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Jaw Movements & Articulators

Jaw Movements & Articulators. Jaw Movements. Opening. Opening. Opening. Opening. Posselt’s Figure. Posselt’s Investigations. Posselt’s Investigations. Posselt’s Figure. Posselt’s Figure. MP. ICP. RCP. HA. MP = Maximal protrusion ICP = Intercuspal position

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Jaw Movements & Articulators

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  1. Jaw Movements & Articulators

  2. Jaw Movements

  3. Opening

  4. Opening

  5. Opening

  6. Opening

  7. Posselt’s Figure

  8. Posselt’s Investigations

  9. Posselt’s Investigations

  10. Posselt’s Figure

  11. Posselt’s Figure MP ICP RCP HA MP = Maximal protrusion ICP = Intercuspal position RCP= Retruded Contact position HA = Hinge axis MO = Maximum opening MO

  12. Posselt’s Figure – top edge MP ICP IG RCP EE

  13. Articulators

  14. Definitions • Articulators • A mechanical representation of the jaws and temporo-mandibular joints

  15. Use of articulators • Diagnosis • slides and occlusal relationships • Treatment planning • Diagnostic wax - up • Occlusal adjustment • Fabrication of Splint / Prostheses

  16. Articulators • Types • Simple Hinge • Average Value • Semi-adjustable • Fully adjustable

  17. Articulators

  18. Cast Holder

  19. Cast Holder

  20. Average Value

  21. Articulators BONWILL 1854 4” 4”

  22. 4” 4” Articulators • Average Value

  23. Articulators • Average Value

  24. Articulators

  25. Denar II - Arcon

  26. Dentatus • Non Arcon

  27. Denar II • Adjustable Condylar Angle, ISS & PSS

  28. Articulators • Semi-adjustable • Can alter; • TMJ to Incisor distance • Bennett Angle • Condylor Guidance Angle • Incisal guidance plate

  29. Articulators • Needs Facebow recording • Ideally should be used for complete denture cases

  30. Facebow recording For semi adjustable articulator

  31. Fully adustable: Denar 5 • Posterior wall • Superior wall • Medial wall • Inclination of superior wall • Condylar angle • Intercondylar (& glenoid fossa) distance • ISS

  32. Denar 5a

  33. Pantographic recording For fully adjustable articulator

  34. lots Difficulty of use none Av Value Fully Adjustable Hand Held S-A

  35. lots Amount of adjustment none Av Value Fully Adjustable Hand Held S-A

  36. lots Cost none Av Value Fully Adjustable Hand Held S-A

  37. Articulator use vs time vs cost lots lots Amount of adjustment Difficulty of use Cost none none Av Value Fully Adjustable Hand Held S-A

  38. What if patient doesn’t match articulator? Articulator Patient

  39. Articulators

  40. Articulators Therefore the distance from the condyle to the teeth is crucial We obtain a measurement of this distance with a facebow

  41. Facebow

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