Orthodontics · single question
20-year-old with vertical facial asymmetry, chin deviation, and maxillary cant u2014 most probable diagnosis:
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Correct answer: D. Hemifacial hyperplasia
Per Obwegeser: hemifacial hyperplasia involves asymmetric VERTICAL growth at the ramus causing mandibular and maxillary canting. Hemi-mandibular elongation involves asymmetric HORIZONTAL growth causing chin deviation without vertical canting. Osteoarthritis and ankylosis are growth-cessation mechanisms.