[Achilles tendon plasty in inveterate lesions. Pérez Teuffer modified technique]

The purpose of this paper is to convey our experience with the technique used to treat chronic Achilles tendon lesions at ISSSTE "1 de Octubre" Regional Hospital. A prospective study with descriptive longitudinal follow-up was conducted in 30 patients with Achilles tendon rupture that occurred more than 10 days earlier. They were treated with the modified Perez-Teuffer technique at the Orthopedics and Trauma Service from March 2004 to March 2008. Plasty with transposition of the lateral peroneus brevis to the tendon stump was performed. The right side was affected in 70% of patients, mean age was 31.1 years, and males were predominant and accounted for 90%. Time elapsed since the lesion was 10-62 days with a mean of 26 days. We obtained excellent results in 90%, and good results in 10% of patients. One case had skin necrosis and limited mobility and two had pain. They were not considered as poor results as this did not interfere with the final functional results.