Application Guide

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Denture Base

Application Guide for Printing Horizontal Orientation

Application: Denture
Subtype: Horizontal Base
Resin: QuraBASE
Software: Alpha 3D

1. Print Analysis

Denture bases rest directly on the user’s gum tissue, so it is important that you use an adequate layer of adhesive underneath the denture for the user’s comfort. Since there will be adhesive there, the surface quality of the bottom does not need to be perfect, and you can use the bottom for supporting.

A. Critical Areas – Do Not Support

  • You will not need supports over any of the top of the base, including in any of the gingival areas or gum surface.

B. Intended Support Area

  • Place supports on the entire bottom of the denture base when printing in horizontal (flat) orientation.

2. Orientation

When supporting horizontally, there is a lot of flexibility. For the best accuracy and appearance, ensure that the tooth area does not need any supports. For most parts, if you set the top of the gum area to as flat as possible.

A. Angle the part so the top of the gum areas are aligned horizontally.

  • In Alpha 3D, select your part and go to Orientation tab. Use the indicators on the model to turn it to your desired angle.
  • Angle the part so that the top of the bounding box has as much area near the top of the base as possible.

B. Raise the part off the platform.

  • In Alpha 3D, you raise a part along with setting up its supports. Go to the Supports tab, and set the height in the parameters.
  • Support Height: 1.5 – 2.0 mm

3. Supports

When supporting this print, Ackuretta recommends doing the following:

  • A. Start by using Auto Support with the settings shown below.
  • B. Go to Manual Support, and remove supports that are grouped up too thoroughly.
  • C. Add supports to areas that have too few supports nearby.
  • D. Change your support settings to the Base Support settings shown below.
  • E. Remove all supports along the lowest points of the print.
  • F. Add supports to that area using the Base Support size to ensure that area is strongly affixed to the build platform.

Base Supports

  • Point Size: 0.5 – 0.9 mm
  • Elbow Size: 0.8 – 1.3 mm
  • Bottom Size: 1.1 – 1.6 mm
  • Support Density: 86%
  • Support Height: 1.5 – 2.0 mm

Fill Supports

  • Point Size: 0.8 – 1.3 mm
  • Elbow Size: 1.1- 1.6 mm
  • Bottom Size: 1.4 – 2.0 mm
  • Support Density: 80%
  • Support Height: 1.5 – 2.0 mm

Note

The size may cause some supports to stick through the bottom of the build platform, and will appear blue. This is not a problem. Your print will still print normally.

Support Area

Support Result

4. Base

Ackuretta recommends adding a base to almost all supported prints. Adding a base allows the print to stick to the build platform securely, and it makes the print easier to remove during post processing.

  • If you use the General support setting, Alpha 3D automatically adds a small base to every support. This small base is sufficient for most prints.
  • Additionally, you can add a base around the entire print using the Base Thickness setting. This makes it easier to remove the print from the build platform.

Warning

A thicker base does not improve print performance. A base of 0.400 mm or thicker may even make a print less likely to succeed.

5. Print

Arrange all of the models that you want to print, and then go to the Print tab.

  • Select your Layer Thickness. Ackuretta recommends 100 microns.
  • Give your print a Job Name.
  • Click Save.

On your printer, make sure that your settings match what you need for your resin.

Diplo / Ackuray Print Settings

  • Buffer Layers: 5 layers
  • First Layer Curing: ×8

FreeShape 120 Settings

  • Burn-In Layers: 4 layers
  • Burn-In Layer Curing Time: ×4 curing time
  • Z-Axis Peel Speed: 900

6. Finishing

After printing, clean, dry, and cut your print supports.

  • Cleaning Alcohol: Ethyl alcohol (95%) or isopropyl alcohol (99%)
  • Ultrasonic Cleaner or Soak Time: 2 minutes
  • Suggested UV Oven: Ackuretta UV Oven
  • Suggested UV Oven Time: 2 minutes on the bottom side, flip, and then 2 minutes on the teeth side.

Tip

With the Ackuretta UV Oven, hold the start button to use flash curing instead of continuous curing. Flash curing will reduce the resin distortion.