Treatment of dentin hypersensitivity by Nd:YAG laser.

Our previous study indicated that dentin surface irradiated with an Nd:YAG laser at an energy output of 30 mJ, 10 pulses/sec (pps), for 2 min resulted in a melted surface and a closure of exposed dentinal tubules orifices, but without dentin surface cracking. The purpose of this study is to evaluate the effectiveness of the Nd:YAG laser in the treatment of dentin hypersensitivity. Thirty subjects participated in this study and were followed for 3 months. Two sites of dentin hypersensitivity in a patient were treated; one received Nd:YAG laser treatment and the other served as control. Dentin hypersensitivity was assessed by mechanical and thermal stimulus. Pulpal vitality was measured using an electrical stimulus. The Nd:YAG laser treatment reduced dentin hypersensitivity to air by 65% and to mechanical stimulus by 72% over 3 months. All teeth remained vital after laser treatment, without adverse reactions or complications. In conclusion, the Nd:YAG laser can be used to reduce dentin hypersensitivity without detrimental pulpal effects.