The aim of the present report is to evaluate the amino fluoride gel with or without application of diode laser on pain due to dentine hypersensitivity.

NRS (numerical rating scale) index will be used to evaluate the pain suffered by each patient after cold air blow stimulus.

After treatment application, the follow-up timing planned for each patient will be at 1 week, 1 month, 3 months and 6 months

The aim of the present report is to evaluate the amino fluoride gel with or without application of diode laser on pain due to dentine hypersensitivity.

The study is designed with a split mouth design. NRS (numerical rating scale) index will be used to evaluate the pain suffered by each patient. The pain response will be stimulated by thermal urge (cold air blow). Teeth will be divided in two groups. The treatment group, treated with 980nm diode laser and amino fluoride gel; the control group, treated only with amino fluoride gel.

The follow-up timing planned for each patient will be at 1 week, 1 month, 3 months and 6 months. In these follow-up sessions a revaluation of the pain response is performed using the NRS index.

Inclusion Criteria:

• Teeth in good periodontal health
• Good oral hygiene
• Dentine hypersensitivity: NRS (Numerical Rating Scale) ≥ 3

Exclusion Criteria:

• Teeth local disease or fractures in treatment area
• Irreversible teeth necrosis or pulpitis
• Definitive restorations or veneers
• Recent use of painkillers or anti-inflammatory drugs,
• Treatment for dentine Hypersensitivity less than 6 months before the study start
• Therapies contraindication