malocclusion
Conditions
Interventions
Experimental group 1:Lingual implant nails combined with personalized U-shaped palatal rod
Experimental group 2:Buccal mini-screw
Experimental group 3:Class II elastic
Sponsors
Peking University School of Stomatology
Eligibility
Sex/Gender
All
Age
18 Years to No maximum
Inclusion criteria
Inclusion criteria: 1.Permanent dentition, Ann's class II adult patients, low or average angle, mild to moderate crowding of the maxillary, distance of molars 2-3mm; 2.The patient has no third molar, or the third molar has been extracted; the patient has good compliance and insists on wearing the appliance for more than 22 hours; 3.The shape of the teeth is good, the second molars have fully erupted and established, and the crown height is sufficient.
Exclusion criteria
Exclusion criteria: 1.Minor patients younger than 18 years old; 2.Ann's class II patients with severe skeletal deformities or in need of extraction and correction.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The efficient of molar distalization; | — |
Secondary
| Measure | Time frame |
|---|---|
| Changes in molar position and angle;Changes in incisor position and angle;Changes in alveolar bone; | — |
Countries
China
Contacts
Public ContactLi Weiran
Department of Orthodontics, Peking University School of Stomatology
Outcome results
None listed