FTIR STRESS RATE ENDODONTIA COMPÓSITO RESTAURADOR DEGREE OF CONVERSION PUSH OUT BOND STRENGTH CURING METHODS EXPERIMENTAL COMPOSITES COMPOSITE RESTORATIVES PHOTOACTIVATION LIGHT SOURCES IRRADIANCE PUSH-OUT CINÉTICA DE POLIMERIZAÇÃO CIMENTO RESINOSO COMPOSITE RESTORATIVE COMPOSITE PUSH OUT BOND STRENGTH RESTORATIVE COMPOSITES COMPÓSITOS RESTAURADORES EXPERIMENTAIS COMPOSITE RESIN