Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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Effect of zirconia ceramic sintering condition on the precision of fit in dental restorations

지르코니아 세라믹 소결조건이 치과보철물의 적합도에 미치는 영향

  • Kim, Jae-Hong (Department of Dental Laboratory Science, College of Health Science, Catholic University of Pusan) ;
  • Kim, Ki-Baek (Department of Dental Lab Technology, Daejeon Health Institute of Technology)
  • 김재홍 (부산가톨릭대학교 보건과학대학 치기공학과) ;
  • 김기백 (대전보건대학교 치기공(학)과)
  • Received : 2020.04.29
  • Accepted : 2020.06.02
  • Published : 2020.06.30
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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.

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References

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