Efficacy of Patellar Tilt Angle on Early Patient Outcomes after Total Knee Arthroplasty with Patellar Replacement
Objective:To investigate the efficacy of patellar tilt angle on early patient outcomes after total knee arthroplasty(TKA)with patellar replacement.Methods:97 patients with end-stage knee osteoarthritis who underwent TKA with pa-tellar replacement from February 2022 to January 2023 were retrospectively analysed,43 males and 54 females,with an age of(65.45±5.80)years old(60-85 years old).The patients were divided into two groups according to the magnitude of the postoperative patellar tilt angle:tilt angle＜10° for the mild tilt group(73 cases)and tilt angle ≥10° for the severe tilt group(24 cases).The patients were monitored in the outpatient clinic at 1,6,and 12 months after surgery.The presence of anterior knee pain(AKP),the Hospital for Special Surgery(HSS)scores,and the patellofemoral Feller scores were re-corded during the visits.And patients with different degrees of patellar tilt were compared with those with patellofemoral TKA.Postoperative anterior knee pain and knee function in patients with different degrees of patellar tilt in the TKA group were compared.Results:All patients were followed up for(1.56±0.35)years(1.0-2.0 years).There was no sta-tistically significant difference between groups in the patients'baseline data(P＞0.05).The AKP scores,HSS scores,and patellar Feller scores of the patients in both groups were higher than those of the preoperative period at 1,6,and 12 months after surgery,and the differences were statistically significant(P＜0.05).The AKP scores,HSS scores,and patellar Feller scores of patients in the mild tilt group were higher than those of the severe tilt group at 1,6,and 12 months after surgery,and the differences were statistically significant(P＜0.05).Conclusion:Residual patellar tilt after TKA with patellar replacement increases anterior knee pain and limits knee function.
total knee arthroplasty(TKA)patellar replacementknee osteoarthritispatellar tilt angleanterior knee pain
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