Evaluation of design parameters of osseointegrated dental implants using finite element analysis
Evaluation of design parameters of osseointegrated dental implants using finite element analysis
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DOI：
10.1046/j.1365-2842.2002.00891.x
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发表时间：
2002-06-01
影响因子：
2.9
通讯作者：
Kim, MH
中科院分区：
文献类型：
--
作者：
Chun, HJ;Cheong, SY;Kim, MH
对不同形状的牙种植体进行有限元分析，以研究其对周围颌骨应力分布的影响，并确定最佳螺纹形状以均匀应力分布。结果发现，方形螺纹形状圆角与一个小半径是更有效的应力分布比其他牙科种植体中使用的分析。对具有从先前分析中获得的螺纹形状的植入物进行额外分析，以改变其他设计参数，例如不同载荷方向的螺纹端部宽度和螺纹高度，以确定植入物的最佳尺寸。当螺纹端部宽度和螺纹高度分别为0.5p和0.46p（p为螺距）时，应力分布更有效。然后，使用先前确定的最佳种植体螺纹尺寸，对不同螺距和种植体长度进行应力分析，以研究对应力分布的影响，并找到降低颌骨中产生的最大有效应力的方法。结果表明，最大有效应力不仅随着螺距的逐渐减小而减小，而且随着种植体长度的增加而减小。
Finite element analyses were performed for various shapes of dental implant to study effects on stress distribution generated in the surrounding jaw bone and to determine an optimal thread shape for even stress distribution. It was found that the square thread shape filleted with a small radius was more effective on stress distribution than other dental implants used in the analyses. Additional analyses were performed on the implant with the thread shape obtained from previous analyses for varying other design parameters, such as the width of thread end and height of thread for various load directions, to determine the optimal dimensions of the implant. Stress distribution was more effective in the case when the width of thread end and the height of thread were 0.5p and 0.46p, respectively, where p is the screw pitch. Then, using the optimal implant thread dimensions determined previously, stress analyses were performed with various screw pitches and implant lengths, to investigate effects on stress distribution and to find the way to reduce the maximum effective stress generated in the jaw bone. Results show that the maximum effective stress decreased not only as screw pitch decreased gradually but also as implant length increased.