PARTIAL DENT - Recording the Occlusion Flashcards
when recording the occlusion, what are the 7 steps to consider
- vertical dimension
- upper anterior lip support, incisor height and midline
- adjust lateral, anterior and posterior occlusal plane
- use wax block and trim
- seal the blocks intra-orally
- select mould of teeth
- shade of teeth
what is the OVD?
occlusal vertical dimension
- relationship between maxilla and the mandible
what is a wax block able to indate?
- target the OVD - occlusal vertical dimension
- an even contact
- the ICP or RCP
what 2 things need to be recorded for the occlusion?
- the spatial relationship between upper and lower arch
- the position where to place the missing teeth are teeth
what are the 2 approaches taken when determining the spatial relationship?
conformative approach
- keeping the patients current position
re-arranged approach
- changing the current position
when can you only use the conventional approach to the spatial relationship?
when the patient has a current stable ICP
define the ICP.
inter-cuspal position
the position of maximal inter-digitation of the teeth
- aka a full bite down
which 2 Kennedy classes are teeth likely to rock?
class I and class II
on dental casts, what do you need to achieve a stable ICP?
occlusal stops spread out on the arch with no slide that don’t rock
when can’t you use the conformational approach and have to re-arrange?
- when theres no occlusal stop
- occlusal stops are unstable
- when there is a desired change
what are occlusal stops?
when top teeth meet the lower teeth
when would occlusal stops be unstable? aka known as deviation in the path of closure - describe what it is
- 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
3 ways in which the spatial relationship is measured.
- hand articulated models
- tooth borne registration
- mucosa borne registration
when can you use hand articulated models to measure the spatial relationship?
only when there is stable ICP and the replacement teeth position requires no guide
how are hand articulated models used?
- match the occlusion with the patients
- models get sealed together
- mount on an articulator
when is it suitable to use mucosa borne registration to measure the spatial relationship?
- when there is no stable ICP
- when replacement teeth position requires a guide
what is the OVD?
Occlusal Vertical Dimension
how do you measure the OVD if there are no occlusal stops?
using resting face height/resting vertical dimension
what is the RVD?
resting vertical dimension
usually 3mm AKA freeway space
how are the wax blocks sealed with the occlusion?
using blue mousse, silicone adhesive and creating v shaped notches within the wax
which articulator do you used for a confirmative approach?
average value
which articulator can you use for the reorganised approach?
semi-adjustable
