Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지)

Korean Academy of Stomatognathic Function and Occlusion (대한턱관절교합학회)
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Comparative evaluation of the subtractive and additive manufacturing on the color stability of fixed provisional prosthesis materials

고정성 임시 보철물 재료의 색 안정성에 대한 절삭 및 적층가공법의 비교평가

  • Lee, Young-Ji (Department of Prosthodontics, College of Dentistry, Wonkwang University) ;
  • Oh, Sang-Chun (Department of Prosthodontics, College of Dentistry, Wonkwang University)
  • 이영지 (원광대학교 치과대학 치과보철학교실) ;
  • 오상천 (원광대학교 치과대학 치과보철학교실)
  • Received : 2021.01.20
  • Accepted : 2021.03.12
  • Published : 2021.06.30
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Abstract

Purpose: The purpose of this study is to compare the color stability of provisional restorative materials fabricated by subtractive and additive manufacturing. Materials and Methods: PMMA specimens by subtractive manufacturing and conventional method and bis-acryl specimens by additive manufacturing were fabricated each 20. After immersing specimens in the coffee solution and the wine solution, the color was measured as CIE Lab with a colorimeter weekly for 4 weeks. Color change was calculated and data were analyzed with one-way ANOVA and the Tukey multiple comparisons test (α = 0.05). Results: PMMA provisional prosthetic materials by subtractive manufacturing showed superior color stability compared to bis-acryl provisional prosthetic materials by additive manufacturing (P < 0.05), and showed similar color stability to the PMMA provisional prosthetic materials by conventional method (P > 0.05). Conclusion: It is recommended to fabricate provisional restorations by subtractive manufacturing in areas where esthetics is important, such as anterior teeth, and consideration of the color stability will be required when making provisional prosthetic using additive manufacturing.

목적: 본 연구의 목적은 CAD-CAM 방식 중 절삭가공과 적층가공으로 제작한 임시 보철 재료의 색 안정성을 비교 연구하는 것이다. 연구 재료 및 방법: 절삭가공을 통해 제작한 PMMA계열, DLP타입 프린터와 광경화성 수지를 이용해 적층가공으로 제작한 bis-acryl계열 그리고 전통적인 방법으로 제작한 PMMA계열의 시편을 각 20개씩 제작하였다. 시편을 커피용액과 와인용액에 침전시킨 후, 비색계를 이용하여 4주간 매주 색 측정을 시행하였다. 색 변화(ΔE*)값의 비교분석을 위해 One-way ANOVA와 사후 검정으로 Tukey test를 실시하였다(α = 0.05). 결과: 절삭가공을 통해 제작된 PMMA계열의 시편은 적층가공을 통해 제작된 bis-acryl계열의 시편에 비해 뛰어난 색 안정성을 보였고(P < 0.05), 전통적인 방법을 통해 제작된 PMMA계열의 시편과 유사한 색 안정성을 보였다(P > 0.05). 결론: 전치부와 같이 심미가 중요한 부위에서는 절삭가공을 통한 임시 보철물의 제작을 추천하며, 적층가공을 이용한 임시 보철물 제작 시에는 색 안정성에 대한 고려가 필요하다.

Keywords

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