Static Helical Screw Locking of Pertrochanteric Femur Fractures Using the TFN-A

Inclusion Criteria: * Patients \>18 years of age * AO/OTA 31-A fractures who the surgeon deems eligible for treatment with a cephalomedullary nail * Open and closed fractures * Ambulatory prior to injury (with or without walking aides) * Native (non-fractured, no implant) contralateral hip * Willing and able to sign consent (substitute decision maker) Exclusion Criteria: * Contralateral hip fracture or hip arthroplasty * Fracture not amenable to treatment with a cephalomedullary nail * Non-ambulatory patient * Fractures \>14 days (time of injury to OR) * Bilateral pertrochanteric hip fractures * Non-unions * Pathologic fractures * Periprosthetic fractures * Patients with spinal injury * Incarceration * Pregnancy * Limited life expectancy due to significant medical co-morbidities or medical contra-indications to surgery * Likely problems, in the judgement of the investigators, with maintaining follow-up (i.e., patients with no fixed address, report a plan to move out of town, or intellectually challenged patients without adequate family support).