급속소결이 다층 지르코니아 치과보철물의 변연 및 내면 적합도에 미치는 영향
Effect of the speed sintering schedule on the marginal and internal gaps of multi-layered zirconia prothesis
김세연, 김재홍,
소속 상세정보
김세연 ( Kim Se-Yeon ) - Catholic University of Pusan College of Health Sciences Department of Dental Laboratory Science
김재홍 ( Kim Jae-Hong ) - Catholic University of Pusan College of Health Sciences Department of Dental Laboratory Science
Abstract
Purpose: The purpose of this in vitro study is to evaluate the clinical acceptability of the marginal discrepancies and internal spacing of multi-layered zirconia prothesis by speed sintering.
Methods: The two specimen types come from the same manufacturer but differ in the in-gredients in layered zirconia and indication, that is anterior and posterior. The designs of both specimens were full contour crowns, and a total of 20 pieces were repeatedly fabricat-ed, 10 for each group. The specimens were divided into two subgroups (n=10) and sintered with various total times (4 hours, 8 hours) at the maximum temperature (1,530℃). The gap between the two groups of multi-layered zirconia prostheses was measured using a silicone replica technique of 2D analysis method. The independent sample t-test was then used to compare and analyze the data obtained from the two groups (α=0.05).
Results: The marginal and internal gap was superior in the 8-hour compared to the 4-hour group, and the results exhibited significant differences (p<0.05). All specimens showed that using the speed sintering schedule does not exceed the clinically permitted value of 120 μm, meaning zirconia prothesis using the speed sintering was adequate.
Conclusion: The sintering condition is shown to affect the marginal and internal gaps of multi-layered zirconia restoration.
키워드
Internal gap; Marginal gap; Multi-layered zirconia; Silicone replica technique; Speed sintering
원문 및 링크아웃 정보
등재저널 정보