The purpose of this case study was to isolate and examine the key elements in a transfemoral interface and determine their impact on the femur and the pelvis using a dynamic medium. There are many variations and theories on the most functional interface design. This case study attempts to verify the significance of certain elements of the transfemoral interface. This case study utilizes static medium (radiograph) to confirm an ideal fit of the transfemoral prosthesis. Once this is achieved the vital elements are isolated and examined using the dynamic medium of the fluoroscope. It attempts to show the reaction of the femur, ischium, and the pelvis during the stages of gait. In examining the vital elements in a dynamic medium, and determining their importance, we can place more emphasis on those elements and de-emphasize the non-vital elements. This could potentially increase comfort and function.