▼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 talk page. The course runs in the Fall semester. It is not open edit.

This is a mobilization wedge used by physical therapists to perform manual spinal mobilization techniques and other various exercises. The tool size is 2" X 7" X 4". This tool is normally $34.99. A conservative estimate for the price of PLA is $20/kg. 3D print cost is approximately $3.60. I created this tool using FreeCAD. The FreeCAD and stl files are attached.

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  Completed print. As you can see, the print is incomplete and has poor print quality. This is due to a new calibration issue that has not yet been resolved
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  Design

Bill of Materials

1. In order to print this device, approximately 180 grams of PLA is needed.
   1. All CAD and STL files can be found on YouMagine from the following link:

Tools needed

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

Skills and knowledge needed

• No special skills are needed to print this design.

Technical Specifications and Assembly Instructions

1. There are no assembly instructions. This is a one piece print and it does not require the use of supports when printing. The print however does need to withstand the weight of a person. For that reason, an infill of at least 25% is recommended.
2. A conservative print time estimate is 9 hours.
3. There is no assembly time.

Cost savings

1. This tool is normally $34.99. A conservative estimate for the price of PLA is $20/kg. The print is estimated at 180 grams. 3D print cost is approximately $3.60.
2. A commercial equivalent product can be found at the following link:
3. The cost savings is $31.39 per unit. This is a 90% cost savings.

Benefited Internet Communities

• Doctors without Borders
• Physical Therapist Forum - WebPT
• Physical Therapist Forum - The Student Doctor Network
• UNICEF
• Oxfam

References

• All of the information for this design and the use of this design came from discussing it with practicing Doctors of Physical Therapy.