Repairs, Additions and Relines Flashcards
How do you repair a denture that is fractured in the midline?
If it can be relocated, disinfect and send to lab (no impression required).
They will pour the casts, fractured area removed and new acrylic processed.
What would you do if part of the denture has fallen off?
Take impression of the denture in the mouth and send to the lab.
The lab will pour the cast and new acrylic processed into defect.
If the patient lost a tooth off a denture, what would you do?
If they still have the tooth, you can bond it back on using self-cure acrylic.
If they have lost the tooth- you need to determine the shade and mould of the teeth, trim it down and then add it on with self cure acrylic.
If dentures keep breaking, what could you add to increase the strength?
Wire mesh
Glass-fibre mesh
Stainless steel wire strengthener in the lower.
What is an immediate addition?
When a tooth is lost after denture construction and tooth added on the day the tooth is extracted.
Done when you need to extract a tooth adjacent to the denture.
How would you carry out an immediate addition?
Take impression of the denture in the mouth.
Send the impression and the denture to the lab to add on the tooth.
Denture returns to the practice, exact the tooth and fit the denture immediately.
- remain in place for 24 hours and then review.
What is a post-immediate addition?
When a tooth is lost after denture construction and at a later date a tooth is added.
Same procedure as before but the tooth will already be extracted.
What is a retention addition?
When denture retention is inadequate, may opt to add a clasp.
Usually in stainless steel.
Under what circumstances might you opt to do an immediate denture rather than an addition?
CoCr framework which makes it more difficult to add to- especially if lingual bar is present.
What type of acrylic is used for repairs?
Cold cure acrylic.
What are the advantages and disadvantages of using acrylic?
Advantages
- Cheap
- Easy to use
- Aesthetic
- Easier to add to
Disadvantages
- low impact resistance
- poor resistance to fracture fatigue
- water absorption and candidate growth
- Bleaching of the acrylic can occur
- Allergy to residual monomer
What is the difference between a reline and a rebase?
Reline- adding a new base material to the tissue surface of an existing denture in a quantity sufficient to fill the space which exists between the original denture contour and the altered tissue contour.
Rebase- replacing the entire denture base material of an existing denture.
Why might you want to do a reline?
Mouth anatomy has changed- resorption of bone, ridge changes.
Flabby ridge
Parafunctional habit
Why might you want to do a rebase?
Denture is very loose but the teeth are in good condition.
Why might you choose to do a temporary reline?
Tissue conditioning- dentures are very ill fitting
Post immediate dentures
After implant surgery
Use Coe-comfrt
