치근형 임프란트의 설계 형상이 골내응력 분포에 미치는 영향에 대한 유한요소해석적 연구
A Finite Element Stress Analysis of the Bone aroung Implant following the Shape of Root Form Implant
안형준, 김귀애, 최재갑,
소속 상세정보
안형준 ( ) - 경북대학교 치과대학 보철학교실
김귀애 ( ) - 경북대학교 치과대학 보철학교실
최재갑 ( ) - 경북대학교 치과대학 보철학교실
KMID : 0362820030220010025
Abstract
Root analog type dental implants installed in alveolar bones were axisymmetrically modelled for finite element stress analysis. Distributions of stresses in the bone around the implants subject to a vertical occlusal load of 50N were calculated for 3 different root analog Frialit-2 models, i. e. the stepped cylinder, the stepped screw, and the Synchro types. Main consideration was given to the stresses near the cervical area of the implant where the highest stress concentration are likely to occur, eliciting the higher risk of bone resorption. Further stress analyses were carried out to investigate the effect of the load transferring design of the abutment screw between the abu tment and the fixture on the bone stress level. Results of the present study indicated that the screws on the Frialit-2 implant fixtures play significant roles for the reduced bone stress level. Screws of the higher step were turned out to be more effective. Location of the load transfer between the abutment and fixture were found to be potentially important too for the lowered bone stresses around the cervix of implants. The shorter the abutment screws, thus the nearer the load transferring area were from the cervix of the implant, the higher the stress was attained there. On the other hand, not as much reduction in the stress could be attained by a longer abutment screw indicating a good design compromise would be possible between the stresses and the length of the abutment screws.
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