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Type: article
Title: Surface changes in denture soft liners with and without sealer coating after mechanical brushing abrasion
Author(s): Mainieri, Vivian Chiada
Beck, Joaquim
Oshima, Hugo Mitsuo Silva
Hirakata, Luciana Mayumi
Shinkai, Rosemary Sadami Arai
Publisher: Blackwell Publishing
Issue Date: 2011
Volume: 28
Issue: 2
First page: 146
Last page: 151
Abstract: 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.
DOI: 10.1111/j.1741-2358.2010.00375.x
PMID: 21054504
ISSN: 1741-2358
Appears in Collections:Artigo de Periódico

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