Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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Comparative analysis of the flexural strength of provisional restorative resins using a digital light processing printer according to the post-curing method

디지털 광원 처리 프린터로 제작된 임시수복용 레진의 후경화 기계에 따른 굴곡강도 연구

  • Park, Young-Dae (Department of Dental Laboratory, Daegu Health College) ;
  • Kang, Wol (Department of Dental Laboratory, Daegu Health College)
  • 박영대 (대구보건대학교 치기공과) ;
  • 강월 (대구보건대학교 치기공과)
  • Received : 2020.10.30
  • Accepted : 2020.12.16
  • Published : 2020.12.30
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Abstract

Purpose: This study aimed to evaluate the effect of post-curing method on the flexural strength of provisional restorative resins produced by a digital light processing printer. Methods: A total of 20 specimens were produced, with a length of 64 mm, width of 10 mm, and thickness of 3.3 mm using a digital light processing printer. Two types of provisional restorative resins made with different post-curing methods were investigated and divided into conventional and vacuum groups. For the flexural strength test, each group was prepared by each method according to ISO 10477, and the flexural strength was measured with a universal testing machine. For statistical analysis, data were analyzed by independent t-test and Mann-Whitney U test. Results: The flexural strengths of the conventional and vacuum groups were 151.89 MPa and 131.94 MPa, respectively, showing a statistically significant difference (p<0.05). Conclusion: Within the limitation of this study, provisional restorative resins produced with vacuum demonstrated lower flexural strength than those produced with conventional postcuring method.

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