Volume 26, Issue 1 (15 2013)                   jdm 2013, 26(1): 33-41 | Back to browse issues page

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Hasani Tabatabaei M, Arami S, Pahlavan A, Yasini E, Mirzae M, Kermanshah H et al . Profilometeric and SEM evaluation of effect of polishing on surface roughness of two composites (silorane-based and methylmethacrylate-based) and a Glass Ionomer. jdm. 2013; 26 (1) :33-41
URL: http://jdm.tums.ac.ir/article-1-5-en.html
Abstract:   (4385 Views)

Background and Aims: To evaluate the effect of polishing on surface roughness of silorane-based composite using profilometery and Scanning Election Microscopy (SEM) and compare it with that of a methylmethacrylate-based composite and a glass ionomer.

Materials and Methods: In this study, 3 groups (n=28) were tested: specimens of two composites (Filtek P90 and Filtek P60) and a glass ionomer (Fuji IX) which were prepared in polyethylene molds (4 mm diameter×10 mm height). Half of the specimens in each group were finished with 180-grit silicon carbide paper and the remaining were finished with 180-grit, and subsequently polished with 250, 400, 800, 1000, 2000, and 2500-grit silicon carbide papers. The surface roughness was evaluated using a contact profilometer and then mean (Ra) and maximum (Rmax) of surface roughness were recorded. Then, the surface of 4 specimens of each subgroup was observed under SEM. Statistical analysis was performed with T-test, ANOVA and Dunnett T3 tests.

Results: In all materials, Ra was different between polishing with 180 and 2500-grit silicon carbide papers. In 180-grit group, only Ra of Filtek P60 and Fuji IX showed significant difference (P=0.01). In 2500-grit group, there was no significant difference between the Ra of Filtek P60 and Filtek P90 (P=0.56).

Conclusion: Polishing is recommended for the glass ionomer and posterior composite restorations.

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Type of Study: Research | Subject: general
Received: 2012/06/21 | Accepted: 2013/03/3 | Published: 2013/09/15

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