mimitabby. When the patella is split in half, they usually just wire it back together. The only problem with that is you usually feel the wires under the skin and its annoying. Sometimes they remove the patella, and replace it with a prostesis. They don't like to remove the patella because you tend to have problems with tracking(the patella slips to one side). I fell at work off a lift onto my right knee(5/06) and had an incomplete patella fracture(just split in the center), mine just healed on its own. From my fall I had bruising in the patella-femoral joint - which I still have. Was your mother's knee flexed when she fell? They should have had someone from the PT department come down and show her how to use the walker. I would assume that's where it would have come from in the first place.
2011 Specialized Secteur Elite Comp
2006 Trek 7100