Occlusion Lecture 3 Flashcards Preview

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Flashcards in Occlusion Lecture 3 Deck (21):
1

Where do the lingual cusps of maxillary teeth and buccal cusps of mandibular teeth occlude?

Know this cold. Slide 2, lecture 3

2

if shown an arch be able to differentiate it from maxillary or mandibular.

know this because she will not tell you on the exam/quiz

- use the number or shapes of molar cusps to differentiate

3

horizontal-verticle overlap

the overlap of teeth that can be used to describe overbite if excessive.

- incisal guidance depends on this overlap
- can clinically see the amount of overlap
- Understand what dimensions increase/decrease and wether the teeth have increased/decreased incisal guidance based on changes to the parameters.

4

anterior guidance

the influence of the contacting surfaces of anterior teeth on tooth limiting mandibular movements

- depends on horizontal and vertical overlap dimensions
- guidance can increase if the vertical overlap overlap increases
- guidance decreases with increased horizontal overlap

5

If the vertical overlap increases what happens to the incisal guidance?

it increases.

- what happens if the vertical overlap decreases?

6

If the horizontal overlap decreases what happens to incisal guidance?

It increases.

- what happens if horizontal overlap increases?

7

working side

The side toward which the mandible moves in a lateral excursion.

- side of the mandible that moves to the cheek side

8

nonworking side

The side of the mandible that moves toward the median line in a lateral excursion.

- side of the mandible that moves to the tongue or middle of the face

9

if you move your mandible to the left what is the working and non working side?

mandibular left: working side
mandibular right: nonworking side

- what if the mandible moves to the right?

10

group function

Multiple contact relation between the maxillary and mandibular teeth in the lateral movements on the working side.

- simultaneous contact points of multiple teeth act as a group to distribute occlusal forces

11

canine guidance

canine protected articulation

Form of mutually protected articulation in which the vertical and horizontal overlap of the canines disengage the posterior teeth in excursive movements of the mandible.

- canines glide over each other to prevent occlusal forces from damaging molars, it helps in separating molars
-VERY LIKELY TO BE ON THE EXAM AND QUIZ

12

transverse horizontal axis

hinge axis

An imaginary line around which the mandible may rotate within the sagittal plane

13

hinge movement

rotation

The movement in space characterized by two divergent points moving around a central axis of rotation.

- mandible opening and closing around an axis basically and how the distance between two points (one on the maxilla and another on the mandible) changes with mandibular rotation

14

translatory movement

The movement in space characterized by linear motion with no stationary axis of rotation

- movement of mandible without opening closing it (i.e. grinding mandible anteriorly or posteriorly)

15

balanced articulation

The bilateral, simultaneous, anterior and posterior occlusal contact of teeth in centric and eccentric positions.

- ONLY applies to complete dentures only, NEVER natural occlusion.
- complete dentures dont rock back and forth in maximal intercuspation

16

mutually protected articulation

An occlusal scheme in which the posterior teeth prevent excessive contact intercuspation, and the anterior teeth disengage the posterior teeth in all mandibular excursive movements

- applies to natural dentition

17

What are the 3 functions related to teeth?

- mastication
- speech
- esthetics

18

Occlusal Vertical Dimension (VDO)

distance between two points when in occlusion

Point A: middle of face or nose
Point B: lower face or chin

19

Rest Vertical Dimension (VDR)

distance between 2 points when mandible is in physiologic resting position

20

physiologic rest position

head upright puts the mandible in a position and elevator and depressor muscles are in equilibrium (tonic contraction).

- condyles are neutral

21

Interocclusal Rest Space (IRS)

difference between VDO and VDR

VDR - VDO = IRS