Effect of 1064 nm Nd:YAG laser or 15% calcium sodium phosphosilicate prophy paste on dentin hypersensitivity over six...

The study had the main purpose of comparing the desensitizing effect of Nd:YAG laser (1064 nm) and a 15% calcium sodium phosphosilicate paste (CSP-NovaMin) for the treatment of cervical dentin hypersensitivity (CDH) throughout the 6-month follow-up period (TRN #2291636, Sep/2017). In total, 67 patients were selected after a baseline evaluation with a visual analog scale, including middling and severe pain levels, above 4 cm at the scale. Patients were randomly allocated to one of the groups: Nd:YAG laser (100 mJ, 1W, 10 Hz, 83.3 J/cm²) or CSP prophy paste (60-s prophylaxis, rubber cup at low speed). Patients were treated in a single session and pain was assessed immediately, 3 months and 6 months after treatments. When more than one tooth presented CDH, a mean score per patient was considered. Patients were blind to the treatments and pain values, pain evaluator was blind to the treatments and the operator was blind to pain data. Pain relief data and absolute values were analyzed. There was no difference in pain relief between treatments and experimental time-intervals (p > 0.05). Absolute values for pain showed significant reduction in pain immediately after treatments for both groups (p < 0.05). After 6 months, pain level for Nd:YAG laser group continued to decrease (p < 0.05) while for CSP group this did not change (p > 0.05). For both groups, pain was lower than at baseline after 6 months. Both treatments were efficient in reducing CDH over 6 months and Nd:YAG laser group showed the lowest pain levels. Nd:YAG laser and CSP prophy paste should be considered efficient treatments for CDH with positive immediate and long-term effects.