| Texto completo | |
| Autor(es): |
Assuncao, Wirley Goncalves
[1]
;
Adelino, Valentim
[1]
;
Barao, Ricardo
[1]
;
Pita, Murillo Sucena
[1]
;
Goiato, Marcelo Coelho
[1]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Sao Paulo State Univ, Aracatuba Dent Sch, Dept Dent Mat & Prosthodont, BR-16015050 Sao Paulo - Brazil
Número total de Afiliações: 1
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF PROSTHETIC DENTISTRY; v. 102, n. 6, p. 385-392, DEC 2009. |
| Citações Web of Science: | 20 |
| 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 (MID), 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 degrees C for 9 hours). After polymerization, all of the specimens were thermal cycled between 5 degrees C and 55 degrees C with 30-second dwell times for 5000 cycles. The specimen colors were measured with a spectro photometer, using the CIE L{*}a{*}b{*} system, at baseline (13), after polymerization (P), and after thermal cycling (T). Color differences (Delta E) were calculated for periods between P and B (PB), T and B (TB), and T and P (TP). A Delta E of <= 3.3 was considered clinically acceptable. The data were evaluated by 3-way repeated-measures ANOVA and the Tukey HSD test (alpha=.05). Results. The highest Delta E 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 Delta E values are within acceptable clinical limits for all brands, for both polymerization methods and different measurement periods. (J Prosthet Dent 2009;102:385-392) (AU) | |
| Processo FAPESP: | 06/60850-4 - Efeito do ciclo de polimerizacao e de termociclagem sobre a estabilidade de cor de dentes artificiais de resina acrilica. |
| Beneficiário: | Murillo Sucena Pita |
| Modalidade de apoio: | Bolsas no Brasil - Iniciação Científica |