Effects of various finishing systems on the surface roughness and staining susceptibility of packable composite resins.
OBJECTIVE
The purpose of the present study was to investigate the influence of various finishing systems on the surface roughness and staining of three packable resin composites and a conventional microhybrid one.


METHODS
Three packable composites (Solitaire-Heraeus-Kulzer, ALERT-Jeneric-Pentron, SureFil-Dentsply) and a conventional microhybrid (Z250-3M-ESPE) were used. Composite specimens were prepared and polished with Poli I and Poli II aluminum oxide pastes, Ultralap diamond paste, Enhance finishing points, Politip rubber polishers, fine and extra fine diamond burs, and 30-blade tungsten carbide burs according to the manufacturers' instructions. The polished surfaces were evaluated with a profilometer, and then immersed in 2% methylene blue for 24h. Afterwards, the specimens were prepared for the spectrophotometric analysis. Results were statistically analyzed by ANOVA and Tukey test.


RESULTS
Significant differences were found for the surface roughness and staining recorded, with interaction among composite resins and the finishing systems used. No correlation was found between surface roughness and staining susceptibility (p=0.5657).


CONCLUSIONS
For most of the polishing agents used, Z250 presented the smoothest surfaces and the least dye uptake. ALERT presented the roughest surfaces, and Solitaire, the highest dye concentration. The smoothest surfaces were not necessarily the most stain resistant. Staining is highly influenced by each composite monomer and filler composition.
Reis
André F
AF
Department of Restorative Dentistry, Piracicaba School of Dentistry, Campinas State University, Av Limerira 901, 13414 018, Sao Paulo, Piracicaba, Brazil. reisandre@yahoo.com
Giannini
Marcelo
M
Lovadino
José R
JR
Ambrosano
Gláucia M
GM
D000704:Analysis of Variance; D003116:Color; D003124:Colorimetry; D003188:Composite Resins; D003775:Dental Polishing / Q000295:instrumentation / Q000379:methods*; D016014:Linear Models; D008422:Materials Testing; D017797:Prosthesis Coloring; D013053:Spectrophotometry; D018709:Statistics, Nonparametric; D013499:Surface Properties
C406265:Alert composite resin; D003188:Composite Resins; C444701:Filtek Z250; C113049:Solitaire composite resin; C403464:SureFil packable composite