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KMID : 1004520120280020127
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Journal of Dental Rehabilitation and Applied Science
2012 Volume.28 No. 2 p.127 ~ p.138
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Effect of Implant Preload on the Marginal Bone Stresses Studied by Three Dimensional Finite Element Aanalysis
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Nam Hyo-Jun
Jo Kwang-Hun
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Abstract
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This study is to assess the effect of preload level on the stress development at the marginal cortical bone surrounding
implant neck. A finite element model was created for a single implant placed in the lower jaw bone. An external load of 100N was applied on the top of abutment at 30 degree with the implant axis in lingo-buccal direction. Five different preloads, i.e. 0, 200, 400, 600, 800N were applied to the abutment stem to investigate if and/or how the preload affects on the marginal bone stress. Differences in the marginal bone stress were recorded depending on the level of preload. On the other hand, the tensile stress on the marginal cortical bone decreased in models of higher preload. Preloads between abutment/fixture can increase compressive stresses in the marginal cortical bone although the amount may be insignificant as compared to those generated by functional forces.
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KEYWORD
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abutment, fixture, implant, marginal bone, preload, stress development
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