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Marginal fit of anterior 3-unit fixed partial zirconia restorations using different CAD/CAM systems
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  • Marginal fit of anterior 3-unit fixed partial zirconia restorations using different CAD/CAM systems
  • Marginal fit of anterior 3-unit fixed partial zirconia restorations using different CAD/CAM systems
저자명
Song. Tae-Jin,Kwon. Taek-Ka,Yang. Jae-Ho,Han. Jung-Suk,Lee. Jai-Bong,Kim. Sung-Hun,Yeo. In-Sung
간행물명
The journal of advanced prosthodontics
권/호정보
2013년|5권 3호|pp.219-225 (7 pages)
발행정보
대한치과보철학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

PURPOSE. Few studies have investigated the marginal accuracy of 3-unit zirconia fixed partial dentures (FPDs) fabricated by computer-aided design/computer-aided manufacturing (CAD/CAM) system. The purpose of this study was to compare the marginal fit of zirconia FPDs made using two CAD/CAM systems with that of metal-ceramic FPDs. MATERIALS AND METHODS. Artificial resin maxillary central and lateral incisors were prepared for 3-unit FPDs and fixed in yellow stone. This model was duplicated to epoxy resin die. On the resin die, 15 three-unit FPDs were fabricated per group (45 in total): Group A, zirconia 3-unit FPDs made with the Everest system; Group B, zirconia 3-unit FPDs made with the Lava system; and Group C, metal-ceramic 3-unit FPDs. They were cemented to resin dies with resin cement. After removal of pontic, each retainer was separated and observed under a microscope (Presize 440C). Marginal gaps of experimental groups were analyzed using one-way ANOVA and Duncan test. RESULTS. Mean marginal gaps of 3-unit FPDs were $60.46{mu}m$ for the Everest group, $78.71{mu}m$ for the Lava group, and $81.32{mu}m$ for the metal-ceramic group. The Everest group demonstrated significantly smaller marginal gap than the Lava and the metal-ceramic groups (P<.05). The marginal gap did not significantly differ between the Lava and the metal-ceramic groups (P>.05). CONCLUSION. The marginal gaps of anterior 3-unit zirconia FPD differed according to CAD/CAM systems, but still fell within clinically acceptable ranges compared with conventional metal-ceramic restoration.