IRCT2015102624715N1.

Study name	Efficacy of 940 nm diode laser on the treatment of dentin hypersensitivity in periodontal maintenance patients
Methods	RCT, split‐mouth design Sample size: 45 teeth Study duration: 30 days
Participants	Age: 22 to 57 years Inclusion criteria: individuals who have passed 1st phase of periodontal treatments and have dentine hypersensitivity in teeth with no caries, fracture; any clear tooth crack, fillings and periapical lesion, which will respond to both air and tactile stimuli application tests Exclusion criteria: individuals with systemic diseases; allergy to materials used in the study; smokers; individuals with active periodontal diseases; pregnant and lactating women; patients who have received treatments related to increased tooth sensitivity; teeth with occlusal overload and recent occlusal re‐adjustment therapy
Interventions	Group 1: control group: placebo Group 2: potassium fluoride gel 2% Group 3: laser diode of 940 wavelength Group 4: laser + potassium fluoride gel 2%
Outcomes	Sensitivity to air and tactile stimulation using VAS score
Starting date	11 January 2016
Contact information	Tahere Pourseyedian, th.1362@yahoo.com
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