Science Links Japan | Stress Analysis of Hydroxyapatite Coated Implant by Finite Element Method. Influences of Thickness and Young's Modulus of Apatite Layer.

Stress Analysis of Hydroxyapatite Coated Implant by Finite Element Method. Influences of Thickness and Young's Modulus of Apatite Layer.

Accession number;01A1027771

Title;Stress Analysis of Hydroxyapatite Coated Implant by Finite Element Method. Influences of Thickness and Young's Modulus of Apatite Layer.

Author; TANIMOTO YASUHIRO (Nihondai Matsudoshi Shikarikogaku) YASUDA SEIJIRO (Nihondai Matsudoshi Shikarikogaku) HAYAKAWA TOORU (Nihondai Matsudoshi Shikarikogaku) NEMOTO KIMIYA (Nihondai Matsudoshi Shikarikogaku)

Journal Title;Nippon Koku Inpuranto Gakkaishi

Journal Code:G0262C

ISSN:0914-6695

VOL.14;NO.3;PAGE.414-422(2001)

Figure&Table&Reference;FIG.12, REF.27

Pub. Country;Japan

Language;Japanese

Abstract;It is widely known that hydroxyapatite coated implants show a better bone response than titanium implants. However, some shortcomings of hydroxyapatite coated implants, produced by plasma spraying, were reported. A thin physical vapor deposition technique was introduced to overcome such shortcomings. It was reported that thin-hydroxyapatite coated implants showed good biological behaviors in animal experiments or cell culture experiments. But there have been a few reports related to the mechanical behavior of thin coated implants, for example stress distribution around the implants under oral functioning conditions. The finite element method (FEM) is a powerful tool to analyze the stress distribution on an implant. The purpose of this study was to investigate the influence of thickness and Young's modulus of a hydroxyapatite coated layer on the stress distribution around the implant by the finite element method. Two finite element models were proposed to simulate the mechanical behavior of implant. One finite element model is called a macro-model. The macro-model is composed of a titanium implant, a hydroxyapatite coating, a cortical bond, and trabecular bone. The goal of the calculation of the macro-model is to simulate the whole stress distribution of the coated implant, including the surrounding bone. The other finite element model is called a micro-model. The micro-model is composed of a titanium implant, a hydroxyapatite coated layer, and cortical bone. The thickness of the coating layer was 5 or 100.MU.m. The micro-model is calculated in order to obtain the details of the stress distribution on the implant. Using these models, the influences of thickness and Young's modulus of the hydroxyapatite coated layer on stress distribution around implant, were discussed. The results were as follows: 1. A vertical load of 100 N was applied on the top of the implants.... (author abst.)

Related Articles;