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KMID : 1004520100260030297
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Journal of Dental Rehabilitation and Applied Science
2010 Volume.26 No. 3 p.297 ~ p.309
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Fracture Analysis of Implant Components using Scanning Electron Microscope. Part I : Implant Fixture
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Lim Kwang-Gil
Kim Dae-Gon
Cho Lee-Ra
Park Chan-Jin
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Abstract
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The objective of the present study was to perform a fracture analysis on fractured implant fixture after use in vivo and
make clear the cause & mechanisms of failure. In case of fatigue fracture, the fractured surface represents fatigue striation.
Fatigue striation indicate the progression of the crack front under cyclic loading, are characteristic of stage 2 crack growth.
The site of crack initiation and stage 1 crack growth were not easily identified in any of the failure, presumably because
of the complex microstructural features of the polycrystalline sample. In case of fractured by overload, dimpled or cleavage surface were observed. Using the interpretation of characteristic markings(ratchet mark, fatigue striation, dimple, cleavage et al) in fracture surfaces, failure events containing the crack origin, crack propagation, material deficiency could be understand.
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KEYWORD
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Fracture analysis, implant fixture, scanning electron microscope
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