Knee Arthroplasty in Patients With Poliomyelitis and Extensor Mechanism Deficiency. Review and Experience in Nine Cases
Abstract
Objectives: To report the clinical and functional outcomes of patients affected with post-polio syndrome treated with total knee arthroplasty, evaluating whether the choice of the prosthesis is conditioned by the quadriceps functional deficit. Materials and Methods: patients with post-polio syndrome were evaluated in their muscle deficit condition and with functional tests such as the 10-meter walk test, 2-minute walk test and timed up and go test, as well as Knee Society Score preoperatively and 1 year after knee arthroplasty. Results: All patients significantly improved functional values that directly impacted their quality of life. The Knee Society Score did not present significant differences between the most severe cases with quadriceps deficit with recurvatum and those with less involvement, but the functional tests did show a significant difference between these subgroups. Conclusions: Total knee arthroplasty is a valid treatment alternative in this complex pathology, providing the patient with pain relief, recovery of function and improving their quality of life. The restoration of stability through constrained prosthetic designs is a key factor in the recovery of a functional gait pattern in patients with recurvatum. Patients with quadriceps strength who overcome the resistance of gravity have functional outcomes comparable to those of patients without post-polio syndrome and do not require hinged prostheses.Downloads
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