Page 15 - Dental Technology 12-3

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prosthetic section 15
DENTAL TECHNOLOGY, JULY-SEPTEMBER 2022

partial, Under-cut is blocked using wax hybrid fashion using a precision attachment
SECONDARY FRAME WORK DESIGN (Figure 20). and cast partial design (Figure 22). The
secondary frame wax pattern design
1. Surveying 3. Duplication sprued, invested and casted (Figure 23).
As per the plan the case is a combination of A cast is duplicated using a flowable dupli- Pink opaquer (NEXCO) is applied for mask-
cast partial clasp and precision attach- cating silicon (Figure 21). Addition ing the framework in the denture followed
ments. The secondary frame model is sur-
Silicon is a most reliable material to achieve by acrylisation using Fluid resin pouring
veyed and checked for the parallelism fine details without any defect. Now the technique. (Figures 24 & 25)
(Figures 18 & 19). Cast partial clasp’s refractory cast is poured using the invest-
area issurveyed in the natural teeth and it ment material (Metavest Ultra) and placed
is kept parallel to the attachment side. So
in a strengthening unit for setting at 4 bar
that we achieve a smooth path of insertion. air pressure. Conclusion: We found that precision
attachment in a special situation like this is
2. Under-cut Block out 4. Finishing very useful and is a simple and unique
By using conventional techniques of cast
The secondary framework is designed in a approach to this situation.

FIG 1 FIG 2 FIG 3

FIG 4 FIG 5 FIG 6

FIG 7 FIG 8 FIG 9

FIG 10 FIG 11 FIG 12