假体周围
冯·米塞斯屈服准则
应力屏蔽
口腔正畸科
生物力学
生物医学工程
有限元法
医学
皮质骨
关节置换术
解剖
植入
外科
结构工程
工程类
作者
Byung Woo Cho,Kyoung‐Tak Kang,Hyuck Min Kwon,Woo Suk Lee,Ick Hwan Yang,Ji Hyung Nam,Yong‐Gon Koh,Kwan K. Park
出处
期刊:Bone and Joint Research
[British Editorial Society of Bone and Joint Surgery]
日期:2022-05-01
卷期号:11 (5): 252-259
被引量:3
标识
DOI:10.1302/2046-3758.115.bjr-2021-0537.r1
摘要
This study aimed to identify the effect of anatomical tibial component (ATC) design on load distribution in the periprosthetic tibial bone of Koreans using finite element analysis (FEA).3D finite element models of 30 tibiae in Korean women were created. A symmetric tibial component (STC, NexGen LPS-Flex) and an ATC (Persona) were used in surgical simulation. We compared the FEA measurements (von Mises stress and principal strains) around the stem tip and in the medial half of the proximal tibial bone, as well as the distance from the distal stem tip to the shortest anteromedial cortical bone. Correlations between this distance and FEA measurements were then analyzed.The distance from the distal stem tip to the shortest cortical bone showed no statistically significant difference between implants. However, the peak von Mises stress around the distal stem tip was higher with STC than with ATC. In the medial half of the proximal tibial bone: 1) the mean von Mises stress, maximum principal strain, and minimum principal strain were higher with ATC; 2) ATC showed a positive correlation between the distance and mean von Mises stress; 3) ATC showed a negative correlation between the distance and mean minimum principal strain; and 4) STC showed no correlation between the distance and mean measurements.Implant design affects the load distribution on the periprosthetic tibial bone, and ATC can be more advantageous in preventing stress-shielding than STC. However, under certain circumstances with short distances, the advantage of ATC may be offset. Cite this article: Bone Joint Res 2022;11(5):252-259.
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