An AFM evaluation of the effect of 37.5% hydrogen peroxide on sealed and unsealed aged composite materials
Journal Title: International Dental Journal of Student Research - Year 2016, Vol 4, Issue 4
Abstract
Objective: The aim of this study was to evaluate the surface roughness of sealed and unsealed composite resins bleached with 37.5% hydrogen peroxide. Materials and Methods: Eight discs, 9 mm in diameter and one mm in thickness, were prepared from two shades (A1) of two composite resins, i.e. Filtek Z250 and Filtek Z350 XT. The specimens were polished and subjected to accelerated aging before bleaching. Half of the surface of each specimen was sealed with BisCover LV. Surface roughness was determined using Atomic Force Microscope (AFM) software before and after bleaching; 37.5% hydrogen peroxide was applied to the specimens for bleaching, and surface roughness was measured with AFM software. Surface roughness was evaluated by three parameters, i.e. roughness profile (Ra), height of the profile (Rz), and width of the profile (Rq). Data were statistically analyzed by two-way repeated measures ANOVA and t-test.
Authors and Affiliations
Mahdisiar F, Nasoohi N, Hoorizad M, Mirhashemi M, Zavareian S
Keywords
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