Diagnostic models are an essential part of the treatment planning procedure. However, they must be accurate, well-made, and contain as much detail as possible. Arch relationships and tooth form, size, and arrangement should be studied. It may be necessary to consult a specialist with the diagnostic models before the patient’s second visit. Several questions should be asked when reviewing the models:

1. Is repositioning needed for a proper esthetic result?

2. Can restorative dentistry alone achieve esthetic balance?

3. Are periodontal or other surgical procedures necessary for a successful restorative result?
4. Do wear facets indicate a loss of vertical dimension or any other occlusal problem? It might be necessary to wax-up an intended restoration as well as various alternatives to help the patient choose the best one. A wax-up is an important visual aid and enhances communication between the patient and dentist.

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