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http://dx.doi.org/10.14368/jdras.2021.37.2.73

Comparative evaluation of the subtractive and additive manufacturing on the color stability of fixed provisional prosthesis materials  

Lee, Young-Ji (Department of Prosthodontics, College of Dentistry, Wonkwang University)
Oh, Sang-Chun (Department of Prosthodontics, College of Dentistry, Wonkwang University)
Publication Information
Journal of Dental Rehabilitation and Applied Science / v.37, no.2, 2021 , pp. 73-80 More about this Journal
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.
Keywords
color stability; computer-aided design/computer-aided manufacturing (CAD-CAM); additive manufacturing; subtractive manufacturing;
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