种植体植入不同角度的应力分析：有限元法
Stress analysis of different angulations of implant installation: the finite element method.
作者信息
Lan Ting-Hsun, Huang Heng-Li, Wu Ju-Hui, Lee Huey-Er, Wang Chau-Hsiang
机构信息
Department of Prosthodontics, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.
出版信息
Kaohsiung J Med Sci. 2008 Mar;24(3):138-43. doi: 10.1016/S1607-551X(08)70141-4.
Abstract
Clinically, many implant cases with different angulation over the lower posterior area have been found. The purpose of this study was to analyze the bony stress with different implant tilting during normal masticatory load using the finite element method (FEM), with the hope of discovering a desirable installation of implant. A three-dimensional finite element method was employed to analyze the bony stress generated by different angulation designs (15 degrees) of implant bodies. Eight solid models of the mandibular first and second molars were built up and then transferred to a mesh model in FEM (ANSYS) to perform a stress analysis. A simulated load (400 N) was applied to the splinted crowns with vertical and horizontal forces. The loading sites were on the central fossa of the splinted crowns. For stress distribution, some designs will be better than a parallel installation. The results suggested that not all implant bodies tilting with the splinted crowns lead to stress concentration.
摘要
临床上，已发现许多在下颌后牙区具有不同角度的种植病例。本研究的目的是使用有限元方法（FEM）分析在正常咀嚼负荷下不同种植体倾斜角度时的骨应力，以期发现理想的种植体植入方式。采用三维有限元方法分析种植体不同角度设计（15度）产生的骨应力。构建了下颌第一和第二磨牙的八个实体模型，然后将其转换为有限元法（ANSYS）中的网格模型以进行应力分析。将模拟载荷（400 N）以垂直和水平力施加于联冠。加载部位位于联冠的中央窝。对于应力分布，某些设计将优于平行植入。结果表明，并非所有与联冠倾斜的种植体都会导致应力集中。
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