Hemimandibular Hyperplasia

Abstract

True hemimandibular hyperplasia is an uncommon maxillofacial deformity. Patients with this affliction present clinically with varying degrees of asymmetry characterized by an increase in ramus height, a rotated facial appearance with kinking at the mandibular symphysis, and prominence of the lower border of the mandible. In the advanced form, maxillary and mandibular alveolar bone overgrowth result in a compensatory canting of the occlusal plane and a significant functional malocclusion requiring bimaxillary surgical correction. Nine patients with the above condition were treated with various surgical methods over a 9-year period. The clinical results were satisfying and the long-term results showed good postoperative stability. The pathology of hemimandibular hyperplasia is described and the preexisting nomenclature further defined.

Definitive surgical correction of the deformity resulting from hemimandibular hyperplasia

“…A number of authors have described or discussed the condition from the point of view of morphological analysis, including Rushton (1951), Mutoh et al (1991), Pelotti et al (1994), Silveira and Scarfe (1995), and Khorsandian et al (2001). Various treatment strategies have been proposed and described by Blair and Schneider (1977), Fox (1977), Komorowska and Kawiak (1988), Koumoura and Kountouris (1988), James (1990), Jensen (1994), Chen et al (1996), Marchetti et al (2000), Li et al (2001), Obwegeser (2001), Bertolini et al (2001, and Sugawara et al (2002). These techniques range from relatively simple, such as condylectomy, to complex procedures including bimaxillary surgery associated with complex mandibular osteotomies.…”

Consecutive condylectomy and molar intrusion using temporary anchorage devices as an alternative for correcting facial asymmetry with condylar hyperplasia

“…10,16 Even if the condyle is inactive, treatment may also involve condylectomy or condyloplasty when the hyperplastic condyle is grossly enlarged and normal remodeling changes cannot be predicted. 17,18 In our patient, bone scintigraphy demonstrated active bone growth on the right condyle, indicating the necessity for the condylectomy.…”

Two-Stage Treatment of Facial Asymmetry Caused by Unilateral Condylar Hyperplasia

“…If there is evidence of abnormal condylar growth, condylar surgery should be undertaken before a severe facial deformity develops (14). The removal of the condyle is expected to arrest the excessive, disproportionate growth of the mandible in the diseased region and eliminate the need for additional surgical interventions in most cases.…”