밀링 방법으로 제작한 레진과 지르코니아 3본브릿지 모델의 3차원 분석을 이용한 재현성 비교
Comparison of Reproducibility of Milled Acrylic Resin and Zirconia Models for 3-unit bridge Using Three-dimensional Analysis
박강석, 김성균, 허성주, 곽재영, 박지만, 안진수, 서덕규,
소속 상세정보
박강석 ( Park Gang-Seok ) - 서울대학교 치의학대학원 치과보철학교실
김성균 ( Kim Seong-Kyun ) - 서울대학교 치의학대학원 치과보철학교실
허성주 ( Heo Seong-Joo ) - 서울대학교 치의학대학원 치과보철학교실
곽재영 ( Koak Jai-Young ) - 서울대학교 치의학대학원 치과보철학교실
박지만 ( Park Ji-Man ) - 연세대학교 치과대학 보철과학교실
안진수 ( Ahn Jin-Soo ) - 서울대학교 치의학전문대학원 치과생체재료과학교실
서덕규 ( Seo Deog-Gyu ) - 서울대학교 치의학대학원 치과보존학교실
Abstract
Purpose: The objective of this study was to investigate the reproducibility of milled acrylic resin and zirconia models using three-dimensional analysis.
Material and Methods: Zirconia discs and acrylic resin blocks were milled to make models. Each model was scanned with a model scanner. The zirconia models were superimposed with other zirconia model, and the acrylic resin models were superimposed with other acrylic resin model threedimensionally. Root-mean-square (RMS) values were obtained. Distances between two superimposed models were measured. Statistical significances were tested using the Mann-Whitney U test and t-test.
Results: The RMS values of the zirconia model and the acrylic resin model were not significantly different (p ≥0.05). At the premolar site, distances between the zirconia models at the upper axial and at the lower axial wall were significantly smaller than for the acrylic resin models (p <0.05). At the molar site, distance between the zirconia models at the lower axial wall was significantly smaller than for the acrylic resin models (p <0.05).
Conclusion: Although there is a difference in reproducibility between the milled acrylic resin model and the zirconia model in the localized region, no significant difference was found in the whole model.
키워드
Zirconia ; Milled acrylic resin ; Three-dimensional analysis; Reproducibility
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