Five year results of selective patellar resurfacing in cruciate sparing total knee replacements.

We performed a prospective study on 129 knees with a selective approach to patellar resurfacing. One hundred and five knees were followed up at an average of 57 months. Of these, 48 knees met the eligibility criteria, thus leaving 57 knees with unresurfaced patellas. Mean follow up was 57 months. Parameters studied included HSS scores, pain, function, range of motion and patellofemoral symptoms including the ability to rise from a chair and to negotiate stairs. Approximately 90% good to excellent results were observed in both groups. The incidence of anterior knee pain and patellofemoral related problems was lower than the average reported in literature. None of the knees was revised for patellofemoral problems. Our findings suggest that the results of patellofemoral resurfacing with modern TKR designs are dependent on a careful patient selection and meticulous surgical technique. With a selective approach to resurfacing, one can achieve a high percentage of good results in both groups. Post-operative anterior knee pain is probably not related to the fact as to whether the patella is resurfaced or not.