There is no accurate diagnosis method for bruxism for now. Consequences of bruxism over teeth, muscles and articulation of the jaw are important.

This study aims to develop a innovative tool in order to accurately rapidly diagnose bruxism in ambulatory evaluation.

Inclusion Criteria:

• adult from 18-70

• patients diagnosed with bruxism according to the following criteria:

• positive question at one of the following question:

  • are you aware of your grinding?
  • does your partner hear you grinding?
  • are you aware that you are frequently tighten your jaws during the day and/or the night?
  • are you tired and/or do experience jaws 'muscular pain in the morning.

• presence of at least one criteria:

  • abnormal tooth wear or tooth prosthesis damages
  • Hypertrophy of the masseter muscles

• patients agreeing to participate

• patient able to understand and follow the protocol

• patient with health insurance

Exclusion Criteria:

• patients with more than 2 missing tooth
• Severe troubles to correctly close the mouth.
• neurological disorder (Parkinson, Alzheimer) or psychiatric disorder
• Sleep disorder (insomnia, narcolepsy, sleep apnea, restless leg disorder)
• use of drugs that potentially impair sleep (benzodiazepines, neuroleptics, tricyclic antidepressants) alcohol or narcotics.
• complete or partial removal dental prosthesis or orthodontic device
• Patient under legal protection
• pregnant women
• Patients deprived of their freedom by a judicial or administrative decision