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KMID : 1023820110030030140
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The Journal of Advanced Prosthodontics
2011 Volume.3 No. 3 p.140 ~ p.144
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Finite element study on the effect of abutment length and material on implant bone interface against dynamic loading
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Manish Mishra
Shogo Ozawa
Tatsuhiko Masuda
Fumi Yoshioka
Yoshinobu Tanaka
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Abstract
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PURPOSE : Finite element study on the effect of abutment length and material on implant bone interface against dynamic loading.
MATERIALS AND METHODS : Two dimensional finite element models of cylinderical implant, abutments and bone made by titanium or polyoxymethylene were simulated with the aid of Marc/Mentat software. Each model represented bone, implant and titanium or polyoxymethylene abutment. Model 1: Implant with 3 mm titanium abutment, Model 2: Implant with 2 mm polyoxymethylene resilient material abutment, Model 3: Implant with 3 mm polyoxymethylene resilient material abutment and Model 4: Implant with 4 mm polyoxymethylene resilient material abutment. A vertical load of 11 N was applied with a frequency of 2 cycles/sec. The stress distribution pattern and displacement at the junction of cortical bone and implant was recorded.
RESULTS : When Model 2, 3 and 4 are compared with Model 1, they showed narrowing of stress distribution pattern in the cortical bone as the height of the polyoxymethylene resilient material abutment increases. Model 2, 3 and 4 showed slightly less but similar displacement when compared to Model 1.
CONCLUSION : Within the limitation of this study, we conclude that introduction of different height resilient material abutment with different heights i.e. 2 mm, 3 mm and 4 mm polyoxymethylene, does not bring about significant change in stress distribution pattern and displacement as compared to 3 mm Ti abutment. Clinically, with the application of resilient material abutment there is no significant change in stress distribution around implant-bone interface.
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KEYWORD
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Dental implant, Dynamic, Finite element analysis, Resilient material abutment, Polyoxymethylene, Bone-implant interface
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