Faculty Advisor

Gaudette, Glenn R.


Intramedullary nails are used for fracture fixation in canines. They feature a nail fixed via screws in the medullary canal. The goal of this project was to redesign the system to promote accurate screw insertion, increased patient applicability, and reduced nail contact. The team developed a device featuring a K-wire, self-tapping screws, and countersunk holes for increased screw insertion, adjustable aiming guide for increase patient applicability, and a grooved titanium nail for increased biocompatibility and loading. Testing and analysis confirmed that 2mm 45 degree M3.5 countersunk holes provided a 300% tolerance increase over standard holes, and the titanium grooved nail design resulted in a 59% decrease in nail to bone contact area, failing at forces 18 times greater than bone.


Worcester Polytechnic Institute

Date Accepted

April 2011


Biomedical Engineering

Project Type

Major Qualifying Project



Advisor Department

Biomedical Engineering