title: Evaluation of the effect of low level laser therapy toothbrush in treatment of dentin hypersensitivity.
abstract: BACKGROUND
  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).
  
  
  CONCLUSIONS
  Both sensodyne and laser tooth brushes improve dentin hypersensitivity, although the laser toothbrush led to better results in short.
authors.affiliation: Dental Materials Research Center, Department of Periodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Jaber
authors.initials: J
authors.lastname: Yaghini
authors.affiliation: Dental Implannts Research Center, Department of Periodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Ahmad
authors.initials: A
authors.lastname: Mogharehabed
authors.affiliation: Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Nassimeh
authors.initials: N
authors.lastname: Safavi
authors.affiliation: School of Dentistry, Esfahan University of Medical Sciences, Esfahan, Iran.
authors.forename: Mehrnush
authors.initials: M
authors.lastname: Mohamadi
authors.affiliation: School of Dentistry, Esfahan University of Medical Sciences, Esfahan, Iran.
authors.forename: Fahime
authors.initials: F
authors.lastname: Ashtiju
keywords: dentin; diode laser; hypersensitivity; laser therapy; low level