Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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Effect of cement space on marginal and internal fit of a zirconia core fabricated using by additive manufacturing

시멘트 공간이 적층 가공으로 제작한 지르코니아 하부구조물의 변연 및 내면 적합도에 미치는 영향

  • Ji-Won Min (Department of Dental Laboratory Science, College of Health Science, Catholic University of Pusan) ;
  • Se-Yeon Kim (Department of Dental Laboratory Science, College of Health Science, Catholic University of Pusan) ;
  • Jae-Hong Kim (Department of Dental Laboratory Science, College of Health Science, Catholic University of Pusan)
  • 민지원 (부산가톨릭대학교 보건과학대학 치기공학과) ;
  • 김세연 (부산가톨릭대학교 보건과학대학 치기공학과) ;
  • 김재홍 (부산가톨릭대학교 보건과학대학 치기공학과)
  • Received : 2024.02.06
  • Accepted : 2024.03.18
  • Published : 2024.03.30
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Abstract

Purpose: The goal of this study was to determine the clinical acceptability of various cement space settings for the marginal and internal fit of a zirconia core manufactured using additive manufacturing. Methods: The maxillary right incisor served as the master model. After scanning the maxillary right incisor with a dental 3D (three-dimensional) scanner, the stereo lithography file was created using different cement space settings of 40, 120, and 200 ㎛ using computer-aided design software (Dental System 2018; 3Shape). The marginal and internal fit of the 3 groups were determined using the silicon replica technique. Measurement points were divided into the following three categories: margin, axial wall, and incisal. To ensure more accurate measurements, these three measurement points were divided into 8 points. The Shapiro-Wilk, one-way ANOVA, and Tukey's honestly significant difference test (for all tests α=0.05) were the statistical analyses that were included in the study. Results: The CS (cement space)-200 group had better marginal and internal fit than the CS-40 and CS-120 groups, and there were statistically significant differences at the marginal and incisal points, except for the axial wall points. CS-200 group, both marginal and internal fit were within 120 ㎛, which is the clinically acceptable value. Conclusion: This study suggests that a 200 ㎛ cement space setting is ideal for optimal marginal and internal fit of 3D-printed ceramic crowns.

Keywords

Acknowledgement

This paper was supported by RESEARCH FUND offered from Catholic University of Pusan.

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