Skeletal Class III Malocclusion
Conditions
Interventions
Dental-anchored protraction therapy:A traditional Hyrax rapid maxillary expansion and protraction appliance was bonded to the right maxillary first premolar (UR6) and left maxillary first premolar (UL
Skeletal-anchored protraction therapy:A skeletal maxillary expansion and protraction device was bonded to the maxillary right first premolar (UR6) and the maxillary left first premolar (UL6). The inst
Sponsors
Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Nanjing University
Eligibility
Sex/Gender
All
Age
7 Years to 15 Years
Inclusion criteria
Inclusion criteria: 1. Age: Female: 7 years 180°, 22° < FMA < 30°, CVM stage II–IV. 4. No prior orthodontic treatment. 5. Informed consent signed by guardian.
Exclusion criteria
Exclusion criteria: 1. Genetic Syndromes: Achondroplasia, Down Syndrome, Cleidocranial Dysplasia, etc. 2. Congenital Disorders Affecting Craniofacial Development: Cleft Lip and Palate, Congenital Syphilis, Macroglossia, etc. 3. Congenital or Acquired Missing Teeth (Missing three or more teeth). 4. Impacted Anterior Teeth (Two or more impacted teeth). 5. History of Maxillofacial Trauma or Severe Infection. 6. Previous Orthodontic Treatment History. 7. Class I or Class II Malocclusion. 8. Systemic or Environmental Factors: Hormonal Imbalances or Disorders, Gigantism or Pituitary Adenoma; Systemic Diseases such as Rheumatoid Arthritis, Diabetes, Osteoporosis; Positive for Hepatitis B, HIV, or Syphilis. 9. Patients Unable to Cooperate with Treatment and Follow-Up.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| A-Np (A to Nasion Perpendicular); | — |
Secondary
| Measure | Time frame |
|---|---|
| Craniofacial Skeletal Indicators;Dental Indicators;Compliance Rate and Adherence to Facemask Wear in Patients; | — |
Countries
China
Contacts
Public ContactLi Huang
Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Nanjing University
Outcome results
None listed