Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Correlation between UV-dose and Shrinkage amounts of Post-curing Process for Precise Fabrication of Dental Model using DLP 3D Printer

DLP 공정을 이용한 정밀 치아모델 제작에서 UV 조사량과 후경화 수축률의 상관관계 분석

  • Shin, Dong-Hun (Graduate School of Mechanical Engineering, Pusan National University) ;
  • Park, Young-Min (Research and Development Center, DIO Corporation) ;
  • Park, Sang-Hu (School of Mechanical Engineering, ERC/NSDM, Pusan National University)
  • 신동훈 (부산대학교 기계공학부 대학원) ;
  • 박영민 (디오임플란트 기술센터) ;
  • 박상후 (부산대학교 기계공학부/정밀정형 및 금형가공연구소)
  • Received : 2018.02.12
  • Accepted : 2018.02.22
  • Published : 2018.04.30
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Abstract

Nowadays, additive manufacturing (AM) technology is a promising process to fabricate complex shaped devices applied in medical and dental services. Among the AM processes, a DLP (digital light processing) type 3D printing process has some advantages, such as high precision, relatively low cost, etc. In this work, we propose a simple method to fabricate precise dental models using a DLP 3D printer. After 3D printing, a part is commonly post-cured using secondary UV-curing equipment for complete polymerization. However, some shrinkage occurs during the post-curing process, so we adaptively control the UV-exposure time on each layer for over- or under-curing to change the local shape-size of a part in the DLP process. From the results, the shrinkage amounts in the post-curing process vary due to the UV-dose in 3D printing. We believe that the proposed method can be utilized to fabricate dental models precisely, even with a change of the 3D CAD model.

Keywords

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