Skeletal Class III malocclusion
Conditions
Interventions
COS Group:conventinal orthognathic approach
SFA Group:surgery-first approach
Sponsors
Peking University Hospital of Stomatology
Eligibility
Sex/Gender
All
Age
18 Years to No maximum
Inclusion criteria
Inclusion criteria: 1. Aged 18 years and over; 2. Skeletal class III, with or without asymmetry; 3. Upper incisors are so proclined that the upper premolars are need to be extracted; 4. Two-jaw surgery; 5. By model setting up, the case is determined to be able for "surgery-first" approach.
Exclusion criteria
Exclusion criteria: 1. Orthodontia or early loss of tooth, except for the third molars and upper premolars; 2. Moderate-severe periodontitis, with uncontrolled tooth loosing; 3. Cranio-facial syndrome, such as cleft lip/palate; 4. People who fail to cooperate.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| the angle formed by point Sella, Nasion and Supramental (SNB);the angle formed by point Sella, Nasion and Subspinale (SNA);the angle formed by point Subspinale, Nasion and Supramental (ANB);the distance from vertical reference plane to point Supramental (B-VRP);the distance from horizontal reference plane to point Supramental (B-HRP);the ratio of the lower anterior facial height (ANS-Me) to the total anterior facial height (N-ANS+ANS-Me) (%);the ratio of maxillary width to mandibular width ;the distance from Midsagittal Plane to point Me;Upper incisor to S-N plane;Upper incisor to maxillary plane;Lower incisor to mandibular plane;anterior/posterior overjet;overbite;arch width;posterior vertical dimension;the number of occlusal contacts; | — |
Countries
China
Contacts
Public ContactJiang Ruoping
Peking University Hospital of Stomatology
Outcome results
None listed