Ivoclar Vivadent IPS d.SIGN - Manual (Page 24)

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The framework should reflects the shape of the tooth in a
reduced form. The framework should be designed in such a
way that it supports the cusps so that an even layer of the
veneering ceramic can be used in the cusp/fissure area. In
this way, the masticatory forces are exerted on the frame-
work rather than on the veneering ceramic. Furthermore,
the framework should not have any sharp angles or edges
(see diagram), so that the masticatory forces do not cause
Anterior crowns
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stress peaks, which may cause delamination or cracks. Sharp
angles or edges should be rounded in the wax-up so that
the minimum framework thickness is not compromised. The
wall thickness of the metal framework for single crowns
after finishing should be at least 0.3 mm and 0.5 mm for
bridge abutments (see diagram). For further information,
please refer to the Instructions for Use of the alloy being
used.
1. Functional support of the veneering ceramic
Premolar crowns
Molar crowns
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