Intro to occlusion

Question 1

What is occlusion

Answer 1

How the teeth come together and function

Question 2

What can happen if occlusion is disturbed

Answer 2

Can lead to :
1. Pain
2. Loosening of teeth
3. Fracture of restorations

Question 3

What can happen if we overload a tooth and make it heavy in occlusion

Answer 3

1. Premature contacts
2. Increased lateral forces on poster teeth
3. Excessive force due to parafunction

Question 4

What are occlusal interferences?

Answer 4

Interferences when a patent is bitting up and down usually due to a too high restoration

Question 5

What technique can you use to check you restoration isn’t too high?

Answer 5

Fremitus and articulating paper

Question 6

What symptoms will a patient experience if you place a restoration that is too high?

Answer 6

1. Inflammation
2. Pain in the PDL
3. Bruising + pain
4. Widening of the PDL
5. Increased mobility of tooth

Question 7

Which forces are posterior teeth designed to deal with?

Answer 7

Vertical not horizontal

Question 8

What symptoms can patents with bruxism experience?

Answer 8

1. Increased tooth wear
2. Fracture of restorations
3. Muscle pain
4. Micro cracks

Question 9

What is the function of the Articular emine?

Answer 9

It guides the mandible forward when you slide you jaw forward

Question 10

Where is the Articular emine found?

Answer 10

It is found on the glenoid fossa

Question 11

What is the free way space

Answer 11

The space between the upper and lower teeth at rest

Question 12

What is the typical value of the freeway space

Answer 12

2-4mm

Question 13

What does ICP stand for

Answer 13

Inter cusp position

Question 14

What is the ICP

Answer 14

The position of he mandible when the mandibular and maxillary teeth are maxillary interdigitated

Question 15

What does RCP stand for

Answer 15

Retruded Contact Position

Question 16

Name the key muscles involved in closing the mouth

Answer 16

1. Temporalis
2. Masseter
3. Medial pterygoid
4. Lateral pterygoid

Question 17

Name some jaw movements we talk about in dentistry

Answer 17

Protrusion and lateral movements

Question 18

How does your body prevent horizontal movement form affecting the molars?

Answer 18

Condylar guidance

Question 19

What is the “working” side

Answer 19

The side your jaw is moving to

Question 20

What are the 2 terms we use to describe occlusal schemes

Answer 20

Canine guidance vs group function

Question 21

Describe a patient who is said to have canine guidance

Answer 21

It means only the canines on their working side remain in contact when movies to that side

Question 22

Describe a patient who is said to have group function

Answer 22

When they move their jaw laterally 2 or more teeth remain in contact on the working side

Question 23

Why might older patients be in group function rather than canine guidance

Answer 23

Because over time they have worn down their canines due to grinding

Question 24

What are the problems associated with group functions

Answer 24

Canines come into contact with each other during lateral movement which they don’t like

Question 25

What can we use to check the occlusion of alginate models we have taken?

Answer 25

We can use an articulator

Question 26

Name different types of articulators

Answer 26

1. Simple hinge
2. Average value
3. Semi adjustable
4. Fully adjustable