Orthognathic surgery

Question 1

What does pre-surgical orthodontics do?

Answer 1

→ Tooth alignment, eliminating crowding, spaces and crossbite
→ Alteration and co-ordination of the arches
→ Correction of incisors’ inclination (de-compensation)
→ Flattening occlusal plane

Question 2

2 types of maxillary procedure

Answer 2

Le fort 1 osteotomy (superior, inferior, forward)

Anterior maxillary osteotomy (posterior)

Question 3

Mandibular procedures

Answer 3

Advancement

• sagittal split osteotomy (cut mandible from inside)
• Inverted L ramus osteotomy

Set-back

• sagittal split osteotomy
• VSSO (vertical subsigmoid osteotomy)