Application Guide

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Denture Base

Printing Strategy for Denture Bases in Horizontal Orientation

Application: Denture
Subtype: Horizontal Base
Resin: QuraBASE
Layer Thickness: 100 μm
Software: Alpha 3D

1. Print Analysis

Denture bases rest directly on the user’s soft tissue, so it is important that you use an adequate layer of adhesive underneath the denture for the patient’s comfort. The surface quality of the bottom does not need to be perfect because adhesive is added in that place, so you can use the bottom of the model as a support for the rest of the print.

A. Critical Areas – Do Not Add Supports

  • It is not necessary to add supports to the lingual side of the denture base.

B. Intended Support Area

  • You must add supports to the entire side of the denture base that connects to the patient’s soft tissue when printing in horizontal orientation.

2. Orientation

There is a lot of flexibility when you are adding supports to a model in the horizontal orientation. For the best accuracy and appearance, make sure that it is not necessary to add supports to the the tooth area. For most models, you can set the top of the soft tissue area to be as flat as possible.
A. Put the model at an angle so that the top of the gingival areas are horizontally aligned with the build platform.

  • Select the model and open the Orientation panel. Use the handles on the model to put it in the best position.
  • Change the angle of the model so that there is the most possible space in the top of the bounding box and the top of the base.

B. Raise the model off the platform.

  • You can automatically raise the model when you add the supports. Open the Supports panel and use the arrows to set the height parameters.
  • Support Height: 1.5 – 2.0 mm

3. Supports

When adding supports to the model, we recommend the following procedure:

  1. Open the Supports panel, apply the settings as shown below, and click the Auto Support button to add supports.
  2. Click the Manual Support button and remove any supports that are too close together.
  3. Add supports to any areas that have too few supports.
  4. Change the support settings to be the same as the Base Support settings shown below.
  5. Remove all supports along the lowest points of the print.
  6. Add more manual supports (with the Base Support settings) to the lowest points of the print to make sure that area is securely attached to the build platform.

Note

You must select an object to add supports to that specific model. You cannot use the Auto Supports or Manual Support functions with all models at the same time.

Tip

Use the View Slider function to identify the lowest points of the print.

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 extend past the build platform and appear blue. This is not a problem and your object will print as expected.

4. Base

We strongly recommend adding a base to your model because it allows the print to securely attach to the build platform. A base also makes the print easier to remove during processing. The base settings are on the Supports panel.

  • If you use select General on the Type dropdown list, Alpha 3D automatically adds a small base to every support. These small bases are sufficient for most prints.
  • You can also key in a value for the Base Thickness setting to add a base around the entire print. This makes it easier to remove the print from the build platform.

Warning

A thicker base does not improve print performance. A Base Thickness of 0.400 mm or thicker can make a print less likely to succeed.

5. Printing

Put all of the models that you want to print in place.
Then, click the Printing Setup button to open the Printing Setup window and make sure the settings are as follows:

  • Select your printer on the Printer Model dropdown list.
  • Select QuraBASE on the Material dropdown list.
  • Select your Layer Thickness. We recommend a layer thickness of 100 micrometres.

Click the Print button to open the Print window and save your model as a print file. The top of the window shows your Printing Setup settings.

  • Key in a Job Name
  • Click the Save button to save the name and settings.

Alpha 3D slices the model into layers and creates the print file. When the process is complete, it shows the IBF file in a window. You can now send this IBF file to your printer and start the printing process.

6. Finishing

When the printing process is complete, you must clean, dry, and remove the 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; turn the print over; 2 minutes on the top side.

Tip

Hold the Start button on the Ackuretta UV Oven to use flash curing instead of continuous curing. Flash curing reduces resin distortion.