Muscle Strength in Patients with Unicompartmental Arthroplasty

Abstract

In comparison with healthy control subjects, persons with an implanted unilateral sledge prosthesis have strength deficits in extension and flexion. A deficit of the extensor muscles, as it has been described previously for patients with a total knee arthroplasty, could not be found.

Changes in pain and physical function during waiting time and 3 months after knee joint arthroplasty

“…Knee flexor and extensor strength levels affect gait speed and prosthesis loading (49,50,53,54). It has been reported previously that arthroplasty patients' gait speed is reduced by 15-20%, and does not fully return within one year after surgery (39,46,56,57). In this study gait speed was low preoperatively and no significant changes were found in gait speed or balance at follow-up.…”

Muscle activity around the knee and gait performance in unicompartmental knee arthroplasty patients: a comparative study on fixed- and mobile-bearing designs

“…In fact, Kleijn et al [19] showed that functional recovery in UKA patients progresses beyond 6 months up to 2 years after surgery, with knee flexion range reaching a maximum at one year, whereas quadriceps muscle recovery may take 1 to 2 years to recover due to the pre-operative atrophy secondary to osteoarthritis [32]. It is reasonable to assume that the present Optetrak patients might have been affected by the muscular limitation present before surgery, as also reported by Fuchs [14]. Another possible explanation might be found in the very different concepts behind the UKA designs assessed in the present study.…”

Comparing the Lower Limb Strength after Total and Unicondylar Knee Arthroplasty

“…These factors could be responsible for a better outcome of the UKA in patient with an active lifestyle. 19,20 This study backs current literature regarding the range of motion after knee Arthroplasty; patients with a UKA have a better range of motion compared with those after a TKA. 1,6,7,21 Literature regarding the Unicondylar knee Arthroplasty and lower limb strength is scare and distinct.…”

“…6 Fuchs et al evaluated the isokinetic strength after Unicondylar knee Arthroplasty and healthy control subjects in 17 patients, where 30% loss of isokinetic strength was observed in patients after an UKA. 19 Braito et al compared the knee extensor strength in 32 patients following minimally invasive UKA and minimally-invasive TKA; no significant difference regarding the knee extensor strength was found 8 weeks postoperative. 22 As these issues are better understood, the UKA may become an even more successful procedure in young and active patients.…”