Occlusion for Removable Complete Prosthodontics

Question 1

Centric Relation

Answer 1

The position of the mandible in which the condyles are in the most superior and anterior position in the articular fossae, resting
against the posterior slopes of the articular eminences with the
articular discs interposed.

Question 2

Centric Relation for edentulous patients (3)

Answer 2

• Used as the reference position on which the casts are articulated
• It is used because it can be verified and it is repeatable
• It is a jaw position and it is independent of teeth position

Question 3

Master Casts are articulated after using — — records

Answer 3

Centric Relation

Question 4

Physiologic Rest Position

other terms: Rest Vertical Dimension, Postural position

Answer 4

The postural position of the mandible when an individual is resting comfortably in an upright position and the associated muscles are in a state of minimal contractual activity.

Question 5

Interocclusal Space/Distance (approximately – mm)

Answer 5

2-4

Question 6

Occlusal Vertical Dimension (OVD) (2)

Answer 6

•Older term Vertical Dimension of Occlusion (VDO)
•“The distance between 2 selected anatomic or marked
points when in maximal intercuspal position.”

Question 7

Interocclusal Space (free-way space)

Answer 7

The distance between the Rest Vertical Dimension and the Occlusal Vertical
Dimension.

Question 8

Plane of occlusion

Answer 8

“The average plane established by the incisal and occlusal surfaces of
the teeth.”

Question 9

Facebow: orients the

Answer 9

maxilla to the rotational axis in three planes

Question 10

Using a face-bow will result in the

Answer 10

path of opening (arc/path of opening)

on the articulator being the same as the mandible has with the TMJ

Question 11

Changes to the OVD can be made on the articulator if

Answer 11

a face-bow record 
was used (and the casts have been articulated in CR)

Question 12

Occlusion (definition)

Answer 12

The static relationship between the incising and masticating
surfaces of the maxillary and mandibular teeth or tooth analogues.

Question 13

Articulation (definition)

Answer 13

The static and dynamic contact relationship between occlusal surfaces
of teeth during function.

Question 14

Occlusion for Removable Complete Prosthodontics

Goals (5)

Answer 14

• Minimize trauma to supporting structures
• Preserve/maintain remaining structures
• Promote stability of the dentures
• Improve speech and esthetics
• Restore mastication to a reasonable level

Question 15

Types of Occlusions for Removable Complete

Prosthodontics (3)

Answer 15

1. Monoplane/Neutrocentric (including the variation lingualized non-balanced)
2. Lingualized (balanced)
3. Balanced

Question 16

NOT suitable occlusal scheme for Complete Dentures:

Answer 16

Canine Guidance

Question 17

Monoplane Occlusion (Neutrocentric) (including the variation lingualized non-balanced)

Answer 17

Definition: an occlusal arrangement where the posterior teeth have
masticatory surfaces that lack any cuspal height
•Posterior teeth do NOT have cusps
•Teeth are arranged on a flat plane

Question 18

Other parameters of Monoplane Occlusion (4)

Answer 18

•Occlusal plane is parallel to the mandibular ridges and not related to the
TMJ anatomy
•Occlusal plane is completely flat; there is no curve of Spee or Wilson
•No vertical overlap of anterior teeth
•Patients will have to conform to a vertical pattern of mastication

Question 19

Monoplane Occlusion

Advantages and Philosophy (3)

Answer 19

•Occlusal forces are centralized over the ridges and lack of cuspal inclines results
in a more forgiving occlusal scheme
•Provides the patient more freedom in mandibular movements
•Simpler technique in arranging prosthetic teeth and making occlusal adjustments

Question 20

Monoplane Occlusion

Indications (2)

Answer 20

• Severely resorbed ridges

* Skeletal class II, III jaw relations and crossbites

Question 21

Monoplane Occlusion

Disadvantages (3)

Answer 21

• Least esthetic scheme and limiting on the arrangement of anterior teeth
• Difficulty in food penetration (cuspless teeth)???
• Instability of prostheses in excursive movements and possibly in CR???

Question 22

Monoplane Occlusion (non-balanced) 
•In excursive movements: (2)

Answer 22

posterior teeth on the working side are contacting

posterior teeth on the non-working (balancing side) are not contacting

Question 23

Lingualized, non-balanced Occlusion (3)

Answer 23

•Cuspless mandibular posterior teeth arranged on a flat plane
•Only maxillary lingual cusps are in occlusion with central fossae areas of
mand posterior teeth
•All the advantages of the monoplane occlusion and improved esthetics

Question 24

UMKC predoctoral clinic

The majority of the removable treatments (especially CDs) are done using the

Answer 24

Lingualized, non-balanced occlusal scheme

•We utilize cuspless mand posterior teeth arranged on a flat plane

Question 25

Lingualized, non-balanced Occlusion

Answer 25

•Lingual cusps of maxillary posterior teeth are occluding with central
fossae areas of mandibular posterior teeth (bilaterally)

Question 26

Balanced Occlusion

Answer 26

Bilateral simultaneous occlusal contacts of the anterior

and posterior teeth in excursive movements.

Question 27

Balanced Occlusion

Answer 27

Bilateral simultaneous occlusal contacts of the anterior

and posterior teeth in excursive movements.

Question 28

Balanced Occlusionusing anatomic posterior teeth:

Arranging denture teeth with

Answer 28

cusps

anatomic teeth

Question 29

ways to establish a balanced occlusal scheme (2)

Answer 29

comopensating curve

angulation of occlusal plane

Question 30

compensating curve

Answer 30

the AP and ML curvature of occluding surfaces and incsial edges of artificial teeth used to develop balanced occlusion

Question 31

Ways to establish a Balanced Occlusal Scheme
Arrangement of Anterior Teeth
VO overlap:
HO overlap:

Answer 31

ANTERIOR GUIDANCE ANGLE

ANTERIOR GUIDANCE ANGLE

Question 32

Decreasing the ANTERIOR GUIDANCE ANGLE:

Answer 32

•will facilitate establishing Balanced Occlusion

Question 33

Is “Balance” Necessary?
•Numerous studies and reports on this subject in the
dental literature
•Consensus of the studies: (3)

Answer 33

•No patient preference
•No study could prove that Balanced Occlusion is superior
to other Occlusal Schemes
•Balanced Occlusion appears slightly more efficient in
mastication

Question 34

Anterior teeth (2)

Answer 34

• Are arranged to satisfy esthetic and phonetic requirements
• Occlusal contacts are made on anterior teeth only in Excursive Movements in the attempt to minimize stress/forces applied to anterior ridges