Earticle

초록

영어

Purpose: This study aimed to evaluate the clinical acceptability of various cement space settings on the marginal and internal fit of cobalt–chromium (Co-Cr) copings fabricated by additive manufacturing. Methods: The maxillary right first molar was used as the master model (AG-3, Frasaco). After scanning the master model using a dental three-dimensional scanner (E3, 3Shape), the stereolithography file was created with different cement space settings of 0, 30, 50, and 100 μm using computer-aided design software (Dental System 2018-1 ×64, 3Shape). A total of 40 single copings were made with the selective laser melting (SLM) method using Co- Cr alloy and were divided into four cement space groups with 10 specimens each. The marginal and internal fit of the four groups were measured using the silicone replica technique. The measurement points were categorized into margin, axial wall, and occlusal. Statistical analyses were performed by the Shapiro–Wilk test, one-way analysis of variance, and Tukey’s honestly significant difference test (α=0.05). Results: In the cement space 50 μm group, the marginal and internal fit was found to be overall superior to that of the cement space 0, 30, and 100 μm groups, and the margin and occlusal points demonstrated significant differences, except the axial wall points. Conclusion: In this study, a cement space setting of 50 μm is recommended to achieve optimal marginal and internal fit for Co-Cr copings fabricated using the SLM technique.

목차

Abstract
INTRODUCTION
MATERIALS AND METHODS
1. 모형 제작
2. 시편 제작
3. 적합도 측정
4. 통계분석
RESULTS
DISCUSSION
CONCLUSIONS
FUNDING
ACKNOWLEDGEMENTS
CONFLICT OF INTEREST
ORCID
REFERENCES

키워드

저자

• 김윤정 [ Yoon-Jung Kim | 부산가톨릭대학교 보건과학대학 치기공학과 ]
• 김재홍 [ Jae-Hong Kim | 부산가톨릭대학교 보건과학대학 치기공학과 ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  대한치과기공학회지 [THE JOURNAL OF KOREAN ACADEMY OF DENTAL TECHNOLOGY]

• 간기

  계간

• pISSN

  1229-3954

• eISSN

  2288-5218

• 수록기간

  1979~2026

• 등재여부

  KCI 등재

• 십진분류

  KDC 515 DDC 617