Effect of polymerization methods and thermal cycling on color stability of acrylic resin denture teeth
Carregando...
Data
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Mosby-elsevier
Tipo
Artigo
Direito de acesso
Acesso restrito
Resumo
Statement of problem: Acrylic resin denture teeth are widely used due to the chemical bond to the acrylic resin of the denture base. However, discoloration of acrylic resin denture teeth can be a problem. Purpose: The purpose of this study was to investigate the effect of polymerization methods and thermal cycling on the color change of acrylic resin denture teeth. Material and methods: Ten different brands of acrylic resin denture teeth were evaluated: Art Plus (AP), Biolux (BX), Biotone IPN (BI), Magister (MG), Mondial 6 (MD), Premium 6 (PR), SR Vivodent PE (SR), Trilux (TR), Trubyte Biotone (TB), and Vipi Dent Plus (VP). Each brand was divided into 2 groups (n=12); each group was subjected to 1 of 2 polymerization methods (microwave, 500 W for 3 minutes, or water bath, 74°C for 9 hours). After polymerization, all of the specimens were thermal cycled between 5°C and 55°C with 30-second dwell times for 5000 cycles. The specimen colors were measured with a spectrophotometer, using the CIE L*a*b* system, at baseline (B), after polymerization (P), and after thermal cycling (T). Color differences (ΔE) were calculated for periods between P and B (PB), T and B (TB), and T and P (TP). A ΔE of ≤3.3 was considered clinically acceptable. The data were evaluated by 3-way repeated-measures ANOVA and the Tukey HSD test (α=.05). Results: The highest ΔE values were obtained for BI and SR teeth; these were significantly higher than the values obtained for the other brands (P<.05). There was no significant difference between the 2 polymerization methods. There was no significant difference between TB and PB for either polymerization method. Conclusions: The ΔE values are within acceptable clinical limits for all brands, for both polymerization methods and different measurement periods. © 2009 The Editorial Council of the Journal of Prosthetic Dentistry.
Descrição
Palavras-chave
Acrylic acid resin, Water, Color, Colorimetry, Dental care, Hardness, Heat, Materials testing, Microwave radiation, Phase transition, Prosthesis, Tooth prosthesis, Acrylic Resins, Color, Colorimetry, Dental Stress Analysis, Hardness, Hot Temperature, Materials Testing, Microwaves, Phase Transition, Prosthesis Coloring, Tooth, Artificial, Water
Idioma
Inglês
Citação
Journal of Prosthetic Dentistry, v. 102, n. 6, p. 385-392, 2009.
