Comparison of Er,Cr:YSGG and diode laser effects on dentin hypersensitivity: a split-mouth randomized clinical trial.

OBJECTIVES: The aim of the present study was to compare the clinical efficacy of diode laser and Er,Cr:YSGG lasers in the treatment of dentin hypersensitivity. MATERIALS AND METHODS: Thirty-four teeth from 17 patients with dentin hypersensitivity were divided into two groups. In group D, the teeth were irradiated with diode laser beams with a wavelength of 940 nm for 1 min, and in group E, the teeth were irradiated with Er,Cr:YSGG laser beams with a wavelength of 2780 nm and a pulse width of 140-200 µs. Treatments with laser beams were carried out in 1 session. Sensitivity was assessed with air spray and a dental explorer. Pain severity was measured with the use of visual analog scale (VAS) before and after laser application. RESULTS: A decrease in dentin hypersensitivity was observed in both groups immediately, 1 week, and 1 month after laser irradiation. Statistically significant differences were found between the two groups in dentin hypersensitivity severity only 1 month after laser application. The decrease in dentin hypersensitivity by Er,Cr:YSGG laser was significantly higher than that by diode laser at this time interval. CONCLUSION: The decrease in dentin hypersensitivity after application of Er,Cr:YSGG laser was significantly higher than that after the application of diode laser at 1-month postoperative interval. CLINICAL RELEVANCE: Er,Cr:YSGG laser is a better choice than diode laser for the treatment of dentin hypersensitivity in the short term.

Comparing the Effect of Phenytoin Syrup and Triamcinolone Acetonide Ointment on Aphthous Ulcers in Patients with Behcet's Syndrome.

BACKGROUND: Recurrent aphthous stomatitis (RAS) appears to be the most common type of oral ulcers. The lesion is usually self limited but its painful presentation results in some difficulties. Therefore, an efficient therapeutic strategy is required and currently existing therapies seem to be inadequate because of its unclear etiology. Here the therapeutic effect of triamcinolone acetonide ointment as a relatively expensive medication has been compared with phenytoin syrup on aphthous ulcers in patients with Behcet's syndrome. METHODS: Thirty out of 60 our patients with Behcet's syndrome were randomly treated by phenytoin syrup and the remaining were advised to use 0.1% triamcinolone acetonide ointment. After a week, they were visited again to determine the status of aphthous ulcers. RESULT: Positive response in the triamcinolone acetonide group and phenytoin group was 86.7% and 53.3%, respectively. CONCLUSION: The effectiveness of triamcinolone acetonide ointment was more than phenytoin on aphthous ulcers in patients with Behcet's syndrome.