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https://hdl.handle.net/10923/828
Tipo: | article |
Título: | Surface changes in denture soft liners with and without sealer coating after mechanical brushing abrasion |
Autor(es): | Mainieri, Vivian Chiada Beck, Joaquim Oshima, Hugo Mitsuo Silva Hirakata, Luciana Mayumi Shinkai, Rosemary Sadami Arai |
Editora: | Blackwell Publishing |
Data de Publicação: | 2011 |
Volume: | 28 |
Número: | 2 |
Página Inicial: | 146 |
Página Final: | 151 |
Palavras-chave: | SURFACE ROUGHNESS DENTURES SOFT LINERS RUGOSIDADE SUPERFICIAL DENTADURAS REEMBASADORES |
Resumo: | AIM: To evaluate the surface alterations of soft liners with or without sealer coating following abrasion with mechanical brushing. METHODS: Thirty specimens were made of a methacrylate- (Coe-Soft) and a siloxane-based material (Ufi-Gel SC), and 15 received two coatings of surface sealer. The specimens were submitted to a mechanical brushing-dentifrice assay under 200g of force at 250 cycles/min. Mechanical brushing was simulated for a period of 1 (1250 cycles) and 6 months (5000 cycles). Surface roughness (Ra parameter) was measured, and scanning electron microscopy (SEM) images were obtained. Ra data were analysed by anova for repeated measures and Bonferroni's test (alpha=0.05). RESULTS: Ra increased from baseline to 6 months regardless of sealer coating. At baseline, only Coe-Soft without sealer had a higher Ra than the other groups. After 1 month, the Ra of Coe-Soft with sealer was three-fold higher than the Ra at baseline; the other groups showed no significant increase of Ra. SEM images showed degradation of the soft liners over time, except for the Ufi-Gel SC with sealer, which displayed minimum alteration of surface texture. CONCLUSION: Sealer coating reduced the surface degradation of the tested soft liners, but the protective effect was more pronounced for the siloxane-based material. |
URI: | http://hdl.handle.net/10923/828 |
DOI: | 10.1111/j.1741-2358.2010.00375.x |
PMID: | 21054504 |
ISSN: | 1741-2358 |
Aparece nas Coleções: | Artigo de Periódico
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