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By: Sh.Barat MD.
 Anthropometric proportions of the chin have been
 measured in “healthy young North American white
 adults” by Leslie Farkas’ team in Toronto [8]. In their
 study, they found an average distance from the LM fold
 to pogonion of 16.9±3.6mmfor men and 17.3±2.3mm
 for women. The average distance from the pogonion to
 gnathion was 20.4±3.7mm for men and 17.6±2.2mm
 for women. Absolute values are less important to facial
 aesthetics than a well-proportioned chin.
 Microgenia is the most common chin deformity, with
 the vast majority in the horizontal plane
 Procedures
 available include: sliding osseous genioplasty, reduction
 wedge genioplasty, reduction mentoplasty, alloplastic
 augmentation, orthognathic surgery, submental
 platysma plication, cervicofacial rhytidectomy, deoxycholic
acid (Kybella R ) injections into submental
 fat, and skin resurfacing
Systematic Evaluation
 Various conditions such as hemimandibular
 hyperplasia or juvenile rheumatoid arthritis may be
 progressive, with early intervention resulting in
Bone scintigraphy can identify condylar
hyperplasia when active changes are occurring. Serial
cephalometric and photographic analysis over a period
of six months to a year indicates likely succession of
growth when no further changes are seen.
 Men typically
 finish mandibular growth in their late teens to early
 twenties, with women ending growth two to three
after menarche. In cases of class II skeletal deformities,
concern is lessened for surgical relapse as the
of growth is in the same direction as the movement
planned. The opposite is true for class III deformities.