Journal of Oral Science
Online ISSN : 1880-4926
Print ISSN : 1343-4934
ISSN-L : 1343-4934
Original
Three-dimensional finite element analysis of the effects of implant diameter and photofunctionalization on peri-implant stress
Tetsuo OhyamaHiroyasu YasudaNorio ShibuyaSatomi TadokoroShinya NakabayashiShunsuke NamakiYaeko HaraTakahiro OgawaTomohiko Ishigami
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JOURNAL FREE ACCESS

2017 Volume 59 Issue 2 Pages 273-278

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Abstract

Previous finite element analyses of peri-implant stress assumed a bone-implant contact (BIC) ratio of 100%, even though the BIC ratio is known to be approximately 50% or less. However, the recent development of ultraviolet treatment of titanium immediately before use, known as photofunctionalization, significantly increased the BIC ratio, to 98.2%. We used a unique finite element analysis model that enabled us to examine the effects of different BIC ratios on peri-implant stress. A three-dimensional model was constructed under conditions of vertical or oblique loading, an implant diameter of 3.3, 3.75, or 5.0 mm, and a BIC ratio of 53.0% or 98.2%. Photofunctionalization and larger implant diameters were associated with reduced stress on surrounding tissues. Under vertical loading, photofunctionalization had a greater effect than increased implant diameter on stress reduction. Under oblique loading, increased implant diameter had a greater effect than photofunctionalization on stress reduction.

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© 2017 by Nihon University School of Dentistry
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