Jaw Relationship - Crown and Bridge

Question 1

What are we recording when recording jaw relationship

Answer 1

There are several positions into which the mandible can be positioned in relation to the maxilla and this will have an impact on the production of any restoration - the amount of influence depends on the complexity of the restorations and which tooth is to be restored

Question 2

What is the centric relation position of the jaw also known as

Answer 2

Retruded Contact Position (RCP), Hinge axis position (HAP), Terminal Hinge Relation or Ligamentous Position

Question 3

What is the Centric Relation/RCP position of the jaw

Answer 3

• A bilateral, unstrained position of the mandible, in which the condylar disc assembly is in the most superior anterior position in the glenoid fossa and the initial 20mm of incised opening is a pure hinge axis

you might have to look a lot of this up bro loll

Question 4

What is the definition of the Maximum Intercuspal Position (ICP)

Answer 4

• This is the position where there is the most tooth to tooth contact for that individual’s occlusion

Question 5

Ok so quick note about this lecture is that its important af but doesnt make loads of sense

Answer 5

Have a deeper look at RCP vs ICP boi

Question 6

What is the difference between ICP and RCP

Answer 6

There is some slide forward and perhaps some lateral sliding from the RCP to the ICP, rarely are they the same position

Question 7

When do we record RCP and why

Answer 7

RCP is the only reliably reproducible position so is used when we want to make large changes to the occlusion in a fully dentate individual or when we have no guide as to what the occlusion is

Question 8

What is the re-organised approach

Answer 8

This is the use of the RCP to alter the occlusion on a large scale or when we don’t have any guide as to what the occlusion is

Question 9

When do we need to record the ICP

Answer 9

When we conform to the patient’s occlusion, this is what you do every time you place a restoration

Question 10

What is the conformative approach

Answer 10

This is when you use the ICP and conform to the patients occlusion when you place the majority of restorations

Question 11

Why is the Re-organised approach going to be less common in your career

Answer 11

This approach must be specialist lead only

Question 12

If we don’t maintain the occlusion of a patient when doing crown prep what can happen as a result

Answer 12

• Teeth might start over-erupting
• tilting or
• drifting
• Could lead to the development of working and non-working side interferences

Question 13

What materials can you use for bite registration

Answer 13

• Beauty wax
• Polyvinylsiloxane bite registration paste
• Duralay

Question 14

When do you not need to have a bite registration

Answer 14

• If you have a bounded preparation with a stable occlusion you shouldn’t need a bite registration

Question 15

When do you need a bite registration

Answer 15

• When you are preparing the last tooth in the arch
• Multiple preparations
• Multiple anterior preparations