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Smart & efficient – Ceramill CAD/CAM nesting concept for multilayer resins & zirconias

The sophisticated nesting concept within the Ceramill workflow makes it possible to cover two Vita shades with only one Multilayer blank. This applies to both Ceramill A-Temp Multilayer resin as well as Zolid FX Multilayer zirconia. However, there are a few things to take into consideration to obtain the perfect shade result. The correct size is most important here!

Mon. 10 January 2022, 7:27 AM

Smart & efficient – Ceramill CAD/CAM nesting concept for multilayer resins & zirconias

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.

Fig. 1 - The sophisticated nesting concept within the Ceramill systems makes it possible to cover two Vita shades with one Multilayer blank Fig. 1 - The sophisticated nesting concept within the Ceramill systems makes it possible to cover two Vita shades with one Multilayer blank
Fig.2 - Perfect nesting for matching shade results Fig.2 - Perfect nesting for matching shade results
Fig.3 - Incorrect blank height/restoration height ratio selected<br>
Left - a low restoration nested in a blank that is too high (e.g. 20 mm)<br>
Right - A high restoration nested in a blank that is too low (e.g. 14 mm) Fig.3 - Incorrect blank height/restoration height ratio selected
Left - a low restoration nested in a blank that is too high (e.g. 20 mm)
Right - A high restoration nested in a blank that is too low (e.g. 14 mm)
Fig.4 - Ideal ratio blank height/restoration height<br>
14 mm - Perfect for restorations with approx. 6-8 mm height<br>
16 mm - Perfect for restorations with approx. 9-12 mm height<br>
20 mm - Perfect for restorations with approx. 13-16 mm height Fig.4 - Ideal ratio blank height/restoration height
14 mm - Perfect for restorations with approx. 6-8 mm height
16 mm - Perfect for restorations with approx. 9-12 mm height
20 mm - Perfect for restorations with approx. 13-16 mm height
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