Some patella fractures are relatively minor (hairline crack) and don't require surgery. However, if the patella fractures and the pieces separate enough, it is not possible to straighten the knee. Furthermore, if the cartilage surface is too uneven, these fractures require repair. During the repair, the patella pieces are brought together and lined up as close as possible. They are then secured with a combination of wires or screws. The risk of developing arthritis is always higher when there is damage to the cartilage in a joint.
