Occlusion Flashcards

1
Q

definitions

A

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

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2
Q

intra-arch alignment

A

with in the same arch

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3
Q

interarch alignment

A

with opposing arch

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4
Q

Intra-arch alignment characteristics

A
  1. contact areas and tooth form

2. embrasures

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5
Q

axial positioning of intra-arch alignment

A

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

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6
Q

Curve of spee description and function

A

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

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7
Q

curve of wilson descript. and function

A

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

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8
Q

intra-arch alignment variations

A

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

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9
Q

Supraversion

A

supereruption due to lack of opposing tooth

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10
Q

infraversion

A

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

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11
Q

mesioconversion

A

loss of one tooth causing posterior tooth to drift to midline

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12
Q

distoversion

A

tooth moves away from midline, usually pre-molars

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13
Q

Centric relation

A

bone dictated position, condyle and temporal bone (interarch)

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14
Q

Centric Occlusion

A

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

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15
Q

Elevation 2 movements

A
  1. CR

2. CO

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16
Q

Lateral movements

A
  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
Q

protrusion movements

A
  1. anterior movement
  2. determined by temperal bone and anterior teeth shape
  3. posterior teeth should not touch
18
Q

retraction movements

A
  1. opposite of protrusion

2. only anterior teeth contact

19
Q

4 characteristics to ideal occlusion

A
  1. CR=CO
  2. canine protection in lateral movements
  3. no balancing side interference
  4. no posterior interference in protrusion
20
Q

2 traits of premature contacts

A
  1. contact before CO or guided CR

2. instability in patients occlusion

21
Q

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

A

class 3

22
Q

ligaments only restrict..

A

envelope of motion. no ability to move mandible

23
Q

3 traits of muscles

A
  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
Q

overjet characteristics

A
  1. horizontal overlap
  2. avoid biting soft tissues
  3. protects anterior incisal edge
  4. allows for posterior maximal intercuspation
25
Q

underjet

A

maxillary anterior teeth are lingual to mandibular anteriors

26
Q

overbite characteristics

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