Violation
Diagnostic casts for a fixed bridge allow the dentist to 1. visualize the direction of the occlusal forces. 2. assess occlusion more accurately. 3. plan the pontic design. 4. assess the esthetics using a diagnostic wax-up.
All of the above.
(4) only
(2) and (4)
(1) and (3)
(1) (2) (3)