Ivoclar Vivadent SR Adoro - Manual (Page 35)

35
Practical
Pr
ocedur
e
for
Fixed
Metal-Supported
Restorations
SR Adoro Step by Step
Starting Situation / Framework Fabrication
Starting situation
Fabricate a master model or a model with detachable segments according to the impression in the usual manner. Expose
and mark the preparation margin. Basically, the application of a sealer is recommended to harden the surface and to
protect the stone die. However, the sealer layer must not result in any changes of the dimensions of the stone die. Next,
a spacer may be applied depending on the respective working habit.
Full contouring of the anatomical tooth shape ...
... and fabrication of a silicone key for checking.
Framework design
There are two types of frameworks, i.e. frameworks for full-coverage veneers (ideal space) and frameworks for partial
veneers (limited space). Basically, it is advisable to design a full wax-up and then fabricate a silicone key to check the
space conditions during contouring. When fabricating the frameworks, make sure that the minimum wall thickness after
finishing is 0.3 mm for single crowns and 0.5 mm for bridge abutments. These dimensions are the prerequisite for a stable
metal framework and a durable bond between the metal and composite. If the stipulated framework and connector
dimensions are not observed, delamination and cracking may occur.
Fabrication of a working model with removable segments and with the sealer and spacer applied.