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지르코니아 세라믹 소결조건이 치과보철물의 적합도에 미치는 영향

Effect of zirconia ceramic sintering condition on the precision of fit in dental restorations

대한치과기공학회지 2020년 42권 2호 p.121 ~ 128
김재홍, 김기백,
소속 상세정보
김재홍 ( Kim Jae-Hong ) - Catholic University of Pusan College of Health Sciences Department of Dental Laboratory Science
김기백 ( Kim Ki-Baek ) - Daejeon Health Institute of Technology Department of Dental Laboratory Technology

Abstract


Purpose: This study aimed to investigate the effects of the sintering conditions of zirconia core on the adaptability.

Methods: Ten specimens of each of commercial brand of zirconia(Razor 1100, U&C international, Seoul, Korea) were made and sintered under three different conditions. Specimens were divided into three subgroup(n=10) and sintered with various total time(1hr, 3hr, 9hr) at the maximum temperature(1500℃). The digitized data was superimposed with 3D inspection software to quantitatively obtain the adaptation of a zirconia core, and visual differences were confirmed with a color map. The root mean square(RMS) values of group were statistically analyzed with one-way ANOVA(α=0.05).

Results: The overall adaptation of the zirconia cores were as follows; ss-1hr: 36.18±5.2㎛, ss-3hr: 39.55±3.9㎛, cs-9hr: 46.62±4.3㎛. They were statistically significant differences between groups for adaptation(p<0.05).

Conclusion: Based on the results of this study, it could be considered that sintering condition of 1500℃ and 1~3 hour is recommended for the better marginal and internal fit. Speed sintering can be widely utilized to fabricate zirconia prothesis as the properties of those almost are to dentistry uses.

키워드

Adaptation; CAD/CAM; Dental zirconia; Sintering condition

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