Ivoclar Vivadent IPS e.max CAD-on - Manual (Page 14)

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Shade Determination – Tooth Shade, Shade of the Prepared
Tooth
Optimum integration in the oral cavity of the patient is the prerequisite for a true-to-nature all-ceramic
restoration. To achieve this, the dentist must observe the following guidelines and notes.
The overall esthetic result of an all-ceramic restoration is influenced by the following factors:
• Shade of prepared tooth (natural preparation, core build-up, abutment, implant)
• Shade of the restoration (framework shade, veneer, characterization)
• Shade of the cementation material
The optical effect of the preparation shade must not be underestimated during the fabrication of highly
esthetic restorations. For that reason, the shade of the preparation should be determined together with
the desired tooth shade in order to select the suitable block. Especially with severely discoloured prepara-
tions or non-tooth-shaded build-ups, this is of utmost importance. In order to achieve the desired esthetics,
the shade of the prepared tooth must first be determined.
Preparation Shade
– Prepared natural tooth
– Core build-up
– Implant, abutment
Cementation material
Desired tooth shade
Responsibility of the Dental Office Responsibility of the Laboratory
Restoration Shade
– Framework shade
– Veneer
– Characterization
Shade determination of the natural tooth
After tooth cleaning, the tooth shade of the non-prepared tooth and/or the adjacent teeth is
determined with the help of a shade guide. Individual characteristics have to be considered when
determining the tooth shade. If a crown preparation is planned, for example, the cervical shade should
also be determined. In order to achieve the best possible true-to-nature results, shade determination
should be carried out at daylight. Furthermore, the patient should not wear clothes of intensive colours
and/or lipstick.
Die shade selection
In order to facilitate the reproduction of the desired tooth shade, the shade of the preparation is
determined with the help of the IPS Natural Die Material shade guide. This enables the technician to
fabricate a model die similar to the preparation of the patient, on the basis of which
the correct shade and brightness values of the all-ceramic restorations may
be selected.