The asymmetrical pattern can affect different parts of the implant at the same time. This could include the front, back, and/or sides of the joint surface.
There may be scratches or wear patterns all the way through the implant. It sounds like this is what has happened to yours. Once your surgeon removes the insert, an examination of the wear pattern may help show what is the problem.
Location, type, and depth of wear pattern will be observed. This kind of information is helpful for surgeons and scientitsts who are trying to improve TKR implant design and results.