Compensatory Curves

1) Curve of Spee
o Anteroposterior curve
o Concave
2) Curve of Wilson
o Lateral curve
o From right to left
3) Curve of Monsoon
o A sphere drawn by taking Glabella as the center
o Periphery

Plane of Occlusion
- Ala-tragus line
- Interpupillary line

Cuspal Angulation
- 33° - anatomic cusp
- 20° - semi-anatomic cusp
- 0° - non-anatomic cusp / flat cusp (given in neuromuscular disease cases such as parkinsonism, myasthenia gravis )

Q. Why do we need balanced occlusion?
For stability of occlusion only OK!
STABILITY – Balanced occlusion
SUPPORT – Oral mucosal tissues
Retention – PPS & flanges