MDS AIPGDEE preparations B-IDS | Virginia bridge MCQ

Resin retained PFM in which the salt particles are incorporated to produce rough retainers is known as:-
a. Maryland Bridge.
b. Cast mesh fixed partial denture
c. Rochette bridge
d. Virginia bridge

ANS D Virginia bridge

Developed at Virginia commonwealth university school of dentistry that involves a “lost salt crystal” technique (COMEDK-06). On the working cast the abutments were coated with a model spray and a lubricant is then applied. Within the outlines of the retainer specially sized salt crystals 150- 250 µm are sprinkled over the surface in a uniform layer leaving a 0.5 mm border without crystals at the periphery of the pattern. This is followed by fabrication of resin pattern. After pattern fabrication, salt crystals are dissolved from the pattern. This permits the use of any metal ceramic alloy.