Achilles Tendon Reconstruction Using a Hamstring Tendon Autograft for Chronic Rupture of the Achilles Tendon in Patients Over 70 Years of Age: A Retrospective Case Series.

Reconstruction techniques using autologous hamstring tendons were generally applied for chronic Achilles tendon rupture with a large defect size. Previous studies have reported good clinical results of this technique for young or middle-aged patients, however, the clinical outcomes in older patients have been unclear. This retrospective case series reviewed four male patients aged >70 years (mean age, 78.5 years) who underwent Achilles tendon reconstruction using the hamstring tendon autograft for chronic rupture of the Achilles tendon with a large tendon defect. The proximal-distal length between the healthy tendon stumps was measured using sagittal T2-weighted magnetic resonance imaging (MRI). The American Orthopedic Foot and Ankle Society (AOFAS) ankle-hindfoot score and postoperative complications were evaluated. The duration from the traumatic event or appearance of symptoms to surgery was 3.8 (range, 2-6) months. The mean measured gap between the healthy tendon stumps was 67.5 mm on MRI. The AOFAS ankle-hindfoot score improved from 67.3 to 99.5 at the mean follow-up period of 40.3 (range, 23-75) months. No donor site morbidity was observed in all patients. Re-rupture was detected at the five-month follow-up in one patient who had removed a hinged ankle-foot orthosis with adjustable heel wedges without permission. Achilles tendon reconstruction using a hamstring tendon is a viable option for treating selected patients with chronic rupture of the Achilles tendon with a large tendon defect even in older patients. To improve clinical outcomes, a better understanding should be provided to family members as well as older patients regarding the postoperative rehabilitation program.