quiz 2

Question 1

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

Answer 1

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

Question 2

Non anatomic teeth in dentures

Answer 2

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

Question 3

overlaps with non-anatomic teeth

Answer 3

no vertical overlap, normal horizontal overlap

Question 4

posterior tooth selection

Answer 4

shade, size, number and form

Question 5

describe the buccolingual size affect of the posterior teeth

Answer 5

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

Question 6

the anteroposterio dimension of the posterior teeth

Answer 6

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

Question 7

should teeth be placed on the ascending area?

Answer 7

no. this causes a dislodging force.

Question 8

vertical length of posterior teeth.

Answer 8

depends on length of anterior teeth and available interarch distance

Question 9

anatomic form cusps of dentures

Answer 9

range from 20-45 degrees with average of 33.

Question 10

when are non-anatomic cusps used?

Answer 10

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

Question 11

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

Answer 11

2 and 3

Question 12

in summary when are anatomic denture teeth used?

Answer 12

balanced occlusion is achievable, young people, good ridges

Question 13

in summary when are non-anatomic denture teeth used?

Answer 13

old patients with poor ridges and poor neuromuscular control

Question 14

advantages of anatomic teeth

Answer 14

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

Question 15

disadvantages of anatomic teeth

Answer 15

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

Question 16

advantages of non-anatomical teeth

Answer 16

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

Question 17

disadvantages of non-anatomical teeth

Answer 17

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

Question 18

when are acrylic teeth used?

Answer 18

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

Question 19

Hanau quints describe what 5 factors that affected occlusal balance

Answer 19

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

Question 20

theilmans formula for balanced occlusion

Answer 20

condylar inclinationX incical guidance/ occplaneX cuspal inclinationX comp curve

Question 21

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

Answer 21

the others have to change to compensate for the differences

Question 22

What is a balancing ramp?

Answer 22

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

Question 23

more on balancing ramps

Answer 23

they provide posterior contact in eccentric positions

Question 24

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

Answer 24

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

Question 25

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

Answer 25

condylar inclination

Question 26

what does the minimizing the incisal guidance do in dentures?

Answer 26

minimizes the horizontal forces

Question 27

forces in linear occlusion

Answer 27

directly vertical to the flat surfaces

Question 28

anatomy of the linear occlusion

Answer 28

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

Question 29

what does monoplane occlusion help with?

Answer 29

lateral forces reduced, improves stability

Question 30

monoplane occlusion in the anterior teeth

Answer 30

make contact in excursions

Question 31

when can monoplane occlusion be unstable?

Answer 31

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

Question 32

define balanced occlusion

Answer 32

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

Question 33

what is bilateral occlusal balance?

Answer 33

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

Question 34

what is protrusive occlusal balance?

Answer 34

balance between teeth when mandible protrudes

Question 35

what are some advantages of balanced occclusion?

Answer 35

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

Question 36

advantages of bilateral occlusion

Answer 36

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

Question 37

how are anatomic and semi-anatomic denture teeth different?

Answer 37

degree of cuspal inclination and precision of intercuspal relationships.

Question 38

degree of anatomic denture cusps vs semi-anatomic

Answer 38

anatomic is 30 degrees | semianatomic is 10-20 degrees

Question 39

the compensating curve is analogous to what?

Answer 39

curve of spee.

Question 40

what is the curve of wilson?

Answer 40

medio-lateral curve

Question 41

where does the curve of spee and wilson begin?

Answer 41

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

Question 42

2nd maxillary molar in curve of spee

Answer 42

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

Question 43

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

Answer 43

embrasure between 1st molar and 2nd premolar

Question 44

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

Answer 44

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

Question 45

where does the mandibular second premolar occlude?

Answer 45

adjacent margins of the maxillary 1st and 2nd premolars

Question 46

where does the mandibular first premolar occlude?

Answer 46

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

Question 47

where do mandibular premolars go in balanced occlusion?

Answer 47

solid centric occlusion.

Question 48

mandibular premolar cusp contact during lateral excursion in bilateral balanced occlusion

Answer 48

lingual cusps should not be contacting

Question 49

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

Answer 49

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

Question 50

general considerations for bilateral balanced occlusion

Answer 50

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

Question 51

what factors influence balanced occlusion in bilateral occlusion?

Answer 51

condylar guidance, occlusal plane, cuspal angulation, compensating curve

Question 52

maintining balancing contacts

Answer 52

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

Question 53

how to check for balance with finished dentures

Answer 53

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