Skeletal Class II malocclusion
Conditions
Interventions
Test group:Twin-block orthopedic treatment
Sponsors
School and Hospital of Stomatology, Jilin University
Eligibility
Sex/Gender
All
Age
7 Years to 14 Years
Inclusion criteria
Inclusion criteria: Twin block pre treatment criteria (1) Angular Class II Class 1 malocclusion; (2) The development of the maxilla is normal or slightly overdeveloped, while the development of the mandible is insufficient; (3) From a side view, the appearance is poor, with obvious underdevelopment of the mandible, chin retraction, and significant improvement in the lateral appearance when the mandible extends forward to the incision; (4) There is no obvious crowding or unevenness in the lower anterior teeth; (5) According to the cervical maturity analysis method, the patient was in CS1-CS3 before treatment; (6) Upper and lower tooth slot seat angle (ANB angle)>= 4.5 °; (7) The value of mandibular plane angle FMA is = 28 °; Twin-block patients who have just completed early correction and have not yet undergone secondary treatment that meet the above criteria
Exclusion criteria
Exclusion criteria: (1) Systemic diseases, syndromes, congenital abnormalities; (2) History of orthodontic treatment; (3) Facial deviation; (4) Have a history of jawbone trauma.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| nasolabial angle;Chin labial angle;G-Sn-Pos;Angle between upper and lower lips;Nasal base width;Nasal alar width; | — |
Countries
China
Contacts
Public ContactHu Min
1500 Qinghua Road, Chaoyang District, Changchun, Jilin
Outcome results
None listed