Earticle

초록

영어

Purpose: This in vitro study was conducted to compare dimensional accuracy and buildplatform uniformity among three vat photopolymerization dental 3D printing systems using a 20-mm cross-shaped specimen. Methods: Three printer–material–post processing systems were evaluated: Form 4B with Precision Model Resin (Formlabs), NBEE (UNIZ) with TC-80DP (Graphy), and MAZIC L-200 with Model 2.0 (VERICOM). Eleven cross-shaped specimens were distributed across the build platform, and X- and Y-dimensions were measured using a digital caliper. Five replicate print sets per system were analyzed. Absolute deviation from the target of 20.00 mm was the primary accuracy measure, and positions were classified as center, edge, or corner. Kruskal–Wallis and post hoc Mann–Whitney U tests were used for comparisons among systems, and Friedman tests were used for regional comparisons. Results: The mean absolute deviations were 173±4, 22±9, and 22±3 µm for Form 4B, NBEE, and L-200, respectively (p=0.009). Form 4B differed significantly from NBEE and L-200 (adjusted p=0.024), whereas NBEE and L-200 did not show significant difference (p=0.841). Form 4B showed systematic undersizing (signed deviation, −173±4 µm). Regional differences were significant for Form 4B (p=0.007) and L-200 (p=0.008), but not for NBEE (p=0.165). Conclusion: The three printer–material–post processing systems exhibited different patterns of dimensional error and spatial variation. Multi-position evaluation captured patterns that could be missed by center-only measurements, supporting the assessment of the printing system as an integrated workflow rather than based on printer hardware alone.

목차

Abstract
INTRODUCTION
MATERIALS AND METHODS
1. 연구 설계 및 3D 프린팅 시스템
2. 십자형 시편과 빌드 플랫폼 배치
3. 출력 및 후경화
4. 치수 측정과 평가 지표
5. 통계 분석
RESULTS
1. 프린터 시스템별 전체 치수 정확도
2. 빌드 플랫폼 위치별 균일성
DISCUSSION
CONCLUSIONS
FUNDING
ACKNOWLEDGEMENTS
CONFLICT OF INTEREST
ORCID
REFERENCES

키워드

저자

• 김장현 [ Jang-hyun Kim | 서울대학교 치의학대학원 치학연구소 ]
• 박지만 [ Ji-Man Park | 서울대학교 치의학대학원 보철학교실 ] 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