Application of Nd: YAG Laser Irradiation with Dentin Coating Materials to Dentin Hypersensitivity Treatment

Abstract

The purpose of this study was to evaluate the application of Nd: YAG laser irradiation with dentin coating to dentin hypersensitivity.
The Nd: YAG laser irradiation protocol was evaluated and approved by the Tsurumi Dental University Human Study Review Committee before the initiation of any treatment to patients. Ten adult male patient volunteers participated in this study. The cervical exposed dentin areas were coated with 1) primer (ALL-BOND2), surface sealant (FORTIFY BISCO) and 2) primer and bonding agent bonding system (Clearfil SE Bond, Kuraray, Japan).
Nd: YAG laser (INCISIVE, USA) was irradiated to the cervical area (30sec×2 times: level of 100mJ pulses at 15 pulses/sec). All pulp responses were measured by pulp vitality/sensitivity with an electric pulp tester (Analytic Technology, Redmond, WA) before and after dentin coating treatment and laser irradiation treatment.
The threshold values of the electric pulp test showed 1) 33.5±5.25 (control), 43.0±5.25 (dentin coating treatment) and 45.1±7.92 (laser irradiation treatment), and 2) 31.04±6.08 (control) 42.50±4.56 (dentin coating treatment) and 45.50±2.40 (laser irradiation treatment).
The threshold values of the electric pulp test after dentin coating treatment and laser irradiation treatment were significantly higher (p<0.01) than the control. This study suggested that application of Nd: YAG laser irradiation with dentin coating may be useful for relieving the pain of dentin hypersensitivity.