Ivoclar Vivadent Zenostar - Manual (Page 11)

11
Determining the shade of the natural tooth
After tooth cleaning, the shade of the non-prepared tooth and/or the adjacent teeth is determined with the help of a shade guide.
Individual characteristics should be considered when assessing 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 selection should be
carried out at daylight. Furthermore, the patient should not wear clothes of intensive colours or lipstick.
Selecting the shade of the prepared tooth
After the tooth has been prepared, the shade of the tooth preparation should be determined with the help of an IPS Natural Die
Material shade guide to ensure that the desired tooth shade can be reliably reproduced. 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
restoration may be selected.
Shade selection using an A-D shade guide
Selecting the shade of the prepared tooth