不同框架材料种植支撑上颌义齿两种种植概念间应力分布的有限元研究。

Sergen Kilic, Ipek Caglar
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引用次数: 0

摘要

目的:本研究的目的是通过有限元分析比较全上四和全上六治疗理念在不同义肢框架材料下的应力分布。材料与方法:利用计算机地形数据模拟无牙上颌三维有限元模型。根据All-on - Four概念放置4个植入物。除了全上4个概念外,在前区放置另外两个轴向种植体以创建全上6个概念。研究了四种框架材料:钴铬(CoCr)、锆(Zr)、钛(Ti)和聚醚醚酮(PEEK)。在前牙区同时施加100 N的负荷,在前牙区同时施加150 N的斜向负荷,在磨牙区同时施加200 N的斜向负荷。计算并比较骨内主应力、种植体和框架内的Von Mises应力。结果:全上六概念比全上四概念具有更低的种植体、框架的von Mises和骨上的主应力值。PEEK对骨和种植体的应力值最高,而CoCr的应力值最小。结论:应力分布受骨架材料的影响。在正确的适应症下使用具有适当物理特性的框架材料可能对确定种植体支持假体的成功尤其重要。
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An Investigation of Stress Distribution Between Two Different Implant Concept in Implant-Supported Maxillary Prostheses with Different Framework Materials: A Finite Element Study.

Purpose: The purpose of this study is to compare the stress distribution between all-on four and all-on six treatment concept with various prosthetics framework materials through finite element analysis.

Materials and methods: A three-dimensional finite element model of edentulous maxilla was simulated using computerized topographical data of a patient. Four implants were placed according to All-on four concept. In addition to the all-on four concept, two more axial implants were placed in anterior region to create the all-on six concept. Four framework materials were investigated: Cobalt-Chrome (CoCr), Zirconium (Zr), Titanium (Ti) and Polyetheretherketone (PEEK). 100 N load was applied at anterior region, 150 N oblique load was applied at premolars and 200 N oblique load was applied at molars region simultaneously. Principal stresses in bone, the Von Mises stresses in implant and frameworks were calculated and compared.

Results: All-on six concept showed lower von Mises on implant, and framework, and principal stress values on the bone, than all-on four concept. PEEK exhibited highest stress values on bone and implants, while CoCr showed least stress values.

Conclusion: Stress distribution was influenced by the framework materials. The use of framework material with appropriate physical properties on the correct indication might be particularly important in determining the success of the implant-supported prostheses.

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