8. Occlusion for RPD Flashcards
Function of recording occlusion
Involves measuring how the teeth meet
Reasons to record occlusion (5)
To help design the denture
To help the technician set-up the teeth
To ensure the denture is stable and is not dislodged in function
Patient comfort
Ensuring loading forces are applied correctly to teeth
Approaches to recording occlusion (2)
Conformist approach
Re-organised approach
Features of conformist approach to recording occlusion (2)
Keeping the occlusion as it currently is
Need to know the position of the teeth in relation to each other
Features of re-organised approach to recording occlusion (2)
Altering the occlusion
Due to tooth wear/not enough index teeth (teeth-teeth meet)
Types of articulators (3)
Plane line/hinge
Average value
Semi-adjustable (used when having to adjust OVD when using fixed restorations)
Methods of recording occlusion (3)
Simple wax
Features of simple wax wafer for recording occlusion (2)
Easy but inaccurate and can deform easily
Can’t easily see the teeth meeting
Features of wax record block and wax for recording occlusion
Easy, quick and can see if natural teeth meet but can mis-record due to wax causing jaw to deviate on closing. The wax cannot be separated from the record block once recorded
Features of wax record block and bite recording paste for recording occlusion (2)
Easy, can separate once recorded and can see if natural teeth meet but some bounce due to material
Record blocks over-trimmed until occlusion to leave relocation notches
Process of using two record blocks (4)
Identify index teeth
Adjust one block to keep index teeth in occlusion
Adjust second block with first one still in to keep index teeth in occlusion
Record occlusion
Process for prescribing position of anterior teeth (4)
Make sure index teeth in occlusion
Mark centreline
Correct incisal plane
Correct antero-posterior position
