The correct selection of the blank height in relation to the restoration height is decisive for an optimal shade gradient over the entire restoration. Under no circumstances should too low restorations be nested in too high blanks and vice versa, as otherwise the correct shade and a beautiful shade gradient of the restoration can no longer be guaranteed. (see Fig.3)
To achieve the desired result, it is necessary to follow a straightforward workflow. When nesting, the blank should be divided virtually into four horizontal layers and the restoration should be able to be moved up or down by max. ¼. (see Fig. 2) If the restoration is then positioned in the upper or lower area, this ensures obtaining the lighter or darker tooth shade. Therefore, the appropriate blank height should be selected depending on the restoration height. Approximate guide values are given for orientation purposes. (see Fig.4)
Nesting in the CAM software can additionally be facilitated by using the "Ceramill Trusmile" software module. The Ceramill Trusmile visualizes restorations with a natural shade gradient and displays them in the CAD and CAM software similar to the finished denture.
Mon. 21 June 2021, 12:00 AM
5 tips for processing zirconia5 valuable tips for processing restorations with zirconia