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Removable Partial Dentures > Occlusion for the Partially Edentulous Patient > Flashcards

Occlusion for the Partially Edentulous Patient Flashcards

1
Q

what is mutually protected occlusion also known as

A

optimal functional occlusion

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2
Q

what is mutually protectde occlusion

A
  • multiple, even, bilateral, simultaneous contacts of the posterior teeth in MIP with the mandible in CR position
  • MIP and CR are coincident
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3
Q

the anterior teeth exhibit _____ occlusal contacts as compared to posterior teeth in MIP

A

lighter

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4
Q

posterior teeth are axially loaded in _____

A

MIP

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5
Q

in excursive movements there is_____ guidance and _____ guidance

A

canine and anterior

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6
Q

anterior teeth protect ____ and vice versa

A

posterior teeth

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7
Q

the _____ teeth withstand the majority of the load in MIP, protecting anterior teeth from high loads

A

posterior

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8
Q

the anterior teeth disclude the posterior teeth in _________ movements, thereby protecting the posterior teeth from off axis loading

A

excursive movements

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9
Q

what are the occlusal schemes during excursive movements

A
  • canine guidance- anterior guidance
  • group function (unilateral balance)
  • balanced occlusion ( bilateral balance)
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10
Q

where do you begin?

A
  • evaluate the current condition of teeth, supporting structures, intra-oral and peri-oral tissues
  • and occlusion
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11
Q

what do you use to evaluate occlusion

A

intraorally and on articulated diagnostic casts

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12
Q

what is 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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13
Q

what is anterior guidance

A

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

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14
Q

what discludes the posterior teeth when the mandible moves in protrusion

A

the canines, central and lateral incisors

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15
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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16
Q

mandible is a class ____ lever

A

III

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17
Q

the more anterior the resistance occurs, the ____ the impact

A

lesser

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18
Q

more anterior is ____ from the fulcrum

A

further

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19
Q

which tooth has the longest root and best bone support

A

canine

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20
Q

what are the anterior controlling factors

A
  • anterior teeth
  • anterior guidance
21
Q

what determines how the anterior portion of the mandible moves

A

anterior teeth

22
Q

what is anterior guidance controlled by

A

position and contours of anterior teeth

23
Q

what is anterior guidance altered by

A
  • restorations
  • orthodontics
  • extractions
  • caries
  • habits
  • tooth wear
24
Q

anterior guidance is a ____ factor rather than a fixed factor

A

variable

25
Q

what is the anterior guidance angle

A

the angle formed by the intersection of the horizontal plane and the disclusive pathway of the anterior teeth

26
Q

what is anterior guidance angle influenced by

A
  • vertical overlap (VO)
  • horizontal overlap (HO)
27
Q

what does increased VO angle do to anterior guidance angle

A

increases it

28
Q

what does increased HO overlap do to anterior guidance angle

A

decreases it

29
Q

increased anterior guidance angle:

A

-allows steeper cusps on posterior teeth
- decreases the likelihood for occlusal interferences

30
Q

what is 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 bcucal cusps of the maxillary posterior teeth guiding the movement

31
Q

what is balanced occlusion

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

32
Q

what patients is balanced occlusion not acceptable for and why

A
  • for dentate patients
  • promotes tooth wear on natural teeth
  • non working side contacts are extremely destructive and must be avoided
33
Q

when is balanced occlusion an acceptable form of occlusion

A

for removable prostheses

34
Q

describe malocclusion

A
  • lack of posterior occlusion
  • significant wear of maxillary and mandibular anterior teeth
  • mandibular anterior teeth are aupraerupted
  • posterior teeth are supraerupted
35
Q

what is the plane of occlusion

A

an imaginary surface that touches the incisal edges of the incisors and cusp tips of the occlusing surfaces of the posterior teeth

36
Q

the plane of occlusion curves to fit the _____ and _____ of all the teeth

A

occlusal surfaces and incisal edges

37
Q

is the plane of occlusion flat

A

no

38
Q

plane of occlusion is ____ on the mandible

A

concave

39
Q

plane of occlusion is ______ on the maxilla

A

convex

40
Q

what is an interference

A

any unwanted or premature interocclusal contact

41
Q

what are the types of occlusal interferences

A
  • centric interferences
  • working side interferences
  • non working side interferences
  • protrusive interferences
42
Q

why do we need to eliminate occlusal interferences

A
  • potentially destructive
  • interfere with the patients ability to incise properly
    -involve mesial inclines of mandibular posterior teeth and distal inclines of maxillary posterior teeth
  • disruption of normal muscle function
43
Q

where are working interferences located

A
  • posterior teeth
  • same side as the direction that the mandible moves (working)
  • disclude anterior teeth = an interference
  • involves maxillary buccal cusps and mandibular buccal cusps and/or maxillary lingual cusps and mandibular lingual cusps
44
Q

describe non working interferences

A
  • opposite to direction of movement
  • particularly destructive in nature
  • involves maxillary lingual cusps and mandibular buccal cusps
45
Q

the potential for damage in non working side interferences is attributed to:

A
  • changes in the mandibular leverage
  • forces outside the long axes of the teeth
  • disruption of normal muscle function
46
Q

what are the RPD treatments in predoctoral clinic at UMKC

A
  • completed axium record
  • diagnostic casts
  • survey of casts and proposed design
  • articulation of casts and occlusal analysis of exisiting conditions and propposed treatment
47
Q

for most situations you should maintain the existing _____ dimension

A

occlusal vertical

48
Q

ensure adequate _______ space with a suitable occlusal plane

A

interarch/interocclusal space

Removable Partial Dentures (21 decks)

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