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The overbite and intraoral mandibular distraction osteogenesis
K Hero Breuning1, Peter J van Strijen, Birte Prahl-Andersen
1breuning@orthodintics.nl
Summary
Mandibular distraction osteogenesis in Angle Class II malocclusions significantly reduced overbite, but bite opening during the procedure is expected. The
Area of Science:
- Orthodontics
- Craniofacial Surgery
- Dental Research
Background:
- Skeletal Angle Class II malocclusions present challenges in overbite management.
- Intraoral distraction osteogenesis is a surgical technique for mandibular lengthening.
Purpose of the Study:
- To quantify overbite reduction following mandibular distraction in Angle Class II malocclusions.
- To discuss overbite management during and after intraoral distraction and orthodontic treatment.
Main Methods:
- Cephalometric analysis of 26 patients with Angle Class II malocclusion before and after treatment.
- Evaluation of patients undergoing distraction osteogenesis of the mandible.
Main Results:
- Significant reduction in overbite observed post-treatment.
- Significant increase in the SpP/MP angle noted.
- Statistically insignificant changes in Y-axis and MP/SN angles.
Conclusions:
- Bite opening is a predictable outcome during mandibular distraction.
- The 'floating bone' technique did not achieve permanent overbite correction.
- Patients with pre-existing open bites are less suitable for mandibular lengthening via distraction osteogenesis.