A 25-year-old woman presented with left condylar hyperplasia, canting-type facial asymmetry, mandibular prognathism, and arch width discrepancy. Bone scintigraphy confirmed the inactive status of the condyle, and the temporomandibular joint functioned within the normal range; thus, orthognathic surgery without condylectomy was performed. To correct facial asymmetry successfully through orthognathic surgery, sufficient dentoalveolar decompensation must be achieved in the presurgical orthodontic phase. In cases of canting-type facial asymmetry, teeth on the nondeviated side are extruded as dentoalveolar compensation. Therefore, vertical decompensation is required for intrusion of the extruded teeth. A miniscrew and resin build-ups were used for the intrusion of teeth, and posterior segmental osteotomy was simultaneously performed with orthognathic surgery for further intrusion. The canting-type facial asymmetry was notably corrected through successful vertical decompensation and close cooperation between orthodontists and maxillofacial surgeons. After 2 years of retention, the treatment results remained stable.

CBCT, Unilateral condylar hyperplasia, Posterior segmental osteotomy
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Author notes

a 

Professor, Department of Orthodontics, Dental Research Institute, and Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan, South Korea.

b 

Private Practice, Seoul, South Korea.

c 

Assistant Professor, Department of Orthodontics, Dental Research Institute, and Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan, South Korea.

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2022