Mandibular retrusion with temporomandibular joint disc displacement in adolescents
Conditions
Interventions
Group 1:A new invisible functional appliance
Group 2:Traditional forward repositioning jaw pad
Sponsors
Shanghai Ninth People's Hospitial
Eligibility
Sex/Gender
All
Age
12 Years to 20 Years
Inclusion criteria
Inclusion criteria: 1. The subjects were 12-20 years old (inclusive) and of both sexes 2. a history of joint symptoms (including clicking, pain, limited mouth opening, etc.); 3. Clinical examination of the appearance of mandibular retrusion 4. Angle Class II malocclusion with ANB > 4° 5. TMJ MRI showed anterior displacement of TMJ disc with reduction 6. no history of orthodontic treatment 7. Those who did not participate in other clinical verification within 3 months 8. no acute infectious diseases, psychiatric disorders, or systemic diseases 9. The informed consent was signed by the guardian or the person
Exclusion criteria
Exclusion criteria: 1. History of functional appliance treatment 2. orthodontic and/or orthognathic treatment history 3. contraindications to MRI examination 4. Primary dentition 5. patients with mental illness 6. patients who are unable to cooperate with treatment 7. congenital or developmental diseases, systemic diseases, infections, jaw fractures and other diseases causing disc displacement or condylar resorption;
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Success rate of conservative treatment of disc reduction; | — |
Secondary
| Measure | Time frame |
|---|---|
| Pog’-0-meridian;ANB;Wits;Co-Po;overbite;Molar relation;overjet;occlusion time; | — |
Countries
China
Contacts
Public ContactZhigui Ma
Department of Oral Surgery, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine
Outcome results
None listed