Earticle

초록

영어

Purpose: This study aimed to assess the effect of slicer-based tolerance compensation on the dimensional accuracy (trueness and precision) of dental models fabricated via masked stereolithography (MSLA) 3D printing. It focused on how different offset values affected the internal and external surfaces. Methods: Simplified, hollow, crown-shaped specimens were designed and categorized into four groups (A~D) based on the internal and external tolerance compensation values (−50 μm or 0 μm). Sixteen specimens per group were printed under identical conditions. After post-processing, the models were digitized with a dental scanner. The 3D deviations between the designed data (STEP) and scanned data (STL) were analyzed using Geomagic Control X. Conformity was quantified by root mean square (RMS) values. Results: Trueness analysis showed significant differences (p<0.001). For the internal surface, Group C (–50 μm internal, 0 μm external) showed the highest trueness (lowest RMS). Conversely, Group D (0 μm internal, 0 μm external) showed the highest trueness for the external surface. Precision analysis showed no significant differences among the groups (p>0.05). Color deviation maps confirmed that applying a –50-μm internal tolerance increased the surface area within the acceptable deviation range (±10 μm). Conclusion: Adjusting tolerance compensation in the slicer stage markedly influences the volumetric accuracy of the MSLA-printed dental models. These findings suggest that optimizing distinct tolerance parameters for internal and external surfaces is crucial for improving the dimensional accuracy and clinical fit of dental prostheses in the digital workflow.

목차

Abstract
INTRODUCTION
MATERIALS AND METHODS
1. 지대치 시편 디자인
2. 시편 제작 및 선정
3. 시편 세척 및 후처리
4. 시편 스캔 및 데이터 분석
5. 통계분석
RESULTS
DISCUSSION
CONCLUSIONS
FUNDING
ACKNOWLEDGEMENTS
CONFLICT OF INTEREST
ORCID
REFERENCES

키워드

저자

• 신관하 [ Kwan-Ha Shin | 동남보건대학교 치기공학과 ]
• 김종우 [ Jong-Woo Kim | 동남보건대학교 치기공학과 ]
• 박종경 [ Jong-Kyoung Park | 김천대학교 헬스케어대학 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