23
VITA Easyshade
®
Advance 4.0
41
40
39
Modes of operation
4.5.2 Comparison of the shade of the restoration with a user standard
Select the Restoration mode (fig. 39). Now enter any tooth shade or highlight
the user standard icon (fig. 39). Measure the target shade of a ceramic
restoration with which the actual restoration is to be compared. Highlight the
disk icon (fig. 40) and press the Enter key. The shade measurement is now
saved, and will be displayed as the approximate VITA classical A1–D4 shade
and the VITA SYSTEM 3D-MASTER shade. All shade deviations are reset to
zero after saving, and three *** asterisks are displayed. This shade is now
defined as the user standard.
All subsequent shade measurements in this mode (without saving) will be
compared with the user standard and the match displayed with * to ***
asterisks, and the deviations in the LCh value displayed. The user standard
can be recalled at any time as a target shade by activating the user standard
icon (fig. 41). In order to define a new user standard, repeat the procedure
described at the beginning. The previous user standard will then be over-
written.
4.5.3 Determining the shade of a ceramic restoration
In order to determine the shade of the ceramic restoration, define this as a
user standard. The shade is displayed as the VITA classical A1–D4 and the
3D-MASTER shade and helps to choose the VITA ceramic that ensures perfect
reproduction of the shade.
Attention!
The tooth shade measurement will be displayed only after saving.
Note:
To verify a restoration, only the base shade of the
restoration is measured in the middle third of the restoration.
The ceramic material must have a minimum thickness of 0.8 to
1.5 mm to ensure accuracy of the measurement.
Very translucent all-ceramic restorations, such as veneers,
will require the application of a tooth-colored material,
such as VITA Simulate, to obtain accurate measurement results.