The goal of this project was to design an external fixation device used for tibia fractures allowing for controlled axial micromotion at the fracture gap. The main objectives for this device were to exhibit a non-linear stiffness profile while allowing up to a maximum of 2% strain at the fracture gap, eliminating stress shielding while preventing further injury. Our device consisted of a three piece rod: two rigid end pieces connected to a center insert by a compressible material. This material allows the device to compress slightly before the rigid rods take up the load. Prototypes were tested on an Instron and results show that the desired non-linear stiffness is possible. Through the recommended dimensional alterations, this device will allow for a 2% strain at the fracture gap.

• This report represents the work of one or more WPI undergraduate students submitted to the faculty as evidence of completion of a degree requirement. WPI routinely publishes these reports on its website without editorial or peer review.

Creator

• Blackwell, Brian Patrick
• Jabs, Erin Lynn
• Abrahamsen, Lauren Marie
• Curry, Alexander J.

Publisher

• Worcester Polytechnic Institute

Identifier

• 02D215M

Advisor

• Savilonis, Brian James

Year

• 2002

Sponsor

• Tufts University School of Veterinary Medicine

Date created

• 2002-01-01

Resource type

• Major Qualifying Project

Major

• Biomedical Engineering

Rights statement

• In Copyright