Even more startling, Wright had persuaded case study answer surgeons to accept changes in case study solution operation itself; there was now, for example, a limit as to which prostheses they can use. Each of our nine knee substitute surgeons had his favorite type and brand. Knee surgeons are as certain about their implants as expert tennis players are about their racquets. But case study answer hardware is well case study answer largest cost of case study solution operationthe common retail price is around eight thousand dollars, and some cost twice that, with out a solid proof of real variations in outcomes. Knee implants were largely perfected a quarter century ago. By case study solution nineteen nineties, reports showed that, for some ninety five per cent of sufferers, case study answer implants worked magnificently a decade after surgical procedure.