Treatment of mandibular asymmetry by unilateral bidirectional distraction osteogenesis


Novruzov Z., Ozdiler E., Sayan N., Karasu H., Ozel M.

Azerbaijan Medical Journal, no.3, pp.132-135, 2007 (Scopus) identifier

  • Publication Type: Article / Article
  • Publication Date: 2007
  • Journal Name: Azerbaijan Medical Journal
  • Journal Indexes: Scopus
  • Page Numbers: pp.132-135
  • Keywords: Distraction osteogenezis, Mandibular asymmetry
  • Ankara University Affiliated: Yes

Abstract

This case report describes the surgical-orthodontic treatment procedures of a patient with condylar hypoplasia. Condylar hypoplasia is a major factor in any facial abnormality and asymmetry in a growing child. The patient had a hemifacial microsomia. Her asymmetry was corrected by using extraoral distraction osteogenesis for lengthening the mandibular ramus and corpus height. The patient was underwent extraoral unilateral and bidirectional mandibular distraction osteogenesis. The latency period after the operation was five days. The distraction was performed three times daily for 12 days at the rate of 0.33 mm each time. The patient's mandible was elongated successfully. After achieving the desired skeletal position, the distraction devices were maintained for three months to allow ossification. After a three-months period to allow consolidation of the mandibular distraction osteogenesis, secondary maxillary surgery at the LeFort 1 level was performed to reestablish maxillary occlusal contact at the new mandibular occlusal plane. A genioplasty was also performed to improve chin projection. Fixed orthodontic appliances were used for conventional orthodontic therapy and final occlusal adjustment. Patient achieved lengthening of their jaws and substantial improvement in facial symmetry and occlusion. Distraction osteogenesis is an alternative treatment method for the correction of mandibular hypoplasia and asymmetry.