Abstract
PurposeThe purpose of this prospective study was to present the experience of a single center on patellofemoral arthroplasty, in terms of patient-related outcomes.MethodFrom January 2005 to January 2016, 42 patients with isolated patellofemoral osteoarthritis were treated. The patients were assessed using the Oxford Knee Score preoperatively, and one, five, and eight year(s) after surgery. The data of the patients were analyzed using linear mixed effects models. A P value of 0.05 was considered statistically significant.ResultsAmong 42 patients who underwent patellofemoral arthroplasty, only 25 patients (31 limbs involved) had records up to 5 years. There was a significant clinical improvement of Oxford Knee Score postoperatively (P < 0.05), lowering the score on average by 10.4 ± 1.5 one year after surgery and 8.9 ± 1.9 five years after surgery. This improvement was independent of the types of implants (P > 0.05), gender (P > 0.05), age (P < 0.05), and body mass index (BMI) (P < 0.05).ConclusionPatellofemoral arthroplasty can significantly improve the knee function, and this improvement is independent of the type of implant, gender, age, and BMI. However, further studies will need to assess the long-term outcomes of PFA.
Highlights
Osteoarthritis of the knee is a condition that causes significant disability
There was a significant clinical improvement of Oxford Knee Score postoperatively (P < 0.05), lowering the score on average by 10.4 ± 1.5 one year after surgery and 8.9 ± 1.9 five years after surgery. This improvement was independent of the types of implants (P > 0.05), gender (P > 0.05), age (P < 0.05), and body mass index (BMI) (P < 0.05)
Patellofemoral arthroplasty can significantly improve the knee function, and this improvement is independent of the type of implant, gender, age, and BMI
Summary
Osteoarthritis of the knee is a condition that causes significant disability. In the United Kingdom, over 300 million pounds is spent annually on knee arthroplasty. Isolated patellofemoral osteoarthritis (PFOA) is detected only 1 in 10 among the population with knee arthritis. These patients are usually relatively young [1]. TKA has become the optimal choice for isolated PFOA [2] Such choice is further encouraged by the failure of the initial PFAs due to the residual patella malalignment, polyethylene wear, and failure secondary to disease progression of the rest of the knee joint [3]. PFA allows a speedy recovery following the surgery, because it is a relatively less invasive procedure which preserves the natural ligaments, natural femur and tibia, and nearly normal function of the knee joint [4]. According to a randomized clinical trial evaluating 100 patients, the PFOA patients had a shorter recovery period, a greater range of motion, better physical function scores and less knee pain, compared to their TKA counterparts [5]
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