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Flashcards in occlusion Deck (22)
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1

what is occlusion?

the study of the relationship between upper and lower teeth when they are closed together

2

what is the functional purpose of bringing the teeth together?

chewing and swallowing

3

in a relaxed position, are the teeth usually occluded or apart?

apart

4

from rest the mandible can be closed directly into a position where there is maximum intercuspation of the teeth, this is known as?

intercuspal position

5

describe the position of the the mouth in intercupsal position

- mandible is maximally braced against the maxilla (position the mandible aims for at the end of chewing)
- on posterior teeth, lower buccal cusps and upper palatal cusps occlude again fossa and marginal ridges of opposing teeth
- lower incised edges and canine tips occlude against the cingulum area of opposing teeth

6

what is the name of the metal foil used to measure occlusion?

shimstock

7

how does shim stock test occlusion?

in normal occlsion, the shimstock should be able to be pulled through the teeth

8

which material is used to highlight occlusal contact points?

articulating paper

9

what structures maintain occlusal stability?

- contact with teeth in opposing arch
- contact with adjacent teeth in same arch
- soft tissues

10

what are the 3 processes involved in eating?

inching, chewing, swallowing

11

what does protrusion of the jaw refer to?

jaw sitting down and forwards

12

how is guidance assessed?

moving mandible from intercuspal position outwards

13

what is group function?

when you slide laterally, a number of teeth on your working side are in contact at the same time

14

group function may result in what ?

tooth wear, no prominent cusps

15

what is an articulator?

a divide which holds dental casts in relation to each other, replicates mandibular movement

16

how would you examine occlusion?

- look at teeth position in each arch, are there any irregularities that may affect occlusion
- look at teeth in ICP, does it look stable, are there unopposed, drifted, or over-erupted teeth
- locate contact points in ICP, where are they and how many
- which teeth provide guidance in protrusion and lateral excursion

17

what is attrition?

loss of substance caused by contact of occlusal surfaces, usually parafucntional by either clenching or grinding

18

loss of substance caused by contact of occlusal surfaces, usually parafucntional by either clenching or grinding, is called?

attrition

19

what is erosion?

loss of tooth substance by mechanical process not involving bacteria

20

loss of tooth substance by mechanical process not involving bacteria is called?

erosion

21

what is abrasion?

loss of tooth substance caused by abnormal rubbing from non-dental objects (most commonly brushing)

22

loss of tooth substance caused by abnormal rubbing from non-dental objects (most commonly brushing) is called?

abrasion