the traditional anchor screw and the improved anchor screw were implanted into the condylar cortical bone, respectively, tensile force was testedtension machine. In the second part, the three-dimensional finite element model of mandibular condyle was established after the improved anchor screw was implanted, and the FEA was performedthe force applied three different directions. Results · The FEA results revealed the minimum force of the traditional and improved anchor screws were 48.2 N and 200.0 N, respectively. The tensile strengths of the traditional and improved anchor screws with a 3-0 suture were significantly different (P0.033). The difference between the traditional anchor screw (3-0 suture) and the improved anchor screw (2-0 suture) were significantly different (P0.000). Conclusion · Compared with traditional screw, improved anchor screw has better resistance ability, especially combined with 2-0 suture.
Key words: temporal mandibularjoint anchorage, mandibular condyle, anchorscrew, suture, tensile test, finite element analysis (FEA)


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