Occlusion Flashcards Preview

Tooth Morphology > Occlusion > Flashcards

Flashcards in Occlusion Deck (26):
1

definitions

mandibular movement and the resulting contacts of maxillary and mandibular teeth from these movements

2

intra-arch alignment

with in the same arch

3

interarch alignment

with opposing arch

4

Intra-arch alignment characteristics

1. contact areas and tooth form
2. embrasures

5

axial positioning of intra-arch alignment

relationships created parallel to and with the long axis of the teeth

6

Curve of spee description and function

Anterior-posterior
description-canine tip to DB cusp of maxillary second molar
function-distribute occlusal forces

7

curve of wilson descript. and function

medial to lateral (lingual inclination)
descript.-inclination of teeth
function-distribute occlusal forces

8

intra-arch alignment variations

buccoversion-buccal to normal arch form
linguoversion-lingual to normal arch form
tosoversion-tooth rotate/turns in an otherwise normal position

9

Supraversion

supereruption due to lack of opposing tooth

10

infraversion

ankylosed-tooth does not reach occlusal plane. Generally primary teeth that are retained

11

mesioconversion

loss of one tooth causing posterior tooth to drift to midline

12

distoversion

tooth moves away from midline, usually pre-molars

13

Centric relation

bone dictated position, condyle and temporal bone (interarch)

14

Centric Occlusion

tooth dictated, position where teeth fit together best (interarch)

15

Elevation 2 movements

1. CR
2.CO

16

Lateral movements

1. canine guidance/group function; posterior teeth open up when canines touch
2. working side; when moving mandible to the right side, that side is the working side,
3. balancing side; when the mandible is moved to the right side, the left side becomes the the balancing side

17

protrusion movements

1. anterior movement
2. determined by temperal bone and anterior teeth shape
3. posterior teeth should not touch

18

retraction movements

1. opposite of protrusion
2. only anterior teeth contact

19

4 characteristics to ideal occlusion

1. CR=CO
2. canine protection in lateral movements
3. no balancing side interference
4. no posterior interference in protrusion

20

2 traits of premature contacts

1. contact before CO or guided CR
2. instability in patients occlusion

21

Articulation of a complex hinge joint is what class lever system?

class 3

22

ligaments only restrict..

envelope of motion. no ability to move mandible

23

3 traits of muscles

1. create all mandibular movement
2. CR; posterior position in the envelope of function where mandible should be during function
3. CO; teeth create a muscle memory, and muscles take teeth where they fit best

24

overjet characteristics

1. horizontal overlap
2. avoid biting soft tissues
3. protects anterior incisal edge
4. allows for posterior maximal intercuspation

25

underjet

maxillary anterior teeth are lingual to mandibular anteriors

26

overbite characteristics

1. usually with in the incisal 1/3
2. creates disclusion of posterior in protrusion
3. excessive lingual attrition
4. deficient open bite