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DS1102 > Week 3 - Introduction to Dental Occlusion > Flashcards

Week 3 - Introduction to Dental Occlusion Flashcards

1
Q

What is occlusion

A

The contact relationship between maxillary and mandibular teeth when the teeth are in function

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2
Q

What are the 2 main types of occlusal relationships

A
  • static occlusal relationship
  • dynamic occlusal relationship
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3
Q

What is static occlusal relationship

A

relationship between maxillary and mandibular teeth when jaws are closed

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4
Q

What is a dynamic occlusal relationship

A

relationship during various jaw movements (side to side, up and down)

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5
Q

What are the main muscles which control dental occlusion (5)

A
  • Temporalis
  • Masseter
  • Lateral pterygoild
  • Medial pterygoid
  • TMJ - temporomandibular joint - synovial condylar joint
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6
Q

What is centric relation (CR)

A

the most centric or relaxed position of the condyle in a TMJ
Relation of mandible to the maxilla when the mandibular condyles are in the most superior and retruded position in the TMJ - this is independent of tooth contact

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7
Q

What is centric occlusion (CO)

A

Occlusal relationship of maxillary teeth with mandibular teeth when the condyles are in centric relation during TMJ movements - this is talking about the tooth contact

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8
Q

What is retruded position (RP)

A

position of condyle in posterior most position during TMJ movements

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9
Q

Retruded contact position (RCP)

A

First contact: Point of teeth when the condyles are in retruded position

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10
Q

What is Intercuspal position (ICP)

A

cusps to fossa relation of maxillary and mandibular teeth —> when the cusps of the teeth fit like a jig saw into the fossa of the other teeth when biting

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11
Q

What is overjet

A

horizontal overlap of maxillary teeth over mandibular teeth —> general is 2-4mm
(in reference to anterior teeth)

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12
Q

What is overbite

A

Vertical overlap of maxillary teeth over mandibular teeth —> general is 2-4mm
(in referent to anterior teeth)

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13
Q

What is a class 1 normal occlusion (orthognathic)

A

when maxillary 1st molar MB cusp lies over mid buccal groove of mandibular 1st molar

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14
Q

What is class 2 malocclusion (retrognathic)

A

maxillary molars are relatively forward in relation to mandibular teeth compared to class 1 (over bite)

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15
Q

What are class 2 division 1 bite

A

where maxillary molars are relatively forward in relation to mandibular teeth compared to class 1
and
there are precluded anterior teeth (sticking outwards)

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16
Q

What is a class 2 division 2 occlusion

A

where maxillary molars are relatively forward in relation to mandibular teeth compared to class 1
and
there are one or more retruded maxillary anterior teeth (bending inwards)

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17
Q

What is a class 3 malocclusion (prognathic)

A

lower molars are forward comparative to class 1 and do not fit their corresponding upper molars

18
Q

What is an orthognathic occlusion

A

correct occlusion - class 1 occlusion

19
Q

What is a retrognathic occlusion

A

the mandibular jaw is retruded
Class 2 occlusion

20
Q

What is a prognathic occlusion

A

where mandibular jaw is more protruded
Class 3 occlusion

21
Q

What is a malocclusion mean

A

an incorrect occlusion
refers to class 2 and class 3 occlusion

22
Q
A

overjet

23
Q
A

overbite

24
Q

What are the 3 curves/planes of occlusion

A
  • curve of wilson
  • curve of Spee
  • Curve of monsoon
25
Q

What is the curve of wilson

A

Refers to the occlusal curve on both side of the arch following the cups tips of mandibular teeth (concave). In maxillary teeth it represent as convexity. —> curve in the coronal plane

26
Q

What is the curve of Spee

A

Refers to the anteroposterior curvature of the occlusal surface - following the top of cuspids, bicuspids and molar. —> it is the curve of the posterior teeth in the sagittal plane

Its the curve across the sides of the mouth

It is the natural curvature of the occlusal surfaces of the teeth when viewed from the side.

27
Q

What are the 4 types of dynamic occlusion

A
  • Rotation/hinge axis
  • Translation
  • Lateral Movements
  • Complex
28
Q

What is occlusion rotation/hinge axis

A
  • the movement of the jaw opening and closing through the head of the condyles
  • Allows approx 20-35mm of separation between maxillary and mandibular
29
Q

What is occlusion translation

A

the mandibular moves forward away from the TMJ when the mouth opens

30
Q

What is occlusion lateral movements

A

side to side movements

31
Q

What is the working side

A

the side of the mouth which the mandible has moved during lateral movements

32
Q

What is the non-working side

A

side of the mouth from which the mandible has moved away form during lateral movements

33
Q

What are functional cusps

A
  • the working cups - that takes the move force
  • cups that occlude with the opposing teeth in centric occlusion
34
Q

What are the functional cusps (examples)

A
  • palatal cusps of the maxillary posterior teeth - buccal cusps of the mandibular posterior teeth
35
Q

What are non-functional cusps

A

cusps which do not occlude with the opposing teeth in centric occlusion

36
Q

What are the non functional cusps

A
  • buccal cusps of the upper posterior teeth
  • lingual cusps of the lower posterior
37
Q

What are the 2 approaches by which to manage a patient’s dentition to restore

A
  • Conformative approach
  • re-organized approach
38
Q

What is the conformative approach

A

no change to pre-existing occlusal relationships in the 3 planes (antero-posterior, vertical and horizontal) - this is the simple treatment

39
Q

What is the reorganized approach

A

changing pre existing occlusal relationships to rehabilitate major discrepancies - complex treatment

40
Q

What is used to assess occlusion

A
  • Articulating paper - stain paper
  • Shimstock - articulating foil for fine occlusal adjustments - these are more accurate than articulating paper
  • Clinical observation
41
Q

Difference between articulating paper and shimstock

A

articulating paper is made from paper while shimstock is made from foil and is for fine occlusal adjustments

42
Q

What are digital ways to analyse occlusion

A
  • Digital articulating paper
  • CAD-CAM machines (3D scanners)

DS1102 (30 decks)

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