evaluation of the effect of low level laser therapy toothbrush in treatment of dentin hypersensitivity

introduction: dentin hypersensitivity is one of the most common complications that affect patients after periodontal therapy. recently low level laser therapy has been introduced as a new treatment modality and has produced beneficial results. the purpose of this study is to evaluate the effect of low level laser therapy toothbrushes in reduction of dentin hypersensitivity. methods: in this pilot interventional controlled clinical trial, 40 patients suffering from dentin hypersensitivity were selected using simple randomization. half of the patients were given laser toothbrushes and the other half was given non-laser sensodyne toothbrushes. primary dentin hypersensitivity was recorded by visual analogue scale (vas) score and ice spray. then dentin hypersensitivity was measured right after the treatment as well az in the intervals of 1 month and 2 months after initiation of the study. data were compared using statistical package for the social sciences (spss) software and analysis of variance (anova) paired t test. results: the results of this study showed that there was a significant difference in each of the two kinds of tooth brushes separately for all time intervals (p < 0.001). also the effect of the type of toothbrush was investigated using before treatment vas with covariance analyses. p values for immediately, 1 month and 2 months after treatment were calculated to be 0.078, 0.02, 0.01 respectfully. also the effect of the toothbrush type was significant in the manner that laser toothbrushes reduce dentin hypersensitivity more than ordinary toothbrushes (p< 0.05). conclusion: both sensodyne and laser tooth brushes improve dentin hypersensitivity, although the laser toothbrush led to better results in short.