Indications
What are temporary restorations?
Temporary restorations are provisional coverage methods used to protect a tooth while a permanent restoration is being fabricated.
What is the custom provisional method?
The custom provisional method involves fabricating a temporary restoration tailored to the specific tooth preparation.
What is the preformed crown method?
It involves using a pre-fabricated shell-like crown that fits over the prepared tooth.
What criteria should a cement meet for provisional crowns?
It should provide adequate strength to retain the temporary restoration while allowing for easy removal.
What is a common occlusal problem when fabricating a provisional?
Occlusal errors or voids due to improper seating of the impression.
What are the categories of provisional coverage?
The categories include custom provisional, preformed crown, and other provisional methods.
What materials are used in custom provisional fabrication?
Materials can include powder/liquid, paste/paste, and light-polymerized options.
What is the purpose of a preformed polymer crown?
To provide a temporary aesthetic solution for teeth while permanent restorations are being made.
What are some types of temporary luting cements?
Types include Zinc-oxide eugenol (ZOE), polycarboxylate, and resin temporary luting cements.
How can you prevent locking on a provisional restoration?
Remove the material while it is still soft to avoid locking into undercuts.
What criteria are used for provisional fabrication?
Criteria include fit, function, and esthetic considerations.
What type of materials are included in custom provisional materials?
Types include hybrid composite resins and other polymer-based materials.
Which type of crowns are used on anterior teeth?
Tooth-colored preformed polycarbonate crowns.
Why might a clear cement be necessary for thin veneers?
To prevent discoloration of the provisional coverage.
What should you do if there are marginal discrepancies?
Reline the provisional with more material and reseat it for setting.
Why is esthetic aspect important for anterior teeth?
The esthetic aspect is crucial to maintain a natural appearance and avoid discoloration when provisional coverage is thin.
What is the setting time for hybrid composite resin?
The setting time is approximately 90 seconds.
What is the main disadvantage of using preformed crowns?
They may not fit as precisely as custom-fabricated options.
How does retention affect the choice of temporary cement?
Preparations with less retention require stronger cement, while well-retained preparations can use weaker cement.
What is the solution for easily removing a provisional crown?
Apply temporary cement around the inner aspect of the margin.
What are the indications for using temporary cement?
Temporary cement is used to hold provisional coverage in place while allowing for easy removal.
What is the advantage of using light-polymerized materials?
They allow for quicker setting times and easy handling during the procedure.
How are preformed crowns sized specifically for each tooth?
They are selected based on the specific dimensions and contours of the tooth.
What are the factors for maintaining the marginal integrity of a provisional crown?
Proper selection of cement, fit of the provisional, and maintaining a proper seal at the margins.
What are the home care instructions for provisional coverage?
Avoid sticky foods, floss carefully, and contact the office if the provisional is loose or lost.