Numeric approach to the biomechanical analysis of thermal effects in coated implants.
Numeric approach to the biomechanical analysis of thermal effects in coated implants.
复制标题
涂层植入物热效应生物力学分析的数值方法。
DOI：
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复制
发表时间：
1993
影响因子：
2.3
通讯作者：
Y. Terada
中科院分区：
文献类型：
--
作者：
H. Moroi;K. Okimoto;R. Moroi;Y. Terada
使用二维有限元方法来检查材料选择和种植体涂层的骨上暴露对热和机械应力分布的影响。羟基磷灰石涂层由于其低导热率而减少了对周围组织的热传导。然而，羟基磷灰石和钛芯的热膨胀会产生热应力。这可能会影响羟基磷灰石涂层植入物的成功，因为陶瓷的生物力学性能对于拉伸和剪切应力来说非常差。此外，当羟基磷灰石涂层表面延伸超出皮质骨时，这种趋势变得更加明显。
A two-dimensional, finite element method was used to examine the influence of material selection and suprabony exposure of the implant coating on thermal and mechanical stress distribution. Hydroxyapatite coating reduced the heat conduction to the surrounding tissue because of its low thermal conductivity. However, thermal stress resulted from thermal expansion of the hydroxyapatite and titanium core. This might influence the success of hydroxyapatite-coated implants because the biomechanical properties of ceramics are so poor for tensile and shearing stress. In addition, this tendency becomes more pronounced when the hydroxyapatite coating surface extends beyond the cortical bone.