IRCT201707269014N176.

Study name	Comparison of the effect of Nd:YAG laser, diode laser and CPP/ACP on treatment of patient with dentin hypersensitivity: a randomized clinical trial
Methods	RCT
Participants	7 patients with 8 teeth each Age: 18 to 65 years Inclusion criteria: age of 18 to 65 years; dentine hypersensitivity; suitable plaque index with no pocket Exclusion criteria: pregnancy or breastfeeding; systemic disease; periodontal surgery during the last 6 months; whitening treatment of teeth in the last 6 months; using antihypersensitivity and anti‐inflammatory mouthwash or toothpaste during the last 72 hours; using antidepressive drugs; using orthodontic devices; the presence of fractures, cracks, decay and deep repair in the teeth and adjacent teeth
Interventions	Group 1: Nd:YAG laser Group 2: diode laser Group 3: casein phosphopeptide phosphate calcium amorphic gel Group 4: no treatment
Outcomes	VAS after 1 hour
Starting date	31 October 2016
Contact information	Jalal Poorolajal, poorolajal@umsha.ac.ir
Notes	No blinding of participants or examiners