ZRS zrs31 ua F21 + 53 up-L

zrs31 ua F21 + 53 up-L is an exocad DentalCAD anatomy library that combines the F21 upper morphology with the 53 variant on the left side of the upper arch. Within the exocad workflow it is assigned to the tooth position at the start of crown, bridge or full-contour design, and the engine then morphs it to the preparation and antagonist.

The defined cusp arrangement provides a coherent occlusal pattern that simplifies adjustment of contacts and contour. The library can be downloaded and integrated into the designer's tooth shape catalogue. It is intended for technicians who prefer a controlled morphological reference for upper-left positions instead of a generic default tooth.

The same shape is also useful as a stylistic anchor when several units must look like part of the same dentition.