1. Articulators Dr Balendra pratap singh
BDS, MDS, MAMS, FISDR, FPFA, FAAMP, ICMR-IF
Assistant Professor
Department of Prosthodontics
King George’s Medical University, Lucknow

2. Jaw Movements

7. Posselt’s Figure

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

9. Posselt’s Figure – top edgeMP
ICP IG
RCP EE

10. Articulators

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

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

13. Articulators Types Simple Hinge Average Value Semi-adjustable
Fully adjustable

14. Articulators

15. Cast Holder

16. Cast Holder

17. Average Value

18. Articulators
BONWILL 1854 4” 4”

19. Articulators
Average Value 4”

20. Articulators
Average Value

21. Articulators

22. Denar II - Arcon

23. Dentatus
Non Arcon

24. Denar II
Adjustable Condylar Angle, ISS & PSS

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

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

27. Facebow recording
For semi adjustable articulator

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

29. What if patient doesn’t match articulator?

30. Articulators

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

32. Facebow

36. Aids to obtaining THA
Bimanual manipulation Cotton wool rolls Anterior “jig” Splint therapy Chin-point guidance

37. Anterior jig
Cold-cure acrylic (Duralay/Trim) Greenstick

38. Anterior Jig
From Howatt, Capp & Barrett

39. Clinically useful settings for articulator
Condylar angle at saggittal plan30 and lateral guidance 15 ° Immediate side shift 0.3mm Progressive side shift 6°

40. Incisal guidance table
Allows shape of palatal to be reproduced Allows length of incisors to be maintained

44. Tooth to be prepped
Shape created is
the inverse of Posselt’s figure

45. Following tooth prep

46. Tooth form reconstructed

47. Summary The choice of articulator depends upon such factors as;
Intended use - Skill of the technician
Availability of equipment - Expense
Patient's occlusion - Skill of the operator
The more closely the articulator matches the patients anatomy, usually the better the outcome and the less adjustment is required at chairside on fitting prostheses.

48. Key note messages
No articulator is best and no one can record all jaw movements
Articulator can try to record only jaw movements not reproduced anatomy of joint.

49. Thank You