" The chin plays a decisive role in the contour of the lower face. And harmonious jaw will correspond to good facial profile and positive image. Osseous genioplasty is a widely used method to correct the 3-dimensional(sagittal, vertical, transverse) deformity of the chin with minimal complications.
 During an 8 year period from 1988, the authors at the In-Je University Seoul Paik Hospital experienced 198 patients of osseous genioplasty. Results of clinical analysis are as follows: 
1) Male to female ratio was 1: 3 with female being predoniment. The average age was 24.9 years.
2) Horizontal advancement genioplasty in 169 cases was the most common procedure with 7.0mm of average advancement. There was 4 cases of horizontal retrusion with average retrusion of 4.3mm. 52 cases had vertical augmentation with average of 7.5mm increase. 9 cases had vertical reduction with average redution of 4.9mm.
3) Although malocclusion is not necessarilly contraindication to genioplasty alone, genioplasty following surgical with or without orthodontical correction of malocclusion is the way to get better result with patient satisfaction.
4) 77% of the patients had adjunctive procedures simultaneously to acheive a better contour and profile. 
5) Complications such as hematoma, infection, fractrue, nerve damage were minimal. 
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