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RPD > Occlusion for the Partially Edentulous patient > Flashcards

Occlusion for the Partially Edentulous patient Flashcards

1
Q

MUTUALLY PROTECTED OCCLUSION
also known as OPTIMAL FUNCTIONAL OCCLUSION

A

*Multiple, even, bilateral, simultaneous occlusal contacts of the posterior
teeth in MIP with the mandible is CR position i.e. MIP and CR are coincident.

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2
Q

The — teeth exhibit lighter occlusal contacts as compared to — teeth in MIP

A

anterior
posterior

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3
Q

— teeth are axially loaded in MIP

A

Posterior

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4
Q

In excursive movements there is — guidance

A

canine guidance and anterior

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5
Q

MUTUALLY PROTECTED OCCLUSION
Anterior teeth protect Posterior teeth and vice versa

A

*The posterior teeth withstand the majority of the load in MIP, protecting
the anterior teeth from high loads.
*The anterior teeth disclude the posterior teeth in excursive movements,
thereby protecting the posterior teeth from off-axis loading.

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6
Q

Occlusal Schemes during excursive movements
(3)

A

1) Canine guidance - Anterior guidance
2) Group function (unilateral balance)
3) Balanced occlusion (bilateral balance)

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7
Q

Evaluate the current (2)

A

condition (teeth, supporting structure, intra-oral
and peri-oral tissues)
and
Occlusion

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8
Q

How to evaluate Occlusion
(2)

A

*Intraorally and on Articulated Diagnostic casts

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9
Q

Canine guidance:

A

the canines on
the working side guide the
movement when the mandible
moves laterally causing all other
teeth to disclude

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10
Q

Anterior Guidance:

A

the anterior teeth disclude the posterior
teeth when the mandible moves in protrusion

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11
Q

Contacts between the posterior teeth during excursive movements are considered — that can create damaging effects on teeth and periodontium.

A

interferences

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12
Q

Why is Canine Guidance/Anterior
Guidance the optimal occlusal scheme?
*Mandible - Class III lever
(2)

A

*The more anterior (away from the fulcrum), the resistance (load) occurs, the
lesser the impact (magnitude)
*The canine(s) has the longest root, and best bone support (canine eminence)

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13
Q

ANTERIOR CONTROLLING FACTORS
(3)

A

*ANTERIOR TEETH
*ANTERIOR GUIDANCE
ANTERIOR TEETH: they determine how
the anterior portion of the mandible
moves

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14
Q

ANTERIOR GUIDANCE
Controlled by (2)

A

position and contours of anterior teeth

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15
Q

ANTERIOR GUIDANCE
Controlled by position and contours of anterior teeth
ALTERED BY
(6)

A
  • RESTORATIONS
  • ORTHODONTICS
  • EXTRACTIONS
  • CARIES
  • HABITS
  • TOOTH WEAR
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16
Q

Anterior Guidance is a — rather than a — FACTOR

A

VARIABLE
FIXED

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17
Q

ANTERIOR GUIDANCE ANGLE

A

*THE ANGLE FORMED BY THE INTERSECTION OF THE HORIZONTAL
PLANE AND THE DISCLUSIVE PATHWAY OF THE ANTERIOR TEETH

18
Q

ANTERIOR GUIDANCE ANGLE
Influenced by
(2)

A
  • vertical overlap (VO)
  • horizontal overlap (HO)
19
Q
  • VO overlap — : ANTERIOR GUIDANCE ANGLE —-
A

increase
increase

20
Q

HO overlap — : ANTERIOR GUIDANCE ANGLE —

A

increase
decrease

21
Q

INCREASED ANTERIOR GUIDANCE ANGLE:
(2)

A
  • Allows steeper cusps on posterior teeth
  • decrease likelihood for Occlusal Interferences
22
Q

Group function

A

When the mandible moves laterally, the outer inclines of the mandibular
buccal cusps, on the working side, slide along the inner inclines of the
buccal cusps of the maxillary posterior teeth, guiding the movement.

23
Q

Balanced Occlusion
(2)

A

*Simultaneous contacts on both sides (working and non-working) during lateral
excursive movements (working side contacts and balancing side contacts)
*Contacts between the posterior and anterior teeth during protrusive movement

24
Q

Balanced Occlusion
*not acceptable for
*promotes
*— contacts are extremely destructive and must be avoided

A

dentate pts
tooth wear on natural teeth
non-working side

25
Q

Balanced Occlusion
*not acceptable for
*promotes
*— contacts are extremely destructive and must be avoided

A

dentate pts
tooth wear on natural teeth
non-working side

25
Q

Balanced Occlusion
*not acceptable for
*promotes
*— contacts are extremely destructive and must be avoided

A

dentate pts
tooth wear on natural teeth
non-working side

26
Q

— occlusion can be an acceptable form of occlusion for
removable prostheses

A

Balanced

27
Q

Malocclusion
(4)

A

*Lack of posterior occlusion
*Significant wear of maxillary and mandibular anterior teeth
*Mandibular anterior teeth are supraerupted
*Posterior teeth are supraerupted

28
Q

PLANE OF OCCLUSIONAN

A

IMAGINARY SURFACE THAT TOUCHES THE INCISAL
EDGES OF THE INCISORS AND CUSP TIPS OF THE
OCCLUDING SURFACES OF THE POSTERIOR TEETH

‘Plane’ that curves to fit the occlusal surfaces and incisal edges of all the teeth

29
Q

Plane of Occlusion‘Plane’ that curves to fit the occlusal surfaces and incisal edges of all the teeth
* It is not

A

flat (teeth are positioned in the arches at varying degrees of inclination)
*Concave on the mandible and Convex on the maxilla

30
Q

Interference:

A

any unwanted or premature interocclusal contact

31
Q

Types of Occlusal Interferences
(4)

A

⚫Centric Interferences
⚫Working side Interferences
⚫Non-Working side Interferences
⚫Protrusive Interferences

32
Q

Protrusive Interferences
(4)

A

*Potentially destructive
*Interfere with the patient’s ability to incise properly
*Involve mesial inclines of mandibular posterior teeth and distal
inclines of maxillary posterior teeth
*Disruption of normal muscle function

33
Q

Working Interferences
(4)

A

*Posterior teeth
*Same side as the direction that the mand moves (working)
*Disclude anterior teeth = an interference
*Involve maxillary lingual cusps and mandibular lingual cusps and
possibly maxillary buccal cusps and mandibular buccal cusps

34
Q

Non-working Interference
(4)

A

*Opposite to direction of movement
*Particularly destructive in nature
*Potential for damage attributed to:
*Involve maxillary lingual cusps and mandibular buccal cusps

35
Q

*Potential for damage attributed to:
(3)

A

1.changes in the mandibular leverage
2.forces outside the long axes of the teeth
3.disruption of normal muscle function

36
Q

RPD treatments in Predoctoral Clinic
at UMKC School of Dentistry
(4)

A

*Completed axiUm record
*Diagnostic casts
*Survey of casts and proposed design
*Articulation of casts and occlusal analysis of
existing conditions and proposed treatment

37
Q

Ensure adequate — space with a
suitable occlusal plane

A

interarch/interocclusal

38
Q

Establish, when possible, favorable occlusal schemes
using

A

sound occlusal principals (anterior guidance,
canine guidance, eliminate occlusal interferences)

39
Q

For most situations, maintain the existing

A

occlusal
vertical dimension

RPD (22 decks)

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