1Mujdeci A,Gokay O.Effect of bleaching agents on the mi-crohardness of tooth-colored restorative materials[J].J Prosthet Dent,2006,95(4):286.
2Taher NM.The effect of bleaching agents on the surface hardness of tooth colored restorative materials[J].J Cont-emp Dent Pract,2005,6(2):18.
3Gurgan S,Yalcin F.The effect of2different bleaching reg-imens on the surface roughness and hardness of tooth-col-ored restorative materials[J].Quintessence Int,2007,238(2):e83.
4Okte Z,Villalta P,Garcia-Godoy F,et al.Surface hard-ness of resin composites after staining and bleaching[J].Oper Dent,2006,31(5):623.
5Polydorou O,Monting JS,Hellwig E,et al.Effect of in-office tooth bleaching on the microhardness of six dental es-thetic restorative materials[J].Dent Mater,2007,23(2):153.
6Li Q,Yu H,Wang Y.Colour and surface analysis of car-bamide peroxide bleaching effects on the dental restorative materials in situ[J].J Dent,2009,37(5):348.
7Polydorou O,Hellwig E,Auschill TM.The effect of at-home bleaching on the microhardness of six esthetic restor-ative materials[J].J Am Dent Assoc,2007,138(7):978.
8Polydorou O,Beiter J,Konig A,et al.Effect of bleaching on the elution of monomers from modern dental composite materials[J].Dent Mater,2009,25(2):254.