BALANCED OCCLUSION

2. OCCLUSAL SCHEMES

3. OCCLUSAL SCHEMES
• It is the tooth form and
arrangement.
• Tooth forms are:
• A- Anatomic (Cusp
angle from 30 to 35
degrees).
• B- Semi-anatomic (Cusp
angle 20).
• C- Non anatomic, flat or
cuspless.

4. CONCEPTS OF OCCLUSION FOR
COMPLETE DENTURES
• 1- Bilateral balanced occlusion.
• 2- Monoplane occlusion/
• 3- Lingualized occlusion

5. 1- Bilateral balanced
occlusion

6. 1- Bilateral balanced occlusion
(Balanced articulation)
• The bilateral, simultaneous, anterior &
posterior occlusion contact of teeth in
centric & eccentric position.
• It is maximum contact between the
maxillary and mandibular teeth in
centric and eccentric positions

7. Importance of balanced articulation
• 1- Balanced occlusion is important for
complete denture retention during
mastication.
• 2- Balance is most important for denture
stability during the countless excursive
movements that occur between meals.
• 3. Reduced Trauma to supporting tissues.
• 4. Efficiency
• 5. Time Saving.

8. Centric occlusion

9. Left lateral

10. Right lateral

11. Protrusion

12. Factors affecting balanced
articulation

13. A- The horizontal condylar guidance (HCG)
• The horizontal condylar
guidance (HCG) is an
indication of the
downward and forward
slope the condyles
follow in a protrusive
movement.
• It is recorded from
patient and transferred
to articulator.

14. B- Incisal Guidance
• The incisal path is the
path of lower incisal edge
on palatal surface of
upper anterior teeth.
• Incisal guide angle is the
angle formed between the
horizontal and the incisal
path.
• Incisal guide is that part
of an articulator which
maintains the incisal
guide angle.

15. The incisal guidance angle can be controlled by
the dentist
• The incisal guide angle
depends on the
horizontal and vertical
overlap of anterior
teeth.
• The incisal guide angle
can be lowered by:
• decreasing the vertical
overlap
• or increasing the
horizontal overlap
• Generally, it should be
made low as much as
possible.

16. C- Compensating curve
• The anteroposterior and
lateral curvatures in the
alignment of the occluding
surfaces and incisal edges of
artificial teeth which are used
to develop balanced
occlusion.
• The anteroposterior curve is
useful in creating balance in
protrusive excursions
• The cross-arch curve
provides balance in lateral
movements.

17. Compensating curve
• The form of the
compensating curve
is entirely under the
control of the
dentist.
• By inclining the long
axes of the teeth, the
dentist is able to
increase the curve to
create a balanced
occlusion.

18. D- Orientation of the occlusal plane
 Parallel to ala-tragus
line.
 Or from angle of
mouth to one-half the
height of the
retromolar pads.
 No dentist control

19. The relationship between the factors of
balanced occlusion
 If the condylar
guidance is
great :
 a-The incisal
guidance can be
decreased.
 b-The compensating
curve can be
increased.

20. The relationship between the factors of balanced
occlusion
 The incisal
guidance should be
maintained law as
much as possible.
 If esthetic
necessitate the
increase of vertical
overlap the
compensating curve
should be increased
to adjust the scale.

21. References
• 1- Academy of Prosthodontics (2013): The glossary of prosthodontic terms, J.
Prosthet. Dent.
• 2- Howat A.P, Capp N.J, Parrett N.V.J: A color atlas of occlusion and mal occlusion.
Wolf publishing LTD, London, 1991
• 3- Dawson P. E: Functional occlusion from TMJ to smile design. Mosby Inc., St.
Louis, 2007.
• 4. Ramfjord SP, Ash MM: Occlusion, ed 4, Philadelphia, 1983, WB Saunders.
• 5- Thomson H.: Occlusion in clinical practice, Bristol, London and Boston, Whright
P.S.G. 1981.
• 6- Simpson G.W.: On Johnson's Modem Practice in Fixed prosthodontics, 4th. Ed,
Philadelphia, Toronto, W.B. Saunders Co., 1986.
• 7- Winkler, S.: Essential of complete Denture Prosthodontics. 2nd ed. PSG
Publishing Company; 1988.
• 8- Zarb, G.A.; Bolender, C.L.; HicKey, J.C. and carlesson, G.E.: Boucher's
Prothodontic Treatment for Edentulous Patients. 7th. Ed. St-Louis, The C.V.Mosby
Company; 1990
• N, B. All pictures in these slides are copied from the above references and from the
internet.