A woman who had a single compartment knee replacement, known as a "uni-compartment" knee replacement, had it inserted incorrectly. The hardware was never properly secured and the physician failed to take an intra-operative x-ray to confirm the correct placement. As a result, the patient was closed up, and told to have physical therapy. Almost immediately, the patient experienced pain in an area of her knee that she never had before. 

Months later, another orthopedic surgeon took x-rays and confirmed that the hardware was not inserted correctly. Another surgery was required to remove the single compartment knee, and in its' place, this woman had to have a total knee inserted.