2) CHEN JH. Effect of etchant, etching period, and silane priming on bond strength to porcelain of composite resin. Oper Dent. (1998) vol.23, p.250-257.
3) PILLAR RM. Fracture toughness of dental composite determined using short-rod fracture toughness test. J Dent Res. (1986) vol.65, p.1308-1314.
4) CALAIS JG. Influence of filler type and water exposure on flexural strength of experimental composite resin. J Dent Res. (1988) vol.67, p.836-840.
5) FERRACANE JL. Solvent degradation and reduced fracture toughness in aged composite. J Dent Res. (1992) vol.71, p.13-19.