Purpose: Dentin hypersensitivity is a common complaint associated with high dental pain. Low-intensity laser therapy (LILT) can minimize this clinical problem without causing any discomfort to patients. A new LED-based (light-emitting diode) light source has been used as an experimental tool in some studies. The main objective was to compare the effects of LILT and LED on dentinal hypersensitivity. Materials and Methods: A total of 144 teeth with cervical hypersensitivity were treated in 6 sessions, consisting of 3 irradiation sessions and 3 follow-ups. This single-blind study compared a control group (placebo) and two test groups: low-intensity laser and an LED system, emitting in the same spectral band (red, from 630 to 660 nm) but using different operation modes (coherent and non-coherent beam). Two vitality tests (cold and heat) and one sensitivity test (air blast) was used. Results: In the first and third sessions, all of the treatments were similar; in the second session LILT and LED performed similarly, both showing better treatment results than the control. In the follow-up of 15 days, all of the treatments were similar and effective; after 60 days, all the teeth given LILT showed the best results, with absence of pain in the air blast tests. Conclusion: These results showed that two sessions seem to be enough for this treatment. In conclusion, given this protocol, LILT and LED treatment were effective in reducing dentin hypersensitivity. However, with these parameters, LILT seemed to be the best therapeutic method.
Keywords: low-intensity laser therapy, light-emitting diode therapy, dentin hypersensitivity, pain relief