Safety and Efficacy of the ToothWave Power Toothbrush for Extrinsic Stain Reduction

Inclusion Criteria: 1. Adult subjects aged 18-70, that are in good health. 2. Subjects should have notable extrinsic dental stains on the front teeth with a total extrin-sic facial tooth stain score ≥14 according to the LSI. 3. The subjects should understand the information provided about the investigative nature of the treatment, possible benefits and side effects. Subjects will sign the Informed Consent Form. 4. The subjects should be willing to comply with the study procedure and schedule, includ-ing the follow up visits, and will refrain from using any other teeth whitening technologies during this period. 5. The subject did not perform any procedure for teeth whitening (either at home or in clin-ic) at least 3 years prior to participating in the study Exclusion Criteria: 1. Any condition that might make it unsafe for the subject to participate in the study, at the discretion of the investigator 2. Pacemaker or internal defibrillator, or any other active electrical implant anywhere in the body. 3. Pregnant or nursing by subject report. 4. Any active condition in the oral cavity at the discretion of the investigator. 5. Any surgery in the treated area within 3 months prior to treatment, or before complete healing. 6. Subjects that do not brush regularly. 7. Regular tobacco smokers.