Influence of Implant Position on Stress Distribution in Implant-Assisted Distal Extension Removable Partial Dentures: A 3D Finite Element Analysis
Influence of Implant Position on Stress Distribution in Implant-Assisted Distal Extension Removable Partial Dentures: A 3D Finite Element Analysis
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种植体位置对种植体辅助远端延伸可摘局部义齿应力分布的影响：3D 有限元分析
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Yasaman Mansouri
中科院分区：
文献类型：
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作者：
Y. Memari;A. Geramy;Amir Fayaz;Shirin Rezvani Habib Abadi;Yasaman Mansouri
目的：远端伸展可摘局部义齿是一种缺乏远中牙体支持的义齿，其黏膜和牙周膜之间的弹性相差13倍，在压力作用下产生杠杆作用。它可能会对基牙和周围组织造成潜在的破坏。本研究的目的是评估种植体位置对远中延伸种植体辅助可摘局部义齿的应力分布的影响。材料和方法：设计双侧远中伸部下颌部分无牙弓模型，包括双侧前牙和第一前磨牙、义齿和种植体(4×10 mm)。借助于有限元程序ANSYS8.0，对模型进行网格划分，并在每个尖端施加10N的严格垂直力。绘制了位移图和冯·米塞斯图以可视化结果。结果：种植体放置在第二前磨牙区时，种植体、基牙和松质骨应力最大。第一磨牙区种植体和骨应力最低。结论：在所分析的模型中，位于第一磨牙区域的种植体的应力分布最小。
Objective: Distal extension removable partial denture is a prosthesis with lack of distal dental support with a 13-fold difference in resiliency between the mucosa and the periodontal ligament, resulting in leverage during compression forces. It may be potentially destructive to the abutments and the surrounding tissues. The aim of this study was to assess the effect of implant location on stress distribution, in distal extension implant assisted removable partial dentures. Materials and Methods: Three-dimensional models of a bilateral distal extension partially edentulous mandible containing anterior teeth and first premolar in both sides of the arch, a partial removable denture and an implant (4×10mm) were designed. With the aid of the finite element program ANSYS 8.0, the models were meshed and strictly vertical forces of 10 N were applied to each cusp tip. Displacement and von Mises Maps were plotted for visualization of results. Results: When an implant was placed in the second premolar region, the highest stress on implant, abutment tooth and cancellous bone was shown. The lowest stress was shown on implant and bone in the 1st molar area. Conclusion: Implants located in the first molar area showed the least distribution of stresses in the analyzed models.