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bds3 clinical flashcards > Occlusion 2 > Flashcards

Occlusion 2 Flashcards

1
Q

What is used to mark tooth contacts?

A
  • millers forceps
  • fine articulating paper
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2
Q

Why is it a good idea to have 2 colours of articulating paper?

A
  • one for static contacts
  • one for contacts when moving
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3
Q

what is the function of millers forceps?

A

used to hold articulating paper on occlusal surfaces

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4
Q

when should you mark tooth contacts?

A

Before:
- preparing a tooth
- removing a restoration

After:
- placement of a crown (check guidance is correct)
- placement of a restoration (check you havent altered occlusion & margins aren’t on a direct occlusal contact)

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5
Q

In terms of ICP contacts, what are functional cusps?

A

cusps that occlude with the opposing teeth in the intercuspal position
- lingual cusps of the upper posterior teeth
- buccal cusps of lower posterior teeth

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6
Q

In terms of ICP contacts, what are non-functional cusps?

A

cusps that do not occlude with the opposing teeth in the intercuspal position
- buccal cusps of the upper posterior teeth
- lingual cusps of lower posterior teeth

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7
Q

In terms of ICP contacts, what is a fossa?

A

Depression or co concavity on tooth surface
- functional cusp of a tooth contacts the fossa of the opposing tooth

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8
Q

What is meant by Class II div 1 incisor relationship?

A

increased overjet

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9
Q

What is meant by Class II div 2 incisor relationship?

A

overbite is increased

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10
Q

What is an overbite?

A

Increased vertical overlap of the incisors

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11
Q

what is the normal range for an overbite?

A

2-4mm

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12
Q

What does a large overbite make the patient more susceptible to?

A

Trauma

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13
Q

What is a crossbite?

A

One or more teeth may be abnormally malpositioned buccal or lingually or labially with reference to opposing teeth

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14
Q

What is a mutually protected occlusion?

A

when mandible moves to the left (working side), contact ONLY between canines, NO posterior tooth contacts (a space)

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15
Q

How would you check for a mutually protected occlusion?

A
  • place articulating paper
  • get patient to move jaw to left or right (working side)
  • remove articulating paper & look for marked line left on canine
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16
Q

What is group function (occlusion)?

A

Mandible moves to left (working side), multiple teeth in contact on the left

17
Q

In which patients is bilateral group function frequently seen?

A

Toothwear patients !

18
Q

Explain the movement of protrusion?

A
  • condyle moves forwards and downwards on articular eminence
  • only the incisors ± canines touch
  • no posterior tooth contacts
19
Q

What are occlusal interferences?

A

Undesirable tooth contacts that may produce mandibular deviation during closer to ICP or may hinder smooth passage to and form ICP

20
Q

What are the different types of occlusal interference?

A
  • working side
  • non-working side
  • protrusive
21
Q

What is a working side occlusal interference?

A

When mandible moves to working side, there is an undesirable posterior contact between molars (similar cusps contacting)

22
Q

What is a non-working side contact occlusal interference?

A

Mandible moves to working side and there is an undesirable contact on the non-working side (dissimilar cusps contact)

23
Q

What is a protrusive interference?

A

any posterior contact during protrusion

24
Q

Why do we want to avoid posterior contacts?

A
  • Occlusal interferences cause significant lateral forces
  • musculature is always activated (can cause TMJ pain, hypertrophy of muscles)
  • can cause occlusal trauma
25
Q

What is meant by eccentric bruxism?

A
  • parafunctional grinding of teeth (side to side)
  • oral habit consisting of gnashing, grinding or clenching
  • leads to occlusal trauma
26
Q

What is meant by centric bruxism?

A

Clenching
- pressing and clamping of the jaws and teeth together

27
Q

what are the clinical signs and symptoms of bruxism?

A
  • toothwear
  • fractures restorations
  • tooth migration
  • tooth mobility
  • muscle pain and fatigue
  • headache
  • earache
  • pain and stiffness in the TMJ and surrounding muscles
28
Q

What are the different types of toothwear?

A
  • abrasion
  • attrition
  • erosion
  • abfraction
29
Q

What is occlusal trauma?

A

Injury resulting in tissue changes within the attachment apparatus, including periodontal ligament, supporting alveolar bone and cementum as a result of occlusal forces

30
Q

What is fremitus?

A

palpable or visible movement of a tooth when subjected to occlusal forces

31
Q

What are the examination of an occlusion checklist steps?

A
  • incisor relationship
  • guidance
  • overjet/overbite
  • ICP contacts
  • working/non-working/protrusive contacts
  • pathology

bds3 clinical flashcards (7 decks)

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