Im set up to have a Patellofemoral joint replacement April first. Im only 36 and have had so many problems with this knee. I have had osteomony ( sp?) lateral release, microfracture chrondroplasty and arthritis scrape 2 years ago and 11 months after surgery I had power wheelchair and broke my shin just under the knee in 4 places. Im not sure what to expect with this surgery and Im worried. Please help!!!!