Misalignment of teeth
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: 1. Objects with normal growth and development; 2. The objects with good oral hygiene and no caries or fillings; 3. The subjects with healthy periodontal tissue had no attachment loss, the depth of probing <= 3 mm, and no bleeding; 4. Dentition 26-16, 36-46; 5. Patients with class II malocclusion caused by maxillary molar forward movement and mild to moderate upper dentition crowding; 6. The subjects with normal or basically normal lower dentition.
Exclusion criteria
Exclusion criteria: 1. Subjects with systemic diseases; 2. Subjects with bad habits such as mouth breathing, smoking or drinking; 3. Those who had severe bone deformity or growth abnormality, tendency to open or close, had disorder of temporomandibular joint.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Periodontal Index;distal movement distance;gingival crevicular fluid change; | — |
Countries
China
Contacts
Shanghai Fifth People's Hospital