Class ?, division? malocclusion
Conditions
Interventions
MRC group:wearing MRC appliance
Twin-block group:wearing Twin-block appliance
Sponsors
Nanjing Stomatological Hospital,Medical School of Nanjing University
Eligibility
Sex/Gender
All
Age
7 Years to 11 Years
Inclusion criteria
Inclusion criteria: (1) patients diagnosed as Class II, division? malocclusion with SNB angle <78 degree; (2) FMA angle <36.3 Degree; (3) ANB angle 5 to 10 degree; (4) retruded mandible with anterior teeth coverlap more than 5 mm; (5) patients with mixed dentition(age between 7 and 11); (6) patients without obvious symptoms of temporomandibular disorders, obvious asymmetric face and orthodontic treatment history; (7) patients Willing to participate in this clinical study and signing informed consent.
Exclusion criteria
Exclusion criteria: (1) family genetic history; (2) patients with maxillofacial deformities due to trauma, tumors and degenerative lesions; (3) Patients with maxillofacial surgery history.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| sagittal position relationship of maxilla and mandible; | — |
Secondary
| Measure | Time frame |
|---|---|
| the growth of maxilla and mandible;the inclinatin of upper and lower anteriior teeth;the relationship of upper and lower first molars;vertical position relationship of maxilla and mandible;mandibular plane angle;changes of facial soft tissue;daily wearing time;comfort of wearing appliance; | — |
Contacts
Public ContactLi Huang
Nanjing Stomatological Hospital, Medical School of Nanjing University
Outcome results
None listed