A comparison of soft-tissue anchors in tendo achilles reattachment

Safety of Achilles Detachment and Reattachment Using a Standard Midline Approach to Insertional Enthesophytes

“…Reattachment at physiologic tension is quite important to prevent contracture and laxity. The Achilles tendon absorbs approximately 900-kg of force during aggressive exercise, and it is imperative to regain that strength postoperatively (10).…”

Button Fixation Technique for Achilles Tendon Reinsertion: A Biomechanical Study

“…Although restricted to a maximum of 10 trials per group, given the high cost of orthopedic material and the difficulty in obtaining cadavers, this was comparable to a similar biomechanical number study by Janis et al (10). One major advantage to our study was that we minimized tissue variability by performing the comparisons of 2 techniques on 2 legs from the same cadaver, which would essentially have had the same intrinsic viscoelastic characteristics.…”

“…The surgical posterior approach and exposure (4 cm proximal and 1 cm distal to the posterosuperior part of the calcaneal tuberosity) to the Achilles tendon was the same for all 3 assemblies. The central point described by Janis et al (10) was used as a reference point to help set the implants using a standard method and attach the tendon to its physiologic position. We measured the largest square that could be formed around the point of insertion of the Achilles tendon.…”

“…In contrast, Achilles tendinopathy is partly caused by repetitive stress, with the maximum load on the Achilles tendon reached at 70% of the stance phase (12). Using the parameters and biomechanical information from 2 previous studies (10,12), we positioned the feet on a platform at an angle 45 to the floor. This angle closely re-created the maximum load applied to the Achilles tendon during walking and used the same angle as in the previous study.…”

“…The recordings were collected at 1000 Hz using LabView 2009 software (National Instruments). The machine was set to produce vertical traction on a vertically aligned tendon and a displacement of 140 mm at a rate of 15 mm/s (10). The values reached just before the beginning of the negative slope and after the greatest peak on the graph showing the maximum load as a function of displacement corresponding to the breaking point were used in our study (Fig.…”