Earticle

초록

영어

Purpose: This study aimed to quantitatively evaluate the effect of ultraviolet (UV) exposure time on the dimensional accuracy of dental models fabricated using a masked stereolithography apparatus (MSLA) printer. Methods: Hollow square specimens (10 mm outer width, 1 mm wall thickness) were designed and printed using an MSLA 3D printer. The UV-light intensity was fixed at 80%, and the exposure times were set to 2, 3, 4, and 5 seconds (n=12 per group). Following standard post-processing, the width and length of each specimen were measured using a digital Vernier caliper (n=24). One-way ANOVA and Tukey’s honestly significant difference post-hoc test were conducted to analyze intergroup differences (α=0.05). Results: Significant dimensional increases were observed with longer UV exposure times (p<0.001). The 2-second exposure group (10.122±0.037 mm) demonstrated the closest dimensions to the designed 10 mm, whereas the 5-second group exhibited the largest expansion (10.379±0.036 mm). The width and length were not significantly different in all groups (p>0.05). Conclusion: The UV exposure time is a critical parameter that affects the dimensional accuracy of MSLA 3D-printed dental models. Excessive exposure leads to over-polymerization and volumetric expansion. Therefore, regulated exposure-time is crucial for a precise clinical fit in dental prosthesis fabrication.

목차

Abstract
INTRODUCTION
MATERIALS AND METHODS
1. 3D 프린터의 UV 광원 출력 강도 측정
2. 시편 디자인
3. 시편 제작
4. 시편 측정
5. 통계 분석
RESULTS
DISCUSSION
CONCLUSIONS
FUNDING
ACKNOWLEDGEMENTS
CONFLICT OF INTEREST
ORCID
REFERENCES

키워드

저자

• 김종우 [ Jong-Woo Kim | 동남보건대학교 치기공학과 ] Corresponding Author
• 신관하 [ Kwan-Ha Shin | 동남보건대학교 치기공학과 ]

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