Fabrication of the Metal Framework Flashcards
What parts of the design need to be transfered to the lab for fabrication?
- Diagnostic Cast
- Master Cast
- Work Authorization
All parts of the framework are non-flexible except for the…
clasp tips
Casts are blocked out to eliminate __________ areas that will be crossed by the rigid parts of the RPD.
undercut
What is the diagnostic cast for?
Draw, design, and map out the plan for treatment
Design transfer requires what on the casts before sending to lab?
- Surveying table (align tripod marks)
- Mark retentive undercuts
Arbitrary block-out in less critical areas such as:
- Gingival crevices
- Spaces between teeth not in the design
- Gross tissue undercuts
- Areas that would complicate the duplication process
What is relief?
Space between the framework and cast/soft tissue
Where is relief required for the framework?
Beneath framework extension in edentulous areas
- Provide attachment of the denture base
- Form internal finish line
Prepared master casts are duplicated to produce…
an exact copy of master cast in investment material (refractory cast)
Framework pattern will be fabricated on the _________ cast using wax
refractory
An impression using __________ _________ is made of the wax pattern on the refractory cast
reversible hydrocolloid (Agar)
- can also use alginate, reversible plastic gel (polyvinyl chloride)
_________ ________ which has been warmed, is poured and it flows into the duplication flask.
Reversible hydrocolloid
__________ material is used to make the refractory cast
Investment
What do you do after making the refractory cast?
- Waxing and Spruing
- Investing, Burnout and Casting
- Framework Fabrication
During investing you paint on layer of investment about ______ mm thick
3-4
