반복하중이 다양한 임플란트-지대주의 풀림 토크에 주는 영향
The Effect of Cyclic Loading on the Removal Torque between Various Implant-Abutment System
김대성, 허수복, 이상혁, 이상훈, 양형철, 임범순,
소속 상세정보
김대성 ( Kim Dae-Sung ) - 서울대학교 치과대학 치과생체재료과학교실
허수복 ( Her Soo-Bok ) - 서울대학교 치의학대학원 치과생체재료과학교실
이상혁 ( Lee Sang-Hyeok ) - 서울대학교 치의학대학원 치과생체재료과학교실
이상훈 ( Lee Sang-Hoon ) - 서울대학교 치의학대학원 치과생체재료과학교실
양형철 ( Yang Hyeong-Cheol ) - 서울대학교 치의학대학원 치과생체재료과학교실
임범순 ( Lim Bum-Soon ) - 서울대학교 치의학대학원 치과생체재료과학교실
KMID : 0362220110380030197
Abstract
The object of this study was to evaluate the effect of the number of cyclic loading and materials for abutment on the screw loosening. Three different abutments were tested such as titanium, zirconia and zirconia-alumina composite. Titanium fixtures and screws were used for implant systems for all experimental groups. Four different cyclic loads (105, 5×105, 10×105 a nd 20×1 05), between 0 and 60 N, were applied 30° angled to the axial direction of the underlying abutment. Removal torque of screw was measured after and before cyclic loading using digital torque gauge. Five measurements were performed at each experimental group. The data were analyzed using t-test and Tukey multiple comparisons test
(p=0.05). Although there was a significant decrease in the removal torque values in the all of experimental groups, screw loosening could not be detected tactilely. This may indicate that the remaining tightening torque would serve clinically for a longer period of time regardless of abutment materials as well as application of cyclic loading.
키워드
Abutment;Cyclic loading;Removal torque;Screw loosening;Zirconia
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