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KMID : 1004520130290030259
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Journal of Dental Rehabilitation and Applied Science
2013 Volume.29 No. 3 p.259 ~ p.271
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Finite Element Stress Analysis of Bone Tissue According to the Implant Connection Type
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Byun Ook
Jung Da-Un
Han In-Hae
Kim Seong-Ryang
Lee Chang-Hee
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Abstract
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The purpose of this study was to make the stress distribution produced by simulated different load under two types of internal connection implant system (stepped and tapered type) by means of 3D finite element analysis,The finite element model was designed with the parallel placement of the one fixtures (4.0 mm×11.5 mm) with reverse buttress thread on the mandibular 1st molar. Two models were loaded with 200 N magnitude in the vertical direction on the central position of the crown, the 1.5mm and 3 mm buccal offset point from the central position of the fixture. The oblique load was applied at the angle of 30??on the crown surface. Von Mises stress value was recorded and compared in the fixture-bone interface in the bucco-lingual dimension. The results were as follows;1. The loading conditions of two internal connection implant systems (stepped and tapered type) were the main factor affecting the equivalent bone strain, followed by the type of internal connections. 2. The stepped model had more mechanical stability with the reduced max. stress compared to 11??tapered models under the distributed oblique loading. 3. The more the contact of implant-abutment interface to the inner wall of implant fixture, the less stress concentration was reduced.
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KEYWORD
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Finite element analysis, Internal connection implant system, Oblique load, von Mises stress
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