Blue Sky Plan Manual

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30.5 Remove Undercuts

Remove Undercuts is used to define the direction from which the splint will be inserted. Using this function, you can visualize the areas that run "under" the model (undercuts) and may cause problems when inserting the splint onto the teeth, especially in the case of using stiff materials for fabrication. The splint guide fabricated on this model will be easy to mount.

Remove Undercuts visualization for splint insertion direction in Blue Sky Plan

Articulator visualization shows the user how much the mandible jaw has opened. The distance is shown in the label.

Articulator visualization showing mandible opening distance in Blue Sky Plan

How to work with insert direction: Select the model to work with. Click on Define Insertion Direction. The insertion direction should be adjusted using the rotation ring so that the undercuts are minimized. The insert direction can also be defined by clicking on Define Insertion Direction from View. Reset Insertion Direction will restore the original status of the arrow. The Maximal Allowed Undercut allows the user to set the values for the undercut.

Insert direction rotation ring icon in Blue Sky Plan

If the insertion direction is set incorrectly, the arrow turns red, the user will receive the message Insertion Direction is Invalid and cannot proceed further. It is necessary to set the correct direction in order to proceed.

Invalid insertion direction warning message in Blue Sky Plan

Correctly set insertion direction for splint in Blue Sky Plan