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Angles and Surgery Guide
Angles covered in this guide:
- Mandibular plane angle
- Orbital maxillary plane angle
- Temporal plane angle
1. Mandibular Plane Angle
1. Bilateral Sagittal Split Osteotomy (BSSO)
- Directly alters mandibular inclination.
- Advancing the mandible counterclockwise corrects weak chins, improves airway dimensions, and optimizes lower facial height.
2. CCW Rotation
- Provides similar structural and aesthetic results to BSSO by rotating the jaw complex.
3. Maxillomandibular Advancement (MMA)
- Advances both upper and lower jaws simultaneously.
- Best for fixing this angle; maximizes stability and airway volume for severe OSA.
2. Orbital Maxillary Plane Angle
1. Le Fort III
- Best for this angle, but typically only indicated for patients under 9 years old with severe congenital deformity.
- Addresses severe nasomaxillary hypoplasia or protrusion without altering cheekbones.
2. Narrow Le Fort II
- Main alternative to fix this angle.
- Yields similar or slightly less dramatic results compared to Le Fort III.
3. Temporal Plane Angle
1. Middle Cranial Fossa Approach
- Surgical approach, though widely considered unfixable via standard elective means.
2. Hairstyling / Cover-up
- Grow
ing hair over the area to obscure the frame.

