Symposium Flashcards
What do we need to assess in regards to occlusion for a new patient (extra orally)
- Palpate TMJ
2. Check for deviations in opening and closing
What do we need to assess in regards to occlusion for a new patient (intra orally)
- ICP
List the functions of articulators
- To replicate haw arrangements and movements
- To allow examination of the occlusion
- To allow fabrication of restorations
- To investigate proposed changes to the occlusion
Name the different types of articulators
- Hinge
- Average value
- Semi adjustable
- Full adjustable
What can a simple hinge articulator recreate
- ICP
2. Opening and closing by rotation
What can an average value articulator recreate
- ICP
- Opening and closing by rotation and translation
- Basic lateral movements
What can we us to get a more accurate value for the arc of rotation
Face bows
What do face bows do
attempts to get the arc of rotation correct
What can a semi adjustable articulator re create
- Position of hinge axis
- ICP
- RCP
- Lateral movements
Give examples of lateral movements
Immediate side shift
Progressive side shift
Why is recording occlusion so important
As we need th technician to be able to put the upper and lower models of the patient together in just the same way as the teeth meet naturally in the mouth
Give examples of some bite registration materials
- Pastes (Silicones/ Polyethers) BLUE MOOSE
2. Waxes / Compound
What are some problems associated with blue moose in dentate patients
It is too accurate so when we try and put the blue moose into the models the models will bounce back and not sit correctly
How should we use blue moose
Only use in the area of the prep NOT WHOLE ARCH
If the models fit together in one way that matches the patient which inter occlusal record should we take
none
If the models would have fitted together but you have prepped a tooth making it now unclear how they fit which inter occlusal record should you take?
Blue mousse over top of prep and get patient to close together in ICP
If there is significant wear and no position for the models to sit which inter occlusal record should you take
Full arch wax
If there are too many missing teeth and there is no stable occlusal position fo the models which inter occlusal record should you take
Wax rims in edentulous spaces and blu moose
What can the fully adjustable articulator replicate?
- Position of hinge axis
- ICP
- RCP
- Lateral movements
What can be adjusted in a fully adjustable articulator
- All surfaces of the glenoid fossa
2.Intercondylar width
ISS
Progressive side shift
Condylar angle
What is occlusion
The way teeth meet
How should teeth meet?
Should meet in such a way that does no over load a weekend cusp or overload the periodontal ligament more than it cn endure
How can overloading happen?
Excessive force due to parafunciton or interference
How can we change occlusion
- Increase OVD
- Creation of different ICP
- Alter lateral guidance scheme
