Buildup/IPR Tab

Scales a tooth model mesially or distally according to the value you enter. The minimum increment allowed is 0.1. mm. A negative number denotes IPR and is depicted in red on the tooth model. A positive number denotes buildup and is depicted in blue on the model when you click the Colorize Buildups/Cuts icon on the Tools menu.

When you select the mesial/distal check box for a tooth, this feature automatically fills spaces or removes intersections as needed to close gaps with adjacent teeth.

Keep in mind, however, that by enabling this function subsequent changes in the interproximal gaps will cause the software to recalculate the buildup or IPR for all teeth selected for automatic mesial/distal sizing.

Tip:  To avoid later recalculation, you can remove the check mark after placing it. The IPR/buildup value is retained no matter what  happens to the gap/intersection.

You can prevent recalculation by entering a fixed, defined IPR or buildup value for a tooth or set of teeth in the IPR (-)/Buildup (+) row. This value will not change, even if the automatic IPR or build up is applied to the rest of the arch.

This read-only row shows the mesial/distal overlap or gap between teeth. The amount of overlap is indicated by a negative number. The amount of gap is indicated by a positive number.

Use this feature to add or remove crown length to a single tooth. The amount of reduction or buildup in millimeters for each tooth is measured from the occlusal plane. Except for the incisors (2-2), which can be reduced/built-up distally or mesially, the vertical reduction/buildup is applied to the entire tooth. The minimum increment allowed is 0.1 mm. A negative number denotes polishing/reduction and is depicted in red on the tooth model. A positive number denotes buildup and is depicted in blue on the model.

Use this feature to automatically add length to multiple teeth, using the occlusal plane as the boundary condition.

When you select a check box in this row, this feature automatically levels the tooth to the occlusal plane, building up or reducing the tooth as necessary.

Keep in mind however, that by enabling this function, subsequent changes in the occlusal plane will cause the auto-vertical buildup/reduction function to recalculate the height of all teeth selected for automatic vertical buildup/reduction.

You can prevent this recalculation by entering a fixed, defined offset or buildup value for a tooth or set of teeth in the Vertical Offset row. This value will not change even if the automatic vertical buildup/reduction function is applied to the rest of the arch.

The amount of labial or lingual reduction anticipated by polishing is denoted by a negative number. The amount of buildup anticipated by veneers is denoted by a positive number.

Although lingual and labial reductions or buildups can help to improve the aesthetic alignment, keep in mind that the position of the brackets does not move with the built-up or reduced surfaces.

The buildup or reduction is calculated from the point of maximum buccolingual convexity of the tooth, and then tapers gradually to the gingival and incisor edges. The gingival edge is estimated for each tooth even if the gingival tissue is modeled. In cases where the gingival tissue is modeled, the buildup will at times butt into the gingival edge if the actual gingival edge is more occlusal than the computer estimate of the gingival edge.

An extra buildup or reduction of 0.1 mm is added to any value entered to provide a visual “buffer zone” and soften any sharp angles.

When setting labial or lingual reduction values, keep in mind that any model reduction cannot go beyond the central axis of the tooth.

Allows you to replace a modeled tooth with a template, or repair an asymmetric tooth by mirroring it with the mesial or distal side tooth. See Changing Models below for more information.

The Reset button removes all the values in a row and resets the model accordingly.

The Set All button selects all of the check boxes in a row.