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Journal ID : TMJ-29-09-2022-11408
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Title : Efficacy of 810 nm Diode laser and Nd:YAG laser in the treatment of dentinal hypersensitivity : An in-vivo study with split mouth technique

Abstract :

Dentin hypersensitivity has been defined as a short, sharp pain caused by exposure of the exposed dentin to an external stimulus, such as heat, cold, some acidic liquids, and tactile. The use of laser has become more popular recently and appears to be a promising treatment method in this field. The aim of the study is to compare the effectiveness of both the Nd:YAG laser and the 810nm diode laser in the treatment of dentinal hypersensitivity on a sample of patients from Syrian population. This study was conducted on 100 teeth in six patients (2 females and 4 males) suffering from dentinal hypersensitivity. The sample was randomly divided into two groups, each group contains 50 teeth, G1 (Nd: YAG laser 1 w, 10 Hz, 100 mJ, 20s repeated 4 times with 20s interval), G2 (diode laser 810nm 1 W, continuous mode, 30s, repeated 3 times with 20s interval). Each group was divided by the split mouth technique into two categories containing 25 teeth each. The first category was treated by application of the laser alone towards the target area, and the second category treated by application of sodium fluoride gel for one minute, and then the laser was applied with the same settings as the first category. The pain was evaluated using a numeric rating scale (NRS) of 100 degrees before, immediately after treatment, and after (3 - 6 and 9) months by applying an air stream from a dental chair syringe at a distance of 0.5 cm from the target area. The results of this study showed that both types of laser was effective in treating pain caused by dentinal hypersensitivity. The average values of pain reduction on the numeric rating scale (NRS) showed the superiority of the Nd: YAG laser over the 810nm Diode laser after treatment, and at all stages of observation. Although no statistical significant differences appeared between laser application alone and combined application of laser after sodium fluoride gel in pain reduction values, the combined technique resulted in slightly more pain reduction than the laser application alone. Based on the results of this study, it can be concluded that the effectiveness of applying both 810nm diode laser / Nd: YAG laser alone and in combination with sodium fluoride gel is confirmed. In addition, the use of 810nm diode laser can be considered as a simple, reliable, and cost effective treatment method when compared with the use of Nd: YAG laser, which have an expensive operational charges that are not suitable for all patients.

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