Microvascular temporomandibular joint and mandibular ramus reconstruction in hemifacial microsomia.

Microvascular temporomandibular joint (TMJ) and mandibular ramus reconstruction was performed in a 4-year-old hemifacial microsomia patient with multiple craniofacial and extracranial anomalies (Goldenhar syndrome). Her major craniofacial anomalies included bilateral cleft lip and palate, left macrostomia, left microtia, and complete absence of the left vertical mandibular ramus and TMJ. Most of her other anomalies had been corrected surgically before TMJ and vertical mandibular ramus reconstruction, which was accomplished with a metatarsophalangeal (MTP) joint transplantation. The MTP joint was placed in hyperextended position in the skull base inserting the proximal phalanx under the remnants of the zygomatic arch and replacing the vertical mandibular ramus with the metatarsal bone. Straight mouth opening, correction of the midline, and normalized lateral movements of the mandible were accomplished. The graft includes two epiphyseal plates, which should maintain growth of the transplant. During the follow-up period (16 months) the achieved results have been maintained without adverse effects. The present technique appears to be a promising alternative in the treatment of children with Pruzansky type 3 hemifacial microsomia.