Effect of coating thickness and its material on the stress distribution for dental implants

被引：23
作者：
Production Engineering and Mechanical Design Department, Faculty of Engineering, Mansoura University, Mansoura, Egypt [1 ]
机构：
[1] Production Engineering and Mechanical Design Department, Faculty of Engineering, Mansoura University, Mansoura
来源：
J. Med. Eng. Technol. | 2007年 / 4卷 / 280-287期
关键词：
Coating; Collagen; Functionally-graded material; Porosity; Titanium; Von Mises stress;
D O I：
10.1080/03091900600861616
中图分类号：
学科分类号：
摘要：
Dental implants have been increasingly used to recover the masticatory function of lost teeth. It has been well known that the success of a dental implant is heavily dependent on initial stability and long-term osseointegration due to optimal stress distribution in the surrounding bones by the concept implant surface coating. Hydroxyapatite (HAP), as a coating material, has been widely used in dentistry due to its biocompatibility. Some investigations show a benefit of coating dental implants with HAP, and others concluded that HAP coating reduces the long-term implant survival. Therefore, the aim of this investigation is to design a new functionally graded dental implant coating, as well as studying the effect of coating thickness on the maximum von Mises stresses in bone adjacent to the coating layer. The gradation of the elastic modulus is changed along the longitudinal direction. Stress analysis using a finite element method showed that using a coating thickness of 150 μm, functionally graded from titanium at the apex to the collagen at the root, will successfully reduce the maximum von Mises stress in bone by 19% and 17% compared to collagen and HAP coating respectively. © 2007 Informa UK Ltd.
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页码：280 / 287
页数：7
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