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논문 기본 정보

자료유형
학술저널
저자정보
최정훈 (서울대학교) 허성주 (서울대학교) 곽재영 (서울대학교) 김성균 (서울대학교) 박지만 (서울대학교) 안진수 (서울대학교)
저널정보
대한치과보철학회 The Journal of Advanced of Prosthodontics The Journal of Advanced of Prosthodontics 제15권 제2호
발행연도
2023.4
수록면
63 - 71 (9page)
DOI
https://doi.org/10.4047/jap.2023.15.2.63

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Purpose. The aim of this study was to assess the effect of hemispherical dimple structures on the retention of cobalt–chromium (Co–Cr) crowns cemented to titanium abutments, with different heights and numbers of dimples on the axial walls. Materials and methods. 3.0-mm and 6.0-mm abutments (N = 180) and Co-Cr crowns were prepared. The experimental groups were divided into two and four dimple groups. The crowns were cemented by TempBond and PANAVIA F 2.0 cements. The retention forces were measured after thermal treatments. A two-way Analysis of Variance (ANOVA) and post-hoc Tukey HSD test were conducted to analyze change in retention forces by use of dimples between groups, as well as t test for the effect of abutment height change (α = .05). Results. Results of the two-way ANOVA showed a statistically significant difference in retention force due to the use of dimples, regardless of the types of cements used (P < .001). A significantly higher mean retention forces were observed in the groups with dimples than in the control group, using the post hoc Tukey HSD test (P < .001). Results of t test displayed a statistically significant increase in the retention force with 6.0-mm abutments compared with 3.0-mm abutments (P < .001). The groups without dimples revealed adhesive failure of cements, while the groups with dimples showed mixed failure of cements. Conclusion. Use of hemispherical dimples was effective for increasing retention forces of cemented crowns. [J Adv Prosthodont 2023;15:63-71]

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