Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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Observation of surface roughness and grinding angle by automatic barrel finishing process of dental 3D printed resin

3D 프린터로 출력된 치과용 레진의 자동바렐연마공정에 따른 표면 거칠기 및 연마도 관찰

  • Yu-Jin Park (Department of Dental Laboratory Science, Catholic University of Pusan) ;
  • An-Na Jung (Department of Dental Laboratory Science, Catholic University of Pusan)
  • 박유진 (부산가톨릭대학교 치기공학과) ;
  • 정안나 (부산가톨릭대학교 치기공학과)
  • Received : 2023.05.15
  • Accepted : 2023.06.13
  • Published : 2023.06.30
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Abstract

Purpose: This study aimed to confirm the applicability of gloss polishing using automatic barrel finishing with respect to three-dimensional (3D)-printed resin specimens. The surface roughness and grinding angle of the 3D-printed resin specimens were observed with respect to gloss polishing time using automatic dental barrel finishing. Methods: Herein, experiments were conducted on four types of 3D-printed resin specimens. The specimens, with a thickness of 100 ㎛ each, were printed using a 3D printer. Subsequently, light polymerization was performed on these specimens for 15 min. Post this surface treatment, the specimens underwent grinding for 25 min. This process was followed by gloss polishing at 5-min intervals for up to 25 min using automatic dental barrel finishing. The specimens were photographed using a 3D optical microscope, and their surface roughness and grinding angle were measured. Results: The Ra (centerline average roughness) values of all the specimens, except for crown & bridge 10 group and those in the control group that were not polished using automatic barrel finishing, were <0.2 ㎛. However, polishing time needs to be controlled to realize the desired surface roughness and grinding amount considering the hardness of the resin used. Conclusion: Gloss polishing of 3D-printed resin can be realized using automatic dental barrel finishing. However, polishing time needs to be controlled to realize the desired surface roughness and grinding amount considering the hardness of the resin used.

Keywords

Acknowledgement

This paper was supported by RESEARCH FUND offered from Catholic University of Pusan in 2022.

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