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Flashcards in Occlusion 2 Deck (22)
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1

2 ways to examine occlusion

1. Dynamic occlusion
- Canine guidance

2. Static occlusion

2

Why do we use 2 colours of articulating paper?

1 to mark static contact in the ICP

1 to mark dynamic contacts when in excursive positions

3

What instruments do we need to mark tooth contacts? (2)

1. Millers forceps
2. Fine articulating paper

4

When should we mark tooth contacts? (4)

BEFORE
1. Preparing a tooth
2. Removing a restoration

AFTER
1. Placement of a crown
2. Placement of a restoration

5

What does the static occlusion include (7)

1. Incisor relationship
2. Molar relationship
3. OJ/OB
4. Xbites
5. Open bites
6. Individual tooth contacts
7. RCP-ICP slide

6

What are functional cusps?

Cusps that occlude with the opposing teeth in ICP

7

What are non-functional cusps?

Cusps that do not occlude with the opposing teeth in ICP

8

How do we check ICP contacts?

Tap teeth together

9

Whats the name for the incisor relationship?

Angles classification

Class I - normal
Class II div I - OJ increased
Class II div II - OB increased
Class III - Reverse OJ

10

In what incisal relationsip is an OB most pronounced?

Class II div II

11

Define a crossbite

Condition where one or more teeth may be abnormally malpositioned buccally/lingually or labially with reference to opposing teeth

12

Define canine guidance (3)

1. Mandible moves to left for example so working side
2. Contact only between the canines
3. No posterior tooth contacts (a space)

This is whats known as a mutually protected occlusion

13

Define grouped function (2)

- Mandible moves to the left (working side)
- Multiple teeth in contact on the left

14

Give an example of a problem in dynamic occlusion

Occlusal interference
- Undesirable tooth contacts that may produce mandibular deviation during closure to ICP or may hinder smooth passage to and from ICP

15

What are the different types of occlusal interference we may see? (3)

1. Working side
2. Non working side
3. Protrusive interference
- Any posterior contact during protrusion

16

What are the 2 types of bruxism?

1. Eccentric
- Grinding

2. Centric
- Clenching

17

What are some clinical signs of bruxism? (4)

1. Toothwear
2. Fractured restorations
3. Tooth migration
4. Tooth mobility

18

What are some symptoms of bruxism? (4)

1. Muscle pain + fatigue
2. Headache
3. Earache
4. Pain + stiffness in the TMJ + surrounding muscles

19

What are the different types of toothwear? (4)

1. Abrasion
2. Attrition
3. Erosion
4. Abfraction

20

Define occlusal trauma

Injury resulting in tissue changes within the attachment apparatus, including:

- Supporting alveolar bone + cementum

21

Classification of occlusal trauma

1. PRIMARY
- Intact periodontium
- No perio disease but we still see movement due to occlusal trauma

2. SECONDARY
- Reduced periodontium
- Due to perio disease + we get movement due to occlusal trauma

3. FREMITUS
- Palpable/visible movement of a tooth when subjected to occlusal forces

22

Examination checklist for checking occlusion (6)

1. Incisor relationship
2. Guidance
3. OJ/OB
4. ICP contacts
5. Working/non working/protrusive contacts
6. Pathology