” DOUBLE STEP REVERSE”( DSR): A NEW PROTOCOL IN POLYVINYLSILOXANES( PVS) IMPRESSION- TAKING PROCESS- TWO CASE REPORTS
Figure 9. Juxta-gingival finish line preparation for both teeth and retraction cord to highlight the end of the preparations
Figure 10. The temporary crowns after a direct rebasing
Figure 11. With a retractin cord into the sulcus, Aquasil Ultimate Wash material is delivered onto the teeth and let set for 3 minutes
duralay posts are transformed in two“ Bio-Hpp”( Bredent) posts. The material is called“ PEEK”( PolyEther-Ether-Ketone) and one of its characteristics is a fact that it has got a Young module very similar to the one of human dentine.( Fig. 4) The two Bio-HPP are tried into the casts to make sure they are tight-fitting and then coated with composite resin; so as to do that we create a so called“ Post-Crown” made of a Bio-Hpp core and composite resin on the outer layer. Endoral x-rays are performed for both the models, in order to radiologically evaluate the spaces be-
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