Planmeca FIT CAD System User Manual page 162

19 Preparing restoration for milling
154 Planmeca FIT CAD/CAM system
To change the location of the sprue on the restoration, move the placement
indicator along the circle that represents the exterior of the restoration click
one of the arrows.
The recommended locations are:
• Anteriors/posteriors: midway between lingual and the mesial or distal
• Inlays and Onlays: largest proximal box
NOTE
The sprue connects the restoration and the mandrel.
To ensure the sprue is not positioned on a groove:
1. Rotate and inspect the restoration.
2. Move the sprue towards a flatter area of the restoration. This is usually
near the interproximal, but should not be put on the contact area unless
it is necessary.
A Restoration
3. Carefully position the sprue on inlay and onlay restorations. Ensure the
sprue is not attached to an upper surface unless it is an occlusal only
inlay. If the sprue appears to be missing, it is on an interior surface. Try
moving the sprue to a new position. Do not mill a partial sprue if another
position with full sprue is available. The orientation affects the position of
the sprue.
4. Deactivate View Model to ensure the sprue is properly placed.
B Sprue C Mandrel
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