Hip Implant mechanics 2

This is a list of other factors that play into mechanics of the patients hip implant

Patient bone quality: Patient bone quality is important because the hip implant is a relatively new part of the body. If the hip implant is able to sustain weight and pressure, there might be a problem with how much the bony mass and muscle of other parts can handle. Often, in geriatric patients, the bony mass may be affected by osteoporosis which is a condition in which there are porous portions of bones that increase risk of breakage. The main bone to look at for quality is the socket of the hip because if it cannot handle the movement of the hip implant, then there is a good chance that it can break or cause immense pain.

Fixation: Fixation has to do with the surgical procedure that involves placement of the hip joint and its alignment with the socket and femur. Fixation is also critical because when the patient is in a neutral position, the hip implant or joint should be aligned in such a way, that there the max pressure should be placed on the hip that specific point. That point is where the body is straightened out. The body should be flush with a flat surface at that point. When the lower extremities are moved, then the hip should release from its neutral position and have less pressure on it. The surgical director must be able to place the hip implant so that it matches such consistencies that the original hip had.

Motion: motion of the original hip implant is important because it mainly involves centripetal force and acceleration. When we lift our leg up, the hip joint spins in a circular motion. When we try to stretch our leg at our side, the hip does not spin, but rather, it lifts like the motion that an oil piston makes. The motion of the implant should be able to match the positions that the original hip made when in different positions.