We continue to develop resources related to the COVID-19 pandemic. See COVID-19 initiatives on Appropedia for more information.

OSAT 3D Printed Finger Splint

From Appropedia
Jump to navigation Jump to search
MOST Delta filament as guide.JPG This page was part of an MTU course MSE4777 OA and MSE4777 OB/MSE5777/EE4777/EE5777: Open-source 3-D printing

Please leave comments using the discussion tab. The course runs in the Fall semester. It is not open edit.

Preliminary Student Design Warning
Note that this page is a preliminary student design and has not been vetted.
Care should be taken to read critically and weigh the evidence.
Remember non-tested and vetted designs should not be relied on, especially in matters of health and safety. Recommendations to improve this project follow:

  • nonparametric
  • openscad doesnt render design as posted
  • suboptimal printing orientation and design

3D Printed Finger Splint[edit]

Project developed by [Ricardo Reyes http://www.appropedia.org/User:Rdreyes]
This OSAT has been designed but not yet tested - use at own risk.
This OSAT has been prototyped.

You can help Appropedia by contributing to the next step in this OSAT's status.


This is a 3D printed finger splint used for immobilizing fingers to facilitate healing. Within the medical field, studies have been found that 3D printed casts or braces allow a patient to heal faster compared to conventional braces. They are designed with a more aesthetically pleasing look while allowing the wounded limb to breathe and heal faster by not covering the entirety of the limb.

Finger brace.jpeg
Finger brace hand.jpeg

Bill of Materials[edit]

  1. 1.75mm PLA Plastic Filament. Full roll - $23.00. Length required for print - $1.50
    1. All Files located here: https://www.youmagine.com/designs/3d-finger-brace

Tools needed for fabrication of the OSAT[edit]

  1. MOST Delta RepRap or similar RepRap 3-D printer

Skills and Knowledge Necessary to Make the OSAT[edit]

Understanding of OpenScad

Technical Specifications and Assembly Instructions[edit]

  1. Open (or install and then open) Cura
  2. Select File -> Load Model File. Open closed_brace.stl and the model should appear on Cura
  3. The initial model file will appear, but the scale will need to be altered in order for the finger to fit. It is recommended to use a set of calipers to obtain the measurements on the finger.
  4. Click on the model, and then click Scale. Set Size Z(mm) to the thickness of the finger.
  5. Unlock Uniform Scale. Set Size X (mm) to the length of the finger.

Once the scaling settings are set, under the basic tab, change the following

  1. Layer Height (mm): 0.25
  2. Shell Thickness (mm): 1.0
  3. Fill Density (%): 90
  4. Print Speed (m/s): 65

Under the advanced tab, change the following

  1. Initial Layer Thickness (mm): 0.25

The expected time to print will range between 45 to 65 minutes, depending on the brace size for the finger. Since this is one part, there is no assembly required

Common Problems and Solutions[edit]

One common problem will be the length of the brace. If the finger has too much of a gap once the brace is on, the best way will be to scale down the X width in Cura. Ensure that Uniform Scaling is deselected and scale down the X width to accommodate the proper length for your finger.

Cost savings[edit]

  1. Price for Plastic - $1.50
  2. Commercial Splints - $8.00 low end to $25.00 higher end
  3. Low End Savings: $6.50 (82% savings) High End Savings: $23.50 (94% savings)