PARTIAL DENT - Recording the Occlusion

Question 1

when recording the occlusion, what are the 7 steps to consider

Answer 1

1. vertical dimension
2. upper anterior lip support, incisor height and midline
3. adjust lateral, anterior and posterior occlusal plane
4. use wax block and trim
5. seal the blocks intra-orally
6. select mould of teeth
7. shade of teeth

Question 2

what is the OVD?

Answer 2

occlusal vertical dimension

• relationship between maxilla and the mandible

Question 3

what is a wax block able to indate?

Answer 3

• target the OVD - occlusal vertical dimension
• an even contact
• the ICP or RCP

Question 4

what 2 things need to be recorded for the occlusion?

Answer 4

1. the spatial relationship between upper and lower arch
2. the position where to place the missing teeth are teeth

Question 5

what are the 2 approaches taken when determining the spatial relationship?

Answer 5

conformative approach
- keeping the patients current position

re-arranged approach
- changing the current position

Question 6

when can you only use the conventional approach to the spatial relationship?

Answer 6

when the patient has a current stable ICP

Question 7

define the ICP.

Answer 7

inter-cuspal position

the position of maximal inter-digitation of the teeth

• aka a full bite down

Question 8

which 2 Kennedy classes are teeth likely to rock?

Answer 8

class I and class II

Question 9

on dental casts, what do you need to achieve a stable ICP?

Answer 9

occlusal stops spread out on the arch with no slide that don’t rock

Question 10

when can’t you use the conformational approach and have to re-arrange?

Answer 10

• when theres no occlusal stop
• occlusal stops are unstable
• when there is a desired change

Question 11

what are occlusal stops?

Answer 11

when top teeth meet the lower teeth

Question 12

when would occlusal stops be unstable? aka known as deviation in the path of closure - describe what it is

Answer 12

• you can have an occlusal stop but just on one side
• teeth can meet and slide over each other - side ways or forward

= deviation in the path of closure

Question 13

3 ways in which the spatial relationship is measured.

Answer 13

1. hand articulated models
2. tooth borne registration
3. mucosa borne registration

Question 14

when can you use hand articulated models to measure the spatial relationship?

Answer 14

only when there is stable ICP and the replacement teeth position requires no guide

Question 15

how are hand articulated models used?

Answer 15

• match the occlusion with the patients
• models get sealed together
• mount on an articulator

Question 16

when is it suitable to use mucosa borne registration to measure the spatial relationship?

Answer 16

• when there is no stable ICP
• when replacement teeth position requires a guide

Question 17

what is the OVD?

Answer 17

Occlusal Vertical Dimension

Question 18

how do you measure the OVD if there are no occlusal stops?

Answer 18

using resting face height/resting vertical dimension

Question 19

what is the RVD?

Answer 19

resting vertical dimension

usually 3mm AKA freeway space

Question 20

how are the wax blocks sealed with the occlusion?

Answer 20

using blue mousse, silicone adhesive and creating v shaped notches within the wax

Question 21

which articulator do you used for a confirmative approach?

Answer 21

average value

Question 22

which articulator can you use for the reorganised approach?

Answer 22

semi-adjustable