PROS Flashcards
What are two important instruments during the record block stage that record the OVD and if the occlusal plane is parallel to the ala-tragus line?
Willis bite gauge
Foxes bite plane
What do the letters in LIMBO stand for?
Lip support Incisal level Midline Buccal corridor Occlusal plane
When checking lip support for a denture clinically, what are the 3 main things you are looking for?
- That it isn’t too bulky
- That the patient can get their lips together and close
- That the nasolabial angle should be 90 degrees.
What should the freeway space be?
2-4mm
What will the patient’s face look like if the FWS is too large?
The patient will look almost class 3 with a lower jaw further forward. Patients may also look like they are gurning.
What will the patient’s face look like if the FWS is too small?
The patient might. struggle to get a good peripheral seal (might purse their lips in order to close)
What can you use to get the correct shade for a new denture?
Patient preference
Old denture
How do you decide on the correct mould for the anterior teeth?
Take measurements from the distal side of the 13 to 23.
Then measure the height and width of the upper central.
Then using the book you can find the correct corresponding mould.
Once LIMBO is completed and OVD/FWS is decided you must record the patient’s bite. How would you do this?
You would make some notches in the posterior regions of the record blocks. Then use either wax or bite registration paste. You would guide the patient into biting down hard until the paste sets.
Where do lower teeth need to be set?
The neutral zone
What does the neutral zone mean?
The area where the least amount of force is acting on the teeth/denture.
How does making the denture base wider, aid with retention?
The tongue will push down on the denture.
Give an example of a lab slip, after the jaw reg has been taken and you are moving onto the tooth trail.
Jaw reg - tooth trial
Please mount the casts on a semi-adjustable articulator using the jaw registration provided and construct denture for tooth trial. Then also provide the shade and mould.
What are index teeth?
Teeth that naturally occlude together.
Like 26 and 36.
If a patient has no index teeth, what is a reproducible type of position which must be used?
Retruded contact position
Key points
- get patient to relax
- get patients to push their tongue to the roof of the mouth
