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RCD ( Removable complete dentures) > quiz 2 > Flashcards

quiz 2 Flashcards

1
Q

Cusp angles in anatomic denture teeth are what? when are anatomic teeth used?

A

10,20,30,40. For esthetics, coordinated jaw movements, when dentures oppose natural teeth

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2
Q

Non anatomic teeth in dentures

A

0 degree. Used when there are jaw size descrepancies, ridge resorption, uncoordinated jaw movements

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3
Q

overlaps with non-anatomic teeth

A

no vertical overlap, normal horizontal overlap

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4
Q

posterior tooth selection

A

shade, size, number and form

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5
Q

describe the buccolingual size affect of the posterior teeth

A

should be smaller than natural teeth to reduce the size of occlusal table.

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6
Q

the anteroposterio dimension of the posterior teeth

A

is determined by the space between the canine and ascending area of ridge.

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7
Q

should teeth be placed on the ascending area?

A

no. this causes a dislodging force.

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8
Q

vertical length of posterior teeth.

A

depends on length of anterior teeth and available interarch distance

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9
Q

anatomic form cusps of dentures

A

range from 20-45 degrees with average of 33.

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10
Q

when are non-anatomic cusps used?

A

cross-bite relations, TMJ disturbances, neuro-muscular co-ordination loss, ridge resorption.

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11
Q

what jaw relationship classes are good for non-anatomic cusps?

A

2 and 3

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12
Q

in summary when are anatomic denture teeth used?

A

balanced occlusion is achievable, young people, good ridges

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13
Q

in summary when are non-anatomic denture teeth used?

A

old patients with poor ridges and poor neuromuscular control

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14
Q

advantages of anatomic teeth

A

more efficient in cutting food, esthetically acceptable, can be arranged in balanced occlusion

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15
Q

disadvantages of anatomic teeth

A

use adjustable articulator, eccentric records must be taken, clinical remount is essential, balances occlusion is lost during setting, more horizontal forces, frequent relining , fast bone resorption

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16
Q

advantages of non-anatomical teeth

A

comfortable, greater range of movements, less horizontal forces, only centric record needed,

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17
Q

disadvantages of non-anatomical teeth

A

not natural looking, less cutting efficiency, 2 occlusion dimensions, but mandible has 3

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18
Q

when are acrylic teeth used?

A

limited arch space, maxillary denture opposing natural teeth, opposing teeth with gold occlusal surface.

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19
Q

Hanau quints describe what 5 factors that affected occlusal balance

A

condylar inclination, incisal guidance, occlusal plane inclination, cuspal inclination, compensating curve

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20
Q

theilmans formula for balanced occlusion

A

condylar inclinationX incical guidance/ occplaneX cuspal inclinationX comp curve

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21
Q

what happens when one of the factors of theilmans formula is off?

A

the others have to change to compensate for the differences

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22
Q

What is a balancing ramp?

A

its a way to compensate for disclusion . It increases the occlusal plane and or compensating curve

23
Q

more on balancing ramps

A

they provide posterior contact in eccentric positions

24
Q

what should be done with the incisal guidance when using zero degree cusps?

A

it should be decreased.( this would maintain the occlusal plane)

25
Q

what is the one factor that dentists have no control over?

A

condylar inclination

26
Q

what does the minimizing the incisal guidance do in dentures?

A

minimizes the horizontal forces

27
Q

forces in linear occlusion

A

directly vertical to the flat surfaces

28
Q

anatomy of the linear occlusion

A

lower anteriors have 0 vertical overlap, lower teeth sit on flat occlusal plane, lower posteriors buccal surfaces are straight up and down

29
Q

what does monoplane occlusion help with?

A

lateral forces reduced, improves stability

30
Q

monoplane occlusion in the anterior teeth

A

make contact in excursions

31
Q

when can monoplane occlusion be unstable?

A

when condylar guidance is steep( posterior teeth seperate while anterior stay in contact)

32
Q

define balanced occlusion

A

simultaneous contact of upper and lower arches with smooth bilateral gliding from the centric position to eccentric positions

33
Q

what is bilateral occlusal balance?

A

equilibrium onboth sides of denture due to the simultaneous contact of teeth in the centric and eccentric positions. Requires a minimum of 3 contacts for equilibrium

34
Q

what is protrusive occlusal balance?

A

balance between teeth when mandible protrudes

35
Q

what are some advantages of balanced occclusion?

A

distribution of load, stability, reduced trauma, functional movement, efficiency, comfort

36
Q

advantages of bilateral occlusion

A

contacts occur evenly while swallowing, chewing helps seat the denture in a stable position, prevents destructive lateral forces of parafunctional movements

37
Q

how are anatomic and semi-anatomic denture teeth different?

A

degree of cuspal inclination and precision of intercuspal relationships.

38
Q

degree of anatomic denture cusps vs semi-anatomic

A

anatomic is 30 degrees

semianatomic is 10-20 degrees

39
Q

the compensating curve is analogous to what?

A

curve of spee.

40
Q

what is the curve of wilson?

A

medio-lateral curve

41
Q

where does the curve of spee and wilson begin?

A

molar region, the mesiolingual cusp is the only one that touches the plane

42
Q

2nd maxillary molar in curve of spee

A

elevated even more than the 1st molar. its elevated about 15 degrees in average person.

43
Q

where does the mesial buccal cusp of the mandibular 1st molar engage?

A

embrasure between 1st molar and 2nd premolar

44
Q

for bilateral occlusion, what is the first mandibular tooth that is placed?

A

the 1st molar, make sure it occludes where it needs to and is directly over the ridges

45
Q

where does the mandibular second premolar occlude?

A

adjacent margins of the maxillary 1st and 2nd premolars

46
Q

where does the mandibular first premolar occlude?

A

mesial marginal ridge of maxillary 1st PM, there is a space between the canine.

47
Q

where do mandibular premolars go in balanced occlusion?

A

solid centric occlusion.

48
Q

mandibular premolar cusp contact during lateral excursion in bilateral balanced occlusion

A

lingual cusps should not be contacting

49
Q

balanced occlusion for non-anatomic teeth may be accomplished by:

A
  1. compensating curve
  2. tilting the second molar
  3. placing the balancing ramp
50
Q

general considerations for bilateral balanced occlusion

A

ideal balance can be achieved in cases with large ridges.
narrow buccolingual teeth provide ideal balanced occlusion
ideal balance can be achieved by arranging the teeth slightly on the lingual side of the ridge

51
Q

what factors influence balanced occlusion in bilateral occlusion?

A

condylar guidance, occlusal plane, cuspal angulation, compensating curve

52
Q

maintining balancing contacts

A

change occlusal plane angle, increase compensating curves, increase cusp angles

53
Q

how to check for balance with finished dentures

A

put fingers on canines and move on articulator, it should be smooth movements

RCD ( Removable complete dentures) (9 decks)

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