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Dentoskeletal effects and facial profile changes during activator therapy
Paola Cozza1, Laura De Toffol, Stefania Colagrossi
1Department of Orthodontics, School of Dentistry, University of Rome 'Tor Vergata', Italy.
European Journal of Orthodontics
|June 30, 2004
Summary
Activator treatment effectively corrected Class II malocclusions in growing patients with mandibular retrognathism. This orthodontic approach improved skeletal, dental, and soft tissue profiles through a combination of changes.
Area of Science:
- Orthodontics
- Craniofacial Development
- Dentofacial Orthopedics
Background:
- Class II malocclusions due to mandibular retrognathism are common in growing patients.
- Orthodontic treatment aims to correct skeletal and dental discrepancies for improved function and aesthetics.
- Activator appliances are used to modify jaw growth and dental relationships.
Purpose of the Study:
- To cephalometrically evaluate skeletal, dental, and soft tissue changes from activator treatment in mixed-dentition patients with Class II malocclusions.
- To compare outcomes between patients treated with an incisor double capping activator and a control group.
Main Methods:
- Retrospective cephalometric analysis of lateral radiographs from 40 treated patients and 30 controls (mixed dentition).
- Measurements taken before treatment (T0) and after 18-24 months (T1) post-activator removal.
- Comparison of dentoskeletal and soft tissue parameters between the activator group and the control group.
Main Results:
- Activator treatment corrected the Class II relationship (ANB -2.14°).
- Maxillary growth was restricted (SNA -0.5°), and mandibular structures advanced (SNB +1.64°, FH-NPg +3.39°).
- Overjet (-5.03 mm), overbite (-1.17 mm), and maxillary incisor inclination (1-FH -5.64°) improved, enhancing the facial profile.
Conclusions:
- Activator therapy is effective for growing patients with mandibular deficiency.
- The appliance corrects Class II malocclusions via combined skeletal and dental modifications.
- Treatment improves the soft tissue facial profile in patients with mandibular retrognathism.
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