TY  - JOUR 
T1  - Effects of different concentrations of carbamide peroxide and bleaching periods on the roughness of dental ceramics
JO  - Brazilian Oral Research
A1  - Ourique, Sérgio Augusto Morey
A1  - Arrais, César Augusto Galvão
A1  - Cassoni, Alessandra
A1  - Ota-Tsuzuki, Cláudia
A1  - Rodrigues, José Augusto
SN  - 1806-8324
UL  - 10.1590/S1806-83242011000500013
VL  - 25 
Y1  - 2011
PB  - Brasil 
ER  -