Abstract
This patient was diagnosed as having sleep apnea syndrome with micrognathia caused by mandibular ankylosis. At the age of 22 years and 3 months, 18mm of mandibular body lengthening was performed, by distraction osteogenesis, during a period of 20 days. Four months after the distraction, the devices were replaced with titanium miniplates.
Ultrasonic evaluation was conducted every week, to estimate the bone formation. Distance and area measurement were performed with lateral cephalograms taken before and after the distraction, to analyze the augmented volume of bone. In addition, polysomnography and a pulse-oximeter were used to monitor physiological functions.
As a result, the mandible was distracted forward, and significant improvements of the apnea and the profile could be seen.
