Ivoclar Vivadent SR Chromasit - Manual (Page 13)

13
Fabricating the model
Fabricate a stone model with detachable segments according
to the impression.
Fabricating the framework / Contouring
Fabricate a wax framework on the model according to the
requirements of the case in question. The following measures
are indispensable to achieve a long-lasting bond between the
framework and veneer: accurate contouring of the margins,
application of retention wires to the pontics and appropriate
application of micro- and macroretention (eg retention
splinters) on the areas to be veneered.
Prepare a cervical metal margin if possible, or prepare a
chamfer. Flatten out the incisal edge into a chamfer, if
possible. Provide sufficient protection of the incisal edge.
Contouring the pontics
Processing instructions
Make sure to provide sufficient protection of the incisal
edge.
Adequate retention is particular important in the case of fully veneered restorations. Anatomical modellation with sufficient protection of the incisal edge on the palatal/lingual surface
Use a wax wire to bring the pontics to the same
level.