Crowntec for NextDent

Crowntec for NextDent® is a biocompatible Class IIa material* developed for crowns and bridges. The balance between inorganic fillers and the resin give the material its high strength and wear resistance.

The material is easy to finish and polish, and can be stained with all types of composite staining kits. Due to the perfect balance between opacity and translucency the printed crown blends in perfectly between the existing teeth.

Accuracy Tips

In order to achieve good accuracy on Crowntec for NextDent, it is important to follow the part setup instructions below for orientation and supports. Some other key tips are as follows:

  1. 3D Sprint Part Orientation for Crowntec for NextDent is 0°, occlusal side facing print area. For improved occlusal detail, angle occlusal surface 45° from the print area. As shown in the Orientation section below.
  2. Briefly shake the material bottle and pour material into the resin tray of the NextDent 5100.
  3. Between prints, be sure to use the Resin Mixer to gently stir the material in the tray and refill resin tray to the minimum fill level.

    CAUTION: Do NOT press down on the film when stirring.

  4. To remove excess material, clean the printed job with an alcohol-soaked (96%) cloth and possibly a brush soaked in an alcohol solution until all resin remains are completely removed. Then dry the printed jobs thoroughly with an air syringe.
  5. If detail is blurry, white residue is apparent, check for proper cleaning method.If detail remains an issue or accuracy is hard to achieve try run the accuracy wizard for this build style.

Indications

Crowntec for NextDent® is indicated for the following applications:

CAUTION: Follow CAD design guidelines as shown in the Instructions for Use that are provided with the material.

  • Production of permanent crowns, inlays, onlays and veneers
  • Production of temporary crowns and bridges, inlays, onlays and veneers
  • Production of artificial teeth for subsequent insertion into a denture base

Contraindications

Crowntec for NextDent® is contraindicated for the following applications:

  • Maryland bridge, Inlay bridge
  • All forms of cantilever bridges
  • Bruxism of the patient
  • More than one pontic

Orientation

Crowns have to consider both the occlusal side and margin line when orienting in the SW.  The occlusal side should be facing the XY-plane of the grid in 3DSprint™ before orientation rotation. The best starting orientation before checking down facing surfaces is to set the part at 135° of crown occlusal side facing the XY-plane of the grid.

crowntec-0-deg.jpg

Figure 1. The occlusal side of the crown is oriented facing to XY-plane of the grid. This part has NOT been rotated 135°.

Select the View icon and enable the DOWN FACE check box to view the down facing surfaces of the part.

crowntec-down-face.jpg

Figure 2. The DOWN FACE box is checked.

While the crown is rotated 135° so the occlusal surface is facing the XY-plane of the grid, the down facing surfaces (or support side) of the part will turn RED. The crown should continue to be rotated to minimize the occlusal surface facing the XY-plane and NONE of the inner surface of the part is RED.

crowntec-not-rotated-enough.jpg crowntec-optimal-orientation.jpg

Figure 3. The image on the left is not rotated enough, as there is still RED down facing surfaces on the inner side. The image on the right is optimal for orientation.

Add Supports

Add supports to the part using the Create Supports function under the Smart Supports icon. Look at the supports and determine how they may need to be modified. The supports should not be on the fitted surface or on the margin line.

crowntec-supported.jpg

Figure 4. The crown is oriented and supported properly.