Dynaloc for Treatment of Femoral Neck Fractures

Inclusion Criteria: * Adult men or women (see age specifications below) with subcapital femoral neck fractures (stable or unstable) confirmed with anteroposterior and lateral hip radiographs, computed tomography, or magnetic resonance imaging (MRI). * Patients between 50 and 69 years of age with any Garden type femoral neck fracture * Patients older than 70 years of age with femoral neck fractures Garden type I and II * Patients older than 70 years of age with a femoral neck fracture Garden types III and IV and contraindication to hemiarthroplasty. * Operative treatment within 4 days (i.e., 72 hours) of presenting to the emergency room. * Patient was ambulatory prior to fracture, though they may have used an aid such as a cane or a walker. * Anticipated medical optimalization of the patient for operative fixation of the hip. * Provision of informed consent by patient or proxy. * Low energy fracture (defined as a fall from standing height). * No other major trauma. Exclusion Criteria: * Associated major injuries of the lower extremity (i.e., ipsilateral or contralateral fractures of the foot, ankle, tibia, fibula, knee, or femur; dislocations of the ankle, knee, or hip; or femoral head defects or fracture). * Retained hardware around the affected hip. * Abnormal opposite hip making end-point evaluation impossible * Infection around the hip (i.e., soft tissue or bone). * Patients with disorders of bone metabolism other than osteoporosis (i.e., Paget's disease, renal osteodystrophy). * Moderate or severe cognitively impaired patients (i.e., Six Item Screener with three or more errors). * Patients with Parkinson's disease (or dementia or other neurological deficit) severe enough to increase the likelihood of falling or severe enough to compromise rehabilitation. * Likely problems, in the judgment of the investigators, with maintaining follow-up. We will, for example, exclude patients with no fixed address, those who report a plan to move out of town in the next year, or intellectually challenged patients without adequate family support.