Distal Femur Fx: ORIF(Open Reduction and Internal Fixation) vs DFR (Distal Femur Replacement Total Knee Arthroplasty)

Subjects will perform the Timed Up and Go Test This test is used to assess mobility. Subjects are asked to wear regular footwear and can use their walking device as needed. Subjects begin by sitting in a standard armchair. Next participants are instructed to walk 10 feet to a designated line at a normal pace. Once they reach the line they are to turn and walk back to the chair and sit down. The test starts on the study staff go signal and ends once the subject is fully seated in the chair. Test will be performed at 6 weeks, 3 months, 6 months, 12 months and 24 months post surgical treatment.

Subjects will complete the KOOS Jr assessment. The Knee Injury and Osteoarthritis Outcome Score (KOOS) is a self-reported outcome measure assessing the patient's opinion about the health, symptoms, and functionality of their knee. It is a 42-item questionnaire, including 5 subscales: symptoms, pain, ADLs, sports/recreation, and quality of life. The maximum score a patient can achieve is 100, indicating no knee problems. The minimum score is zero, indicating severe knee problems.

Subjects will perform the Timed Up and Go Test This test is used to assess mobility. Subjects are asked to wear regular footwear and can use their walking device as needed. Subjects begin by sitting in a standard armchair. Next participants are instructed to walk 10 feet to a designated line at a normal pace. Once they reach the line they are to turn and walk back to the chair and sit down. The test starts on the study staff go signal and ends once the subject is fully seated in the chair. Test will be performed at 6 weeks, 3 months, 6 months, 12 months and 24 months post surgical treatment.

Subjects will complete the KOOS Jr assessment. The Knee Injury and Osteoarthritis Outcome Score (KOOS) is a self-reported outcome measure assessing the patient's opinion about the health, symptoms, and functionality of their knee. It is a 42-item questionnaire, including 5 subscales: symptoms, pain, ADLs, sports/recreation, and quality of life. The maximum score a patient can achieve is 100, indicating no knee problems. The minimum score is zero, indicating severe knee problems.