2- Balanced occlusion

3. Dr. Amal Fathy Kaddah
Prof. of Prosthodontic,
Faculty of Oral & Dental Medicine,
Cairo University

4. • The stomatognathic system
• What 'occlusion' is and why it is important
• Definitions.
• The significance of 'ideal occlusion‘
• Difference between natural and artificial Occ.
• Mandibular Movements.
• Articulators and Facebows.
• Balanced Occlusion and Factors affecting Balanced O.
• Concepts of occlusion (Balanced and Non balanced Occlusion).
• Recording of Occlusion for removable prosthodontics.
• Occlusal correction for Removable Prosthesis.
• Occlusion and implant restorations (Loading protocols)
Occlusion Outline

7. Balanced
Occlusion/Articulation
•The Bilateral simultaneous
contact of the anterior and
posterior teeth in excursive
movements. (GPT 9)

8. •There should be no interferences
during movement from centric
position to eccentric positions.
•The movements should be in
harmony with TMJ &
neuromuscular control

10. 1- Provide maximum denture stability during functional
and parafunctional movements of the mandible
2- Help in distribution of the masticatory pressure
over the supporting tissues and reduce trauma to the
underlying tissues
3- Increased efficiency of mastication
4- Psychologically it is more comfortable to the
patients who enjoy comfort and satisfaction only
when eccentric balance is present

11. Balanced Occlusion is important to:
Prevent the denture movement during
chewing, produce efficient mastication
and in turn help in stabilizing the denture

12. Types of Balance as Related
to Complete Denture
1) Lever balance
2) Occlusal balance

13. 1- Lever balance
Dependent on
tooth position as
related to its base

14. Greater the lever balance by
favorable tooth denture
relationship Greater
the stability of the base
during mastication until the
teeth contact.

16. Lever balance and the greater
the stability of the base.
1. The larger ridge.
2. The closer the teeth to ridge.
3. The more lingualized occlusion.
4. The more centered the force of
occlusion antero- posteriorly

17. The better the Lever
balance the greater
the stability of the
denture base during
mastication until
teeth contact.
1- Favorable tooth- to -ridge crest position
Inter bolus exit balance is
compensated by lever balance

18. Equilibrium of the base on its supporting
structures when a bolus of food is interposed
between the teeth on one side and a space
exist between the teeth on the opposite side

19. a- The height of occlusal plane should be
1-2 mm. below the lip line.
Aesthetic base.
Leverage action
Functional base
2- Determination of the height
of the occlusal plane

20. b- The occlusal surface of the teeth should be
below the greatest convexity of the tongue.
This also improves the stability of lower denture.

21. convenient and at
a level familiar to
the tongue to
perform its action
easily and stop
food escaping to
the floor of the
mouth.
The height of occlusal plane should be

22. The tongue brings the food onto the occlusal
plane, then it holds the food between the upper
and lower teeth by cooperating with the
buccinator muscle so that the food can easily
crushed. The food is held between the bucc.
(its middle fibres) and the tongue, and crushed.
Chewing

23. C- Leverage action: The nearer the
occlusal plane to the basal bone of
the jaws, the less the leverage
action and the better the stability.

24. Unilateral lever balance
Equilibrium of the base on its
supporting structures when a
bolus of food is interposed
between the teeth on one side
and a space exist between the
teeth on the opposite side

25. 1. Placing the teeth over the ridge.
2. Denture base area covers as
wide area on the ridge as
possible.
3. Placing the teeth as close to the
ridge as other factors will permit.
4. Using as narrow a buccolingual
width occlusal food table.
To achieve the unilateral lever balance

26. 2- Occlusal balance
Is dependent on
tooth contact

27. 2- Occlusal balance
1) Unilateral occlusal balance
(Group function) This is not followed for balanced
occlusion of complete denture It is more pertained
to fixed partial dentures
2) Bilateral occlusal balance
3) Protrusive occlusal balance
4) Mutually protected occlusion
(Canine protected) This is not followed for
complete denture

28. The group function concept
.
It requires teeth on the
working side to be in
contact in lateral
excursion simultaneously
with a smooth,
uninterrupted glide
and teeth on the non-
working side are free of
any contact.
1- Unilateral occlusal balance
This is not followed during
complete denture
construction. It is more
pertained to fixed partial d.

29. Group Function

30. Bilateral simultaneous occlusal contact
of teeth, anteriorly and posteriorly, in
both centric and eccentric positions.
Gliding of the teeth across each other
during their movement from one position
to another, without any interferences.
2- Bilateral occlusal balance

31. Bilateral balance in artificial teeth, is
necessary to stabilize the bases.
Centric occlusion
Balanced
eccentric
occlusion

32. 3- Protrusive occlusal balance
• This type of balanced occlusion is present
when mandible moves in a forward direction
and the occlusal contacts are smooth and
simultaneous anteriorly and posteriorly.

33. 3- Protrusive occlusal balance
 There should be at least 3
points of contact on the
occlusal plane Two located
posteriorly and one anteriorly.
 The more the number of
contacts the better will be
the balance.
 Absent in natural dentition.

34. Unbalanced
occlusion

36. The objective of occlusal
balance is to create bilateral
contacts from the centric
position to all eccentric position,
that are free from interference,
smooth, uniform and in harmony
with movement of the mandible

37. Excursive Movements
Laterotrusive and Mediotrusive
Non-working
Side
(Mediotrusive)
Working Side
(Laterotrusive)
LEFT MANDIBULAR EXCURSION
Centric
occlusion

38. Excursive Movements
Centric
occlusion
Protrusive
The mandible moves essentially forward and the
occlusal contacts are smooth and simultaneous in the
posterior both on right and left sides and on the
anterior teeth.

39. 4- Mutually Protected Occlusion
• Also called canine protected occlusion
• Anterior teeth overlap prevents the posterior teeth
from making any contact on either the working or
the nonworking sides during mandibular
excursions.
• Anterior teeth bear all the load and the posterior
teeth are dis-occluded during excursions. Protecting
the posterior teeth
• In CO, posterior teeth direct forces through their
long axis and anterior teeth are slightly in or out of
contact. Protecting the anterior teeth.

40. When the patient moves to the side during chewing,
there are only one or two tooth contacts, and then the
denture bases will tip up and be very difficult to control.
If they do not tip because the ridges and/or the patient’s
muscle control prevent this, they will create pain,
discomfort, and ulceration.

41. ‫تجبه‬ ‫فال‬ ‫السفيه‬ ‫نطق‬ ‫إذا‬
...
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...
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42. Factors Affecting
Balanced
Occlusion
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