원문정보
Effect of cement space on the marginal and internal fit of zirconia restorations fabricated by CAD/CAM system
초록
영어
Purpose: The aim of this study was to evaluate the marginal and internal gap of zirconia copings fabricated by CAD/CAM system and to research the effect of cement space on the fit of zirconia prosthesis. Methods: Zirconia copings were designed using 3shape software and then milled from presintered zirconia blocks by Kavo dental milling machine. The cement space was set at 0 ㎛ around the margins for all groups, and additional cement space appling 1 mm above the finish lines of tooth. The samples were classified into 4 groups according to the cement space setting(Cs-0, Cs-40, Cs-80, Cs-120). Replica technique used to investigate marginal and internal gap. The silicone film thickness was recorded using a optical microscope with image software analysis system at 75×magnification. The assessment performed on the six points in bucco-lingual and mesio-distal sections(4 groups, 10 copings per group, 12 measuring points per coping). The data were statistically analyzed with one-way ANOVA followed by pair-wise Tukey’s post hoc tests(α<0.05). Results: Better marginal and internal fit values were exhibited by 80 ㎛ cement space. The results showed that different cement space values had statistically significant effect on the marginal and internal gap of zirconia copings(p<0.001). The gap of margin and axial wall area was smaller than that the gap of occlusal area in all groups(p<0.001). Conclusion : Effect of different cement spaces on the marginal and internal gap of zirconia copings.
목차
Ⅰ. 서론
Ⅱ. 연구 방법
1. 주모형의 설계 및 작업모형의 제작
2. 스캔 및 코어 디자인
3. 가공과 소결
4. 적합도 측정
5. 통계 분석
Ⅲ. 결과
1. 군별 각 측정영역에서의 적합도
2. 군별 적합도
3. 각 군별 측정영역의 적합도
4. 절단 방향에 따른 적합도
Ⅳ. 고찰
Ⅴ. 결론
REFERENCES