Surgical management of chronic Achilles tendon ruptures using less invasive techniques.

Background: Surgical management of chronic Tendo Achillis (TA) ruptures usually requires tendon grafting procedures. Several techniques have been described. We examined the outcome of three different less invasive (incisions length less than 3 cm) tendon transfer techniques in the management of patients with a chronic rupture of the TA.

Methods: Of 62 patients (39 males and 23 females; mean age 44.8 years; range 29.3-62 years) with chronic TA ruptures managed operatively, 21 patients had a ≥6cm gap and underwent free ipsilateral semitendinosus (ST) graft (21 patients), whereas patients with smaller gaps had either ipsilateral peroneus brevis (PB) (20 patients) or ipsilateral flexor hallucis longus (FHL) transfer (21 patients). Outcome measures included maximum calf circumference, isometric plantar flexion strength, and the Achilles tendon total rupture score (ATRS), preoperatively and at the last follow up. We also recorded the time to return to activities of daily living (ADL) and sports, and the number of single-leg heel lifts on the affected leg at the last follow up, at an average of 35.4 months.

Results: Patient characteristics between groups were similar. All outcome measures significantly improved after surgery (p<0.001), without differences between the three groups. Return to ADL was possible at an average of 4.5 months. Patients undergoing PB transfer had a slower return to sports compared to the other groups, at 6.9±0.5months versus 6.1±0.8 for the FHL and 5.8±0.6 for the ST groups (t-test p=0.005 and p<0.001, respectively). However, 13/14 patients (90%) in the PB group returned to high impact sports, compared to 9/12 (75%) in the FHL and 6/11 (55%) in the ST groups (Fisher's test, p=0.31 and p=0.056, respectively).

Conclusion: All three techniques produced significant functional improvement, and return to sports was possible in most patients. This study does not demonstrate a clear advantage of one technique over the others.