The Dynamics in Implantation for Patients with Clefts
The Dynamics in Implantation for Patients with Clefts
复制标题
唇裂患者植入的动力学
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
T. Nakajima
中科院分区：
文献类型：
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作者：
T. Nagasao;J. Miyamoto;Hongmei Jin;T. Tamaki;Y. Isshiki;T. Kaneko;T. Nakajima
目的建立不同类型腭裂患者骨内种植体的有限元模型，研究骨内种植体的应力和应变。材料与方法根据7个干燥颅骨的CT切片数据，在PC机上设计7个上颌骨三维模型。接下来，对每个模型进行计算机辅助修改，以产生具有不同裂缝图案的另外三个3D模型。因此，设计了四种具有不同裂隙模式的模型类型，并将其称为NORM（无裂隙）、ALVEOLAR（仅齿槽裂隙）、PALATAL（仅腭裂隙）和COMPLENT（完全裂隙）。将种植体嵌入每个模型的磨牙区域，施加300 N垂直载荷和50 N水平载荷以模拟咀嚼。在这些条件下，发生在种植体-骨界面的应力通过有限元分析计算。结果有腭裂（PALATAL）和无腭裂（NORM和ALVEOLAR）模型之间观察到不同的应力模式。在垂直载荷作用下，腭型和复合型的应力大于正常型和牙槽型。在水平荷载作用下，虽然应力没有表现出数量上的差异，但它们的矢量模式不同。结论腭裂患者在咀嚼过程中，骨-种植体界面存在特征性的应力模式。在对唇腭裂患者进行种植体治疗时，应考虑到这一点。
Objective To investigate the stresses and strains of an endosseous dental implant in patients with different types of cleft palate in a finite element model. Materials and Methods Seven three-dimensional (3D) maxillary models were designed on a personal computer according to computed tomography slice data obtained from seven dry skulls. Next, computer-aided modification was performed on each model to produce three other 3D models with different cleft patterns. Thus, four model types with different cleft patterns were designed and termed NORM (without cleft), ALVEOLAR (only alveolar cleft), PALATAL (only palatal cleft), and COMPLETE (complete cleft). An implant was embedded into the molar region of each model, and a 300-N vertical load and 50-N horizontal load were applied to simulate mastication. Under these conditions, the stresses occurring at the implant-bone interface were calculated by finite element analysis. Results Different stress patterns were observed between the models with a palatal cleft (PALATAL and COMPLETE) and those without palatal cleft (NORM and ALVEOLAR). Regarding vertical load application, greater stresses occurred in PALATAL and COMPLETE types than in NORM and ALVEOLAR types. On application of a horizontal load, though the stresses did not show quantitative difference, their vector patterns differed. Conclusion In patients with palatal clefts, characteristic stress patterns occur on the bone-implant interface during mastication. This should be taken into consideration when performing an implant treatment in patients with clefts.
DOI：
10.1016/0267-6605(92)90049-y
发表时间：
1992-01-01
期刊：
Clinical Materials
影响因子：
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作者：
BRUNSKI J B
通讯作者：
BRUNSKI J B