Once the tooth in question has been prepared with acceptable dimensions, it is equally important to make an accurate and dimensionally stable record or impression of the preparation or dental implant, surrounding hard and soft tissues as well as the opposing dental arch so that the restoration created will conform to the required dimensions and ensure the fit is as close as possible without having to make many modifications chair-side.

Impressions can be made digitally or by conventional technique.
With regards to conventional impression techniques, the materials selected should have appropriate physical properties and handling characteristics to allow enough detail reproduction and durability when casting a model, including the ability to withstand effective decontamination procedures.
Generally, impressions of the arch where the preparation is made are in addition silicone using the "wash impression" technique; impressions of the opposing arch are made in alginate.

Digital impressions can be made using dedicated optical scanners.
A review suggests that digital impressions provide the same accuracy as conventional impressions and are found to be more comfortable for patients and easier for dental practitioners.
Once the tooth in question has been prepared with acceptable dimensions, it is equally important to make an accurate and dimensionally stable record or impression of the preparation or dental implant, surrounding hard and soft tissues as well as the opposing dental arch so that the restoration created will conform to the required dimensions and ensure the fit is as close as possible without having to make many modifications chair-side.
Impressions can be made digitally or by conventional technique. With regards to conventional impression techniques, the materials selected should have appropriate physical properties and handling characteristics to allow enough detail reproduction and durability when casting a model, including the ability to withstand effective decontamination procedures. Generally, impressions of the arch where the preparation is made are in addition silicone using the "wash impression" technique; impressions of the opposing arch are made in alginate.
Digital impressions can be made using dedicated optical scanners. A review suggests that digital impressions provide the same accuracy as conventional impressions and are found to be more comfortable for patients and easier for dental practitioners.
Crown (dentistry)