J Korean Assoc Maxillofac Plast Reconstr Surg.  2010 Sep;32(5):447-453.

Simultaneous Maxillo-Mandibular Distraction Osteogenesis in Hemifacial Microsomia: a Case Report

Affiliations
  • 1Department of Oral and Maxillofacial Surgery, Department of Dentistry, College of Medicine, In-Ha University, Incheon, Korea. kik@inha.ac.kr

Abstract

The hemifacial microsomia is characterized by variable underdevelopment of the craniofacial skeleton, external ear, and facial soft tissues. So, patients with hemifacial microsomia have an occlusal plane canting and malocclusion with facial asymmetry. Distraction osteogenesis (DO) with an intraoral or extraoral device is a technique using tension to generate new bone with gradual bone movement and remodeling. DO has especially been used to correct craniofacial deformities such as a hemifacial microsomia, facial asymmetry, and mandible defect that could not adequately be treated by conventional reconstruction with osteotomies. It has a significant advantage to lengthen soft and hard tissue of underdeveloped site without bone graft and a few complication such as nerve injury or muscle contracture. A 13-years old girl visited our clinic for the chief complaint of facial asymmetry. She had a left hypoplastic maxilla and mandible, occlusal plane canting and malocclusion. We diagnosed hemifacial microsomia and planned DO to lengthen the affected side. Le Fort I osteotomy, left mandibular ramus and symphysis osteotomy were performed. The internal distraction devices fixed with screw on maxillary and mandibular ramus osteotomy sites. External devices were adapted to lower jaw for DO on symphysis osteotomy site and to upper jaw for rapid maxillary expansion (RME). At 7days after surgery, distraction was started at the rate of 1mm per day for 13days, and after 4months consolidation periods, distraction devices were removed. Simultaneous multiple maxillo-mandibular distraction osteogenesis with RME resulted in a satisfactory success in correcting facial asymmetry as well as occlusal plane canting for our hemifacial microsomia.

Keyword

Hemifacial microsomia; Distraction osteogenesis; Maxilla and mandible; Osteotomy

MeSH Terms

Congenital Abnormalities
Contracture
Dental Occlusion
Ear, External
Facial Asymmetry
Humans
Imidazoles
Jaw
Malocclusion
Mandible
Maxilla
Muscles
Nitro Compounds
Osteogenesis, Distraction
Osteotomy
Palatal Expansion Technique
Skeleton
Transplants
Imidazoles
Nitro Compounds
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