Flexor hallucis longus transfer for chronic Achilles tendonosis.

A technique similar to the one described by Hansen for reconstruction of chronic Achilles tendinosis using the flexor hallucis longus (FHL) tendon was used in 26 patients (29 tendons). Follow-up on all 26 patients (mean age 51.3 years) is provided with an average follow-up 35 months (range, 12 to 58 months). All patients were evaluated postoperatively to assess pain, function, and alignment of the ankle and hindfoot. The AOFAS Foot Ratios for the ankle and hindfoot (total of 100 points) was used. Time to maximum improvement was 8.2 months (range, three to 20 months). Ankle-Hindfoot Scale ratings improved from 41.7 (range, 23 to 63) preoperatively to 90.1 (range, 49 to 100) postoperatively. All but three patients evaluated their result as good or excellent in regards to improved function and pain. No patient had a significant functional deficit or deformity of the hallux after transfer of the FHL tendon.