Two Cases of Distraction Osteogenesis in Lengthening Hypoplastic Mandible of Hemifacial Microsomia

Evaluation 3 Years after Distraction

Abstract

Mandibular lengthening by distraction osteogenesis was performed on two females (6 and 9 years old) with hemifacial microsomia to correct facial asymmetry. The follow up was done by cephalometric analysis for 3 years.
The results were as follows:
1) Three years after distraction, the morphological symmetry corrected by distraction had almost been maintained.
2) However, a slight amount of deviation on affected side was noticed at the Menton.
3) In lateral chepharogram, ∠SN-Pog did not changed for 3 years after distraction.
4) Downward growth of the maxilla on the affected side was not observed. Open bite at lengthened side seemed to be closed by eruption of the permanent molars.