Question 173 (part 2) · LDEK · Dental laboratory technology
Indicate laboratory activities of reverse flasking and arrange them in appropriate order:
1) placing the model with mock up denture in plaster, in contra of polymerization form;
2) wax scalding;
3) introducing the acrylic dough to the form;
4) plaster surface isolation;
5) positioning the upper part of the flask and flooding the base with plaster;
6) placing the model with mock up denture in plaster in the base with plaster;
7) processing the finished denture;
8) long-term polymerization;
9) compression molding; 10) isolation of mucous part of the model; 11) layering the artificial teeth and external part of the mock up denture with plaster.
Correct answer is:
2) wax scalding;
3) introducing the acrylic dough to the form;
4) plaster surface isolation;
5) positioning the upper part of the flask and flooding the base with plaster;
6) placing the model with mock up denture in plaster in the base with plaster;
7) processing the finished denture;
8) long-term polymerization;
9) compression molding; 10) isolation of mucous part of the model; 11) layering the artificial teeth and external part of the mock up denture with plaster.
Correct answer is:
- A. 1,4,5,2,10,3,9,8,7.
- B. 1,4,5,11,3,9,2,8,7.
- C. 6,10,4,5,2,3,9,8,7.
- D. 6,11,5,4,3,9,8,2,7.
- E. 1,5,4,3,2,11,9,8,7.
Hint
In reverse flasking the model goes into the counter; its mucosal surface becomes accessible only after the wax is removed.
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