Adolescent mandibular retrusion with temporomandibular joint disc displacement without reduction
Conditions
Interventions
Experimental Group:A new invisible functional appliance
Control group: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 disc displacement without 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 |
|---|---|
| Condylar height;Co-Po (node-POG distance); | — |
Secondary
| Measure | Time frame |
|---|---|
| ANB (upper alveolar points-nasal root points-inferior alveolar point Angle);Wits value;Overbite;Overjet;Pog’-0-meridian;Molar relation;Asymmetry indexofocclusalforce;Occlusal time; | — |
Countries
China
Contacts
Public ContactZhigui Ma
Shanghai Ninth Peoples's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine
Outcome results
None listed