Angle Class II high-angle malocclusion
Conditions
Interventions
Experimental group:Treatment with an invisible high-pull headgear activator appliance
Control group:Treatment with a conventional headgear activator appliance
Sponsors
Hospital of Stomatology, Southern Medical University
Eligibility
Sex/Gender
All
Age
8 Years to 12 Years
Inclusion criteria
Inclusion criteria: 1. Voluntarily cooperate with this research and sign the informed consent form. 2. The molars or incisors have an Anzenbacher type II relationship; the sagittal relationship of the maxilla and mandible is abnormal, manifested as an ANB angle > 4°; patients with high-angle type: the mandibular plane angle (MP-SN) >= 37°, FMA >= 28°, accompanied by an imbalance in the anterior-posterior height ratio. 3. No gender restrictions; age 8-12 years old, in the late stage of deciduous teeth replacement or early permanent teeth stage. 4. Overall health, without systemic diseases that affect the growth and development of the maxillofacial region. 5. Have good compliance, able to attend follow-up visits on time and complete imaging examinations.
Exclusion criteria
Exclusion criteria: 1. Those who have previously received orthodontic or jaw orthodontic treatment; 2. Those with severe facial deformities (such as cleft lip and palate, asymmetrical jawbone development, etc.); 3. Those with severe periodontal disease, dental caries or missing permanent teeth that affect the treatment outcome; 4. Those with obvious symptoms of temporomandibular joint dysfunction; 5. Pregnant or lactating women; 6. Those who participated in other clinical trials or received treatments conflicting with the intervention of this study within 6 months before the start of the research; 7. Other situations that the researcher deems unsuitable for participation in this study.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| ANB angle; | — |
Secondary
| Measure | Time frame |
|---|---|
| Mandibular plane angle;Lower incisor inclination;Anterior-to-posterior facial height ratio;Wearing time;Completion rate; | — |
Countries
China
Contacts
Public ContactXiong Hongzhen
Hospital of Stomatology, Southern Medical University
Outcome results
None listed