Dento-alveolar deficiency
- This is when the tooth bearing part of the lower jaw is retrusive but the chin is prominent
- In these patients the lower face height is usually decreased (this nose to chin height decreases further with age)
- Correcting this involves a BSSO to advance the lower dentition with opening rotation into a correct bite
- At the same operation a reduction genioplasty is necessary to shift the chin back so that it is not too prominent
- This combination of surgical procedures obtains the correct lower lip fullness and the correct lip-chin-throat angle