원문정보
Effect of the speed sintering schedule on the marginal and internal gaps of multi-layered zirconia prothesis
초록
영어
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 ingredients 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 fabricated, 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.
목차
INTRODUCTION
MATERIALS AND METHODS
1. 주 모형 제작
2. 시편 제작
3. 소결 스케줄
4. 적합도 측정 지점
5. 실리콘 복제기술
6. 적합도 측정 방법
7. 통계분석
RESULTS
1. 변연 및 내면적합도 측정
DISCUSSION
CONCLUSIONS
ACKNOWLEDGEMENTS
REFERENCES