Color stability of silorane-based composites submitted to accelerated artificial ageing-An in situ study

被引:29
作者
Panzeri Pires-de-Souza, Fernanda de Carvalho [1 ]
Roberti Garcia, Lucas da Fonseca
Rego Roselino, Lourenco de Moraes
Naves, Lucas Zago [2 ]
机构
[1] Univ Sao Paulo, Ribeirao Preto Sch Dent, Dept Dent Mat & Prosthodont, Fac Odontol Ribeirao Preto, BR-14040904 Ribeirao Preto, SP, Brazil
[2] Univ Estadual Campinas, Piracicaba Sch Dent, Dept Restorat Dent, Dent Mat Area, Piracicaba, SP, Brazil
关键词
Color stability; Low-shrinking composite; Silorane; Surface degradation; 4-YEAR WATER DEGRADATION; DENTAL RESIN COMPOSITES; TOTAL-ETCH; FILLER; RESTORATION; SHRINKAGE; SORPTION; ELUTION; STRESS; SYSTEM;
D O I
10.1016/j.jdent.2011.03.003
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
Objectives: To assess the in situ color stability, surface and the tooth/restoration interface degradation of a silorane-based composite (P90, 3M ESPE) after accelerated artificial ageing (AAA), in comparison with other dimethacrylate monomer-based composites (Z250/Z350, 3M ESPE and Esthet-X, Dentsply). Methods: Class V cavities (25 mm(2) x 2 mmdeep) were prepared in 48 bovine incisors, which were randomly allocated into 4 groups of 12 specimens each, according to the type of restorative material used. After polishing, 10 specimens were submitted to initial color readings (Easyshade, Vita) and 2 to analysis by scanning electronic microscopy (SEM). Afterwards, the teeth were submitted to AAA for 384 h, which corresponds to 1 year of clinical use, after which new color readings and microscopic images were obtained. The values obtained for the color analysis were submitted to statistical analysis (1-way ANOVA, Tukey, p < 0.05). Results: With regard to color stability, it was verified that all the composites showed color alteration above the clinically acceptable levels (Delta E >= 3.3), and that the silorane-based composite showed higher Delta E (18.6), with a statistically significant difference in comparison with the other composites (p < 0.05). The SEM images showed small alterations for the dimethacrylate-based composites after AAA and extensive degradation for the silorane-based composite with a rupture at the interface between the matrix/particle. Conclusion: It may be concluded that the silorane-based composite underwent greater alteration with regard to color stability and greater surface and tooth/restoration interface degradation after AAA. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码:E18 / E24
页数:7
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