Mouth protrusion & ASO
ASO surgery for mouth protrusion (돌출입)
ASO (anterior segmental osteotomy) removes premolars and moves the tooth-bearing bone segment inwards before fixing it — suited to protrusion caused by the alveolar bone rather than tooth inclination alone.
Who it suits
- Protrusion arising from the alveolar bone, not just tipped teeth
- Patients for whom extraction orthodontics is not enough
Technique highlights
- A narrower operative field and shorter recovery than double jaw surgery
- EU compares three routes for patients: extraction orthodontics, ASO, and double jaw surgery
Surgical steps
- Determining whether protrusion is dental, alveolar or skeletal
- Premolar extraction to create the space
- Osteotomy, retraction of the segment and fixation
Recovery & aftercare
- Oral care and liquid diet similar to jaw surgery, over a shorter period
Risks & things to consider
- Protrusion combined with facial asymmetry usually needs more than ASO
Frequently asked questions
When is double jaw surgery preferred over ASO?
EU explains that when protrusion accompanies a skeletal problem — asymmetry, a receding chin or a long face — double jaw surgery addresses more than ASO can.
Recommended clips
Real patient reviews
ASO (anterior segmental osteotomy) · Front view
ASO (anterior segmental osteotomy) · 45° view
ASO (anterior segmental osteotomy) · Side view
Mini V-line + ASO (anterior segmental osteotomy) · Front view
Mini V-line + ASO (anterior segmental osteotomy) · 45° view
Mini V-line + ASO (anterior segmental osteotomy) · Side view
Source: eudental.co.kr