Mean Value Articulator

Articulators in Complete Denture

6. Condylar guidance
Incisal guide table
/incisal guidance
Mid-incisal pin
Upper member
Incisal rod
Supporting rod
Lower member
Mounting plate Thumbscrew

7. 30
0

9. •A4-inchequilateral triangle
bounded bylinesconnecting the
contactpointsofthemandibular
centralincisor’sincisaledge(or
themidlineofthemandibular
residualridge)toeachcondyle
(usuallyitsmidpoint)andfrom
onecondyletotheother.
William Gibson Arlington Bonwill, dentist, U.S.A., 1833-1899; first used by Bonwillin 1858

12. Condylar guidance
30
0
30
0
Incisal guidance
15
0
15
0
Intercondylar distance
4” (110 mm)
110 mm

13. Based on theories of occlusion
Bonwill’s
Theory
Conical
Theory
(Hall)
Spherical
Theory
(Monsoon)

14. Based on adjustability
Non-
adjustable
Semi-
adjustable
Fully-
adjustable
RihaniA (1980) | Gillis, Boucher and Kingery

15. Based on Ar-Con Principle
Non-Arcon Arcon
Bergstrom

16. Sharry’sClassification
Class I
Simple
Class II
Hinge type
Class III
Fixed Guide
type
Class IV
Adjustable

17. Based on instrument function
Class I
a simple holding instrument capable of accepting a single static registration; vertical motion is
possible; syn, NONADJUSTABLE ARTICULATOR
Class II
an instrument that permits horizontal as well as vertical motion but does not orient the motion to
the temporomandibular joints
Class III
an instrument that simulates condylar pathways by using averages or mechanical equivalents for all
or part of the motion; these instruments allow for orientation of the casts relative to the joints and
may be arconor nonarconinstruments; syn, SEMIADJUSTABLE ARTICULATOR
Class IV
an instrument that will accept 3D dynamic registrations; these instruments allow for orientation of
the casts to the temporomandibular joints and simulation of mandibular movements; syn, FULLY
ADJUSTABLE ARTICULATOR,
International Prosthodontic Workshop, University of Michigan (1972); GPT -9

19. Incisive papilla
Canine papilla
canine (CPC) line
Crest of
residual
alveolar ridge
Midline
Maxillary cast

20. Retromolar pad
(in thirds)
Crest of
residual
alveolar ridge
Mandibular cast

21. Follow the arch
form
Anterior
proclination
45
0
cut at the
tuberosity
6 mm
8 mm
18 mm 22 mm
Maxillary occlusal rim

22. Mandibular occlusal rim
6 mm
8 mm
18 mm
2/3 of
retromolar pad
Follow the arch
form
No anterior
proclination
Ensure flat occlusal
surface

23. Mark the notches with a scale and pencil
15 mm
5 mm
5 mm

24. Cut the notches with a sharp Stanley knife
Final indexing Ensure sharp edgesHold the knife at 45
0

25. Seal the occlusal wax rims
Orient them to the articulator using modelling clay
Mount the maxillary cast
Mount the mandibular cast
Verify