Objective:To investigate the effects of Er:YAG laser irradiation on micro-shear bond strength of an all-in--one bonding system for cervical dentin over a period of 1year.Methods:Sixty cervical dentin slices obtained from extracted human third molars were prepared.After surface treatments by Er:YAG laser irradiation or600-grit silicon paper polishing,the micro-shear bond strength of Tri-S Bond to cervical dentin were tested after24hours(24H),7days(7D),6months(6M)and 1year(1Y).The results were statistically a...