Drawing the margin line
The first step is to define the margin for all teeth marked as provisional crown or provisional pontic. Start drawing the margin line by clicking on the scan where the margin line of the future preparation should be. Click to add new points. You can still move existing points by dragging and dropping.
After clicking “Apply Margin” you can still move the points, but this will change the shape of the tooth. You can click “Apply Margin” again to re-adapt the shape to the existing tooth.
Manual correction of the tooth boundary detection
The software will detect automatically the shape of the tooth that belongs to the margin you drew. If the detection is not correct, (e.g some parts are missing from the tooth, or parts that belong to the adjacent tooth are included) you can correct it manually.
Areas belonging to the tooth should be yellow, areas belonging to adjacent or gingiva should be grey.
When working on broken dentition, reshape the tooth approximately into the desired shape, because the crown bottom will be created from this form.
Adjust the shape of the teeth as described under Freeforming
The next step is to design the inside of the provisional (the virtual preparation)..
A number of parameters can be adjusted that affect the shape of the crown bottom.
Shoulder Width [A]: This defines the width of the shoulder preparation
Shoulder Slope[B]: This defines the angulation of the shoulder.
Taper[C]: This defines the angulation of the axial walls of the preparation
Setting insertion axis
To change the insertion axis, drag and drop the ball  above to the insertion axis indicator (yellow arrow). If the check box 'Unique insertion direction for jaw'  is checked, then the change will be applied to all teeth; if it is unchecked, you can change insertion axis individually.
When finished adjusting the parameters, click 'Update Crown Bottoms'  to apply the changes.
Choosing the next step
By default, the provisional crown shape will be derived from the original tooth shape in the scan data. In case of heavily damaged dentition, it may be better to design the provisional using library teeth instead. The mode of operation can be selected under 'Next step' :
- Choose 'Design without tooth library' (default) to use original tooth shape for crowns
- Choose 'Design crown using tooth library'. If you select this option, the wizard will automatically copy the existing tooth and use it as a pre-op scan.
When done, click 'Next'. The wizard will guide you through the remaining steps, which are well known to you from 'normal' crown and bridge designs.