Adjust the shape of the reslice curve

To optimize the reslice curve, the cross-sectional reslice should always be positioned perpendicular to the bone. When creating a new patient model, the program will calculate a default reslice curve which may be edited by the user. When planning according to prosthetic reference ('prosthetic driven planning’), adjust the axial reslice to a plane which will provide maximum prosthetic information such as the prosthetic crown.

Based on the jaw type, volume of interest, and occlusal plane set during the creation of the patient model, a default reslice curve is generated. The user should adjust the reslice curve according to the dental arch.

To adjust the shape of the reslice curve:

1.       Click Reslice Curve  in the CT Editor group on the Patient tab.

2.     The Adjust Reslice Curve action is started.

3.     When the teeth are not clearly visible, adjust the position of the axial reslice - the orange dotted line - to a plane showing the tooth setup (approximately converges with the occlusal plane).

4.     Set the position and size of the cross-sectional reslice by dragging the boundaries of the region shown on the perpendicular viewer.

5.     Adjust the plane according to the dental arch. Fine-tune the calculated curve by manipulating the existing control points or generate a new curve by placing tooth control points.

6.     Click Finish to save the changes.

Manipulate the existing control points

1.       Do one or more of the following:

—     Insert a point Insert-point_16x16.png: add a point in between two existing points.

—     Add an end point Add-end-point_16x16.png: add a point at the end of the curve.

—     Select and remove a point Remove-selected-point_16x16.png

2.     Choose Finish when the curve is looking satisfactory.

Note

For more information on how to perform these actions, go to the Explaining the Reslice Curve action section.

Use tooth control points

1.       Click Re-indicate curve .

2.     Follow the instructions in the tooltips to place the teeth where they should be positioned:

—     Click the Axial view to indicate the position of the right third molar (wisdom tooth).

—     Click the Axial view to indicate the position of the next tooth, the right canine.

—     Click the Axial view to indicate the position of the canine on the left side.

—     Finally, click the Axial view to indicate the position of the fourth tooth, the left third molar (wisdom tooth).

Note

—     The teeth numbers indicated in the tooltips differ depending on the used dental notation system (FDI or US). This notation may be changed in the Preferences.

—     If the teeth marker points are to be positioned where dentition is physically no longer present, position them where they would/should be located.

3.     These four points - 2 third molars and 2 canines - together with five automatically generated control points will form the basis to redraw the reslice curve to fit the dental arch.

4.     Fine-tune the curve, if necessary.

5.     Click Finish when the curve is satisfactory.