Decreased Lower Face Height (LFH)

- The tooth-bearing part of the lower jaw is underdeveloped and overclosed
- The lower face height is too short and this becomes shorter with age
- So the distance from chin to nose is too short and gets shorter with age
- Jaw surgery can correct this
- In most cases lower jaw surgery (BSSO with opening rotation) can resolve the problem
- In some cases both the BSSO and upper jaw surgery (Le Forte I with downgraft or downsliding advancement) are needed