ChiCTR‐INR‐16010245.

Study name	Clinical outcomes research of the effect of Er:YAG in treating abrasion caused dentin hypersensitivity: a randomized controlled study
Methods	Parallel RCT
Participants	Inclusion criteria: 1. patients must have subjective symptom of dentine hypersensitivity caused by abrasion, and the study teeth must be filling free and restoration free; 2. patients must not have used desensitizing toothpaste within the past 3 months, undergone desensitization treatment with desensitizer within the past 1 year, or undergone the desensitization treatment with laser; 3. there must be no caries, crack or other factors which might impact therapy to the study teeth. No other dental therapy except for desensitization to the study teeth; 4. patients must be able to read and understand the consent form and be willing to sign it Exclusion criteria: 1. teeth that have be treated with periodontal surgery within the past 6 months or scaling/root planning within the past 3 months; 2. patients have the contraindications with the laser treatment; 3. patients are not able to independently or accurately describe their self‐subjective feeling; 4. patients suffer from the chronic diseases or pain; 5. patients suffer from serious physical or mental diseases; 6. patients have undergone other clinical trial; 7. patients have history of drug and alcohol addiction; 8. patients are currently being treated with drugs which may influence the sensory nerve or the dental disease
Interventions	Group 1: Gluma desensitizer Group 2: Er:YAG
Outcomes	VAS, immediately after, 1 week after, 1 month after, 3 months after, 6 months after, and 1 year after air stimulus, slight pressure stimulus and cold stimulus
Starting date	‐
Contact information	cyj1229@fmmu.edu.cn
Notes	‐