fabrication of the framework

Question 1

design transfer from diagnostic cast

Answer 1

transferred to a master cast that is then surveyed and tripoded

Question 2

blockout relief of the master cast

Answer 2

used to eliminate undercuts in areas where rigid components will cross

Question 3

arbitrary blockout in less critical areas

Answer 3

ging cervices
spaces btwn teeth not in design
gross undercuts
any area complicating the duplication process

Question 4

relief

Answer 4

space btwn the framework and cast/soft tissue
beneath framework in edentulous areas to provide base attatchment and internal finish line

Question 5

duplicated master cast

Answer 5

Question 6

material of refactory cast? why?

Answer 6

investment material, compensate for alloy shrinkage with expansion

Question 7

waxing/spruing on which cast?

Answer 7

refactory

Question 8

how to prevent nodules of the cast when burning out/casting?

Answer 8

paint on a layer on investment 3-4mm over wax pattern