원문정보
Assessment of inlay ceramic restorations manufactured using the hot-pressing method
초록
영어
Purpose: The purpose of this study was to compare the marginal and internal fit of lithium disilicate ceramic inlay produced by heat pressing that inlay pattern made by subtractive manufacturing and additive manufacturing method. Methods: A mandibular lower first molar that mesial occlusal cavity (MO cavity) die was prepared. After fabricating an epoxy resin model using a silicone impression material, epoxy resin die was scanned with a dental model scanner to design an MO cavity inlay. The designed STL pile was used to fabricate wax patterns and resin patterns, and then lithium disilicate ceramic inlays were fabricated using hot-press method. For the measurement of the marginal and internal gap of the lithium disilicate, silicone replica method was applied, and gap was measured through an optical microscope (x 80). Data were tested for significant differences using the Mann-Whitney Utest. Results: The marginal fit was 103.56±9.92μm in the MIL-IN group and 81.57±9.33μm in the SLA-IN group, with a significant difference found between the two groups (p<0.05). The internal fit was 120.99±17.52μm in the MIL-IN group and 99.18±6.65μm in the SLA-IN group, with a significant difference found between the two groups (p<0.05). Conclusion: It is clinically more appropriate to apply the additive manufacturing than subtractive manufacturing method in producing lithium disilicate inlay using CAD/CAM system.
목차
Ⅰ. 서론
Ⅱ. 연구 방법
1. 작업모형 제작
2. 근심면 교합면 와동 인레이 제작
3. 실리콘 복제방법을 이용한 적합도 측정
4. 통계 분석
Ⅲ. 결과
1. 변연적합도
2. 내면적합도
Ⅳ. 고찰
Ⅴ. 결론
REFERENCES