Evaluation of the results of Watson Jones tenodesis in chronic lateral instability of the ankle

ObjectiveTo evaluate the results of Watson Jones tenodesis in chronic lateral instability of the ankle.Material and methodThis study includes 16 chronically unstable ankles in 15 patients treated surgically with the use of a Watson Jones tenodesis. The patients were followed for a mean duration of 4 years and 8 months (range, 2–8 years) postoperatively.ResultsResults were classified according to both the criteria proposed by Good et al., and the American Orthopaedic Foot and Ankle Society classification. Of 16 ankles, 9 (56.25%) had an excellent result (grade 1), four (25%), had a good result (grade 2), three (18.75%), had a fair result (grade 3).ConclusionWatson Jones tenodesis is an effective non-anatomic reconstructive procedure for restoration of the ankle stability. No evidence of deterioration of clinical results occured over time. No narrowing of the joint space was detected in any ankle. No loss of peroneal muscle strength was detected, a decrease in calf circumference reported in all case range from 0.5 to 1.5 cm with a mean of 0.65 ± 0.5 cm. No relationship was detected between the clinical results and radiological osteoarthritic changes over the duration of follow up.