Effect of finishing and polishing on surface roughness of composite resins after bleaching
Braz. j. oral sci
;
13(2): 158-162, Apr-Jun/2014. tab, graf
Article
in English
| LILACS
| ID: lil-715604
ABSTRACT
AIM:
To evaluate the influence of finishing and polishing techniques on the surface roughness of two composite resins (CRs) subjected to bleaching procedure.METHODS:
Forty-eight CR specimens were divided into six groups (n=8). For G1 to G3, a microhybrid CR (Opallis; FGM) was used, and G4 to G6, received a nanohybrid CR (Brilliant NewLine; Coltène/Whaledent). All specimens were subjected to bleaching procedure with 35% hydrogen peroxide (two 45-min applications, with a 5-day interval). The surface roughness of all specimens was evaluated before and after the bleaching and/or finishing/polishing (Ra parameter) by a roughness meter. After bleaching, the groups were subjected to finishing and polishing procedures G2 and G5 - felt discs + diamond pastes; and G3 and G6 - silicon rubber tips. The control groups (G1 and G4) had no finishing or polishing treatment after bleaching. Data were analyzed by ANOVA and Tukey's post-test, and t test for paired samples (a=0.05).RESULTS:
bleaching treatment increased Ra values for the nanohybrid CR specimens, but both finishing/polishing techniques were able to reduce these values; for the microhybrid specimens, only finishing/polishing with silicon rubber tips decreased the roughness values.CONCLUSIONS:
For both microhybrid and nanohybrid CRs, the silicon rubber tips were effective to reduce the surface roughness after bleaching procedure...
Full text:
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Index:
LILACS (Americas)
Main subject:
Silicone Elastomers
/
Tooth Bleaching
/
Composite Resins
/
Dental Polishing
/
Hydrogen Peroxide
/
Anti-Infective Agents, Local
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2014
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Universidade Estadual de Ponta Grossa/BR
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