OBJECTIVE/BACKGROUND

1. Development of an Experimental Facility for the Testing of Cadaver Spine Specimens in Flexion and Lateral Bending Design Team: Pratik Sheth, Jason Colgan, Chirag Padalia, Manan Langalia ME 462 – Dr. Hazim El-Mounayri Sponsors – Dr. Alan Jones (ME), Dr. Charles Turner (BME) Spring 2008 DESIGN DESIGN REQUIREMENTS • 2 Separate Modes • Compression/Bending • Pure Bending • Each mode has different upper mount • Force measured at the piston on MTS Machine • Loads variable during compression/ bending OBJECTIVE/BACKGROUND • Device must attach to the MTS 810 Test Frame • Generate pure bending • Allow for compression and bending • Adaptable to different sizes of spine • Easy to assemble & attach to spine • Easy to use • Minimal frictional effects • Reasonable Cost • Spine injuries are commonly fixed with unique combinations of fasteners and hardware developed by the neurosurgeons. • No method to test spinal attachments under bending loads • This limits in determining the best combination for the spinal implants. • As a result, there is a need for developing a procedure which would help fixing the problem. • The main goal is to develop a testing platform which would help achieve pure bending and evaluate new implant designs for spinal injuries. • The testing platform should attach with the MTS 810 machine available on campus. SPINE TESTING PLATFORM Figure 2. Design for Compression/Bending Mode (Model w/ the Exploded View) Figure 3. Design for Pure Bending Mode (Model w/ the Exploded View) COST & CUSTOMER TESTING/VALIDATION • No standardize equipments available for testing corrective spinal attachments. • Cost should not exceed $5000 • Our customers are IU School of Neurosurgery, Dr. Charles Turner, and Dr. Alan Jones. • Von Mises Stress Analysis Performed on the critical parts. CONCLUSION • Testing Platform attaches to MTS 810 • Design for both the modes allows testing of spine specimens to study various load conditions • Critical parts of the design meet stress requirements RECOMMENDATIONS • Build a prototype to test the design • Perform the necessary tests to improve the testing platform to meet the design & cost requirements Figure 4. Stress Analysis on Critical Parts Figure 1. MTS 810