1. Muscles of Mastication
Anatomical Features
Jaw Movements
Articulators

2. Lateral Pterygoid

3. Medial Pterygoid Origin = Medial surface of lateral Pterygoid plate
Insertion =
medial wall of ramus and angle of mandible
Nerve supply =
Vmand – nerve to medial pterygoid
Action =
Elevation (+protrusion + medial)

4. Lateral Pterygoid Origin =
Lateral surface of lateral pterygoid plat (+greater wing of sphenoid)
Insertion =
Neck of condyl and articular disc of TMJ
Nerve supply =
Vmand – Antr divn
Nerve to lat ptery
Action =
Protrusion and opening

5. Lateral view of Mandible
Coronoid process
Condyle
Ramus
Body

6. Overview
Glenoid Fossa
Skull
Zygomatic arch
Temporal bone
Mandible

7. Digastric
Posterior belly
Anterior belly
Hyoid bone

8. Temporalis Origin = temporal surface of skull and temporal fascia
Insertion =
Coronoid process and antr border of ramus
Nerve supply =
Vmand – Antr divn
Temporal nerve
Action =
Elevation (+retraction)

9. Masseter Origin = Zygomatic arch Insertion =
Lateral wall of ramus and angle of mandible
Nerve supply =
Vmand – Antr divn
Masseteric nerve
Action =
Clenching (+protrusion)

10. Base of Skull Lateral pterygoid plate Zygomatic arch
Articular eminence
Glenoid fossa

11. Interarticular disc

12. Masticatory muscle insertions2 4 1 3
1 = Temporalis
2 = Masseter
3 = Lateral pterygoid
4 = Medial pterygoid

13. Condylar angle

14. Hinge
Axis
Rotation

15. Translation

16. Incisal Guidance

17. Condylar Guidance

18. Lateral Movements

20. Simple Hinge

21. Average Value

22. Denar II - Arcon

23. Fully Adjustable

24. Fully Adjustable

25. Denar II
Adjustable
Condylar Angle
ISS & PSS