Bond strength of composite resin to dentin irradiated with Er : YAG laser

概要

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We compared the bond strength of composite resin to ground dentin and to Er : YAG laser irradiated dentin using three types of dentin adhesive systems : Single Bond, which is an acid etch/wet bonding agent, Clearfil Megabond, which is a self-etching/bonding agent, and Reactmerbond, which is an all in one self-etching bonding agent. Tensile bond strength was measured with and without thermocycling (TC). The mean and standard deviation of the tensile bond strength in MPa with and without thermocycling were : for the Ground Group was 14.1 (2.8)/13.2 (2.9) for Single Bond, 28.5 (4.6)/22.7 (4.2) for Megabond, and 9.5 (2.3)/8.1 (2.3) for Reactmerbond. For the Laser Irradiation Group it was 6.6 (1.4)/6.4 (2.6) for Single Bond, 5.2 (1.8)/4.8 (2.3) for Megabond, and 5.6 (1.0)/5.5 (1.5) for Reactmerbond. The tensile bond strengths for the laser treatment groups were significantly less than for the ground groups. We concluded that Er : YAG laser irradiated dentin is unsuitable for adhesion of composite resin.
大阪歯科学会の論文