Influence of Patellar Resurfacing Versus Nonresurfacing in Total Knee Arthro-plasty of Osteoarthritis on Postoperative Effect and Complication

Objective To explore the influence of patellar resurfacing(PR) versus nonresurfacing in total knee arthroplasty(TKA) of osteoarthritis(OA) on postoperative effectiveness and complication.Methods From January 1st,2007to December 31st,2011,170 patients(237 knees) with osteoarthritis underuene total knee arthroplasty.The patients received resurfacing(126 knees) or retention of patellar(111 knees).Evaluation and comparison for scores of knee HSS and anterior knee pain,range of motion(ROM) of knees,maximum flection degree,flexion deformity,informations of surgical operation and patients′satisfaction were done from preoperatively to final followed-up postoperatively.The data were analyzed using SPSS 17.0 software.Results Out of 170 cases(237 knees),161 cases(213 knees) had been followed up for an average of(40.94±8.02) months.In resurfacing patella group,knee HSS and anterior knee pain scores increased from(±s,40.19±8.14) and(4.13±1.08) preopemtively to(87.45±6.00) and(19.47±4.04) postoperatively,which is from(40.00±6.74) and(3.58±2.26) preoperatively to(88.93±4.92) and(13.61±3.89) in non-resurfacing patella group.The satisfactory rate of resurfacing patella group was 80.91%,and the other was 61.17%.There were significant differences in both groups in anterior knee pain score,patients′satisfactory rate,operation time and intraoperative blood loss,but no significant difference between the two groups in scores of knee HSS,range of motion(ROM) of knees,maximum flection degree and flexion deformity at the last follow-up time point.Conclusion If anterior knee pain is severe,patients are with high expectations,operation time is limited or patients′ blood type is rare,PR should be determined during TKA treating.