Extrinsic tooth stain
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: (1) Age between 18-55 years old, no limitation in gender. (2) Good general health, no serious systemic diseases (3) The 8 incisors were naturally arranged neatly, and there was no large area of filling or crown restoration; (4) The teeth had extrinsic stain, and the color value of the Vita shadeguide of the anterior teeth is >1M1.5 (5) Voluntarily participate in trials, comply with clinical trial requirements, and follow up on time.
Exclusion criteria
Exclusion criteria: 1) The tested teeth had untreated caries, mucosal disease, dentin sensitivity, pericoronitis, periodontitis and other diseases; (2) The tested tooth has crown restoration, wearing denture or orthodontic device, etc (3) The tested teeth had extensive restoration, suspected pulpitis, caries, enamel cracks and so on (4) Severe or atypical intrisic staining of the tested teeth (5) Allergic persons (mainly refers to those who are allergic to the product ingredients such as hydrogen peroxide) (6) women during pregnancy and breastfeeding (7) Use other teeth whitening products within the past 3 months; (8) Taking anticonvulsants, antihistamines, antidepressants, sedatives, tranquilizers, anti-inflammatory agents, analgesics; (9) Patients with serious primary diseases such as cardiovascular, liver, kidney and hematopoietic system and diseases such as neuropsychiatric system; (10) Patients with oral soft and hard tissue tumors; (11) Subjects also participated in other clinical trials and did not meet the clinical endpoint (12) Subjects deemed unsuitable for inclusion by the investigator.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| shade value of Vita Easyshade Computer colorimeter ; | — |
Secondary
| Measure | Time frame |
|---|---|
| shade value of Vita guide; | — |
Countries
CHINA
Contacts
West China Hospital of Stomatology, Sichuan University