< Home



< Back

33rd Annual Scientific Meeting proceedings

Stream:   |   Session: Short Communications Orthopaedic + Neuro
Date/Time: 07-07-2023 (16:30 - 16:45)   |   Location: Auditorium Hall
Achilles tendon reinsertion in cats: a comparative study of bone tunnel and Weldix suture anchor
Schuenemann R*1, Groß F2, Haslinger K2, Thurner P2
1Small Animal Hospital Sattledt, Sattledt, Austria, 2Institute of Lightweight Design and Structural Biomechanics, TU Wien, Vienna, Austria.

Cats with Achilles tendon rupture more commonly suffer tendino-osseous avulsions from the tuber calcanei compared to dogs (Voss 2009). Reinsertion of the avulsed tendon to the calcaneus through a bone tunnel was recommended as treatment of choice (Cervi 2010). The goal of this study was a mechanical comparison between classical bone tunnel anchorage and Weldix anchor fixation.

Materials and methods
Seven pairs of gastrocnemius tendon-calcaneus blocks were harvested from cats (death unrelated to study). Gastrocnemius tendons were reinserted to the calcaneus either through a transverse bone tunnel or using a Weldix suture anchor with Prolene 2/0 in a Bunnell-Mayer pattern. Tensile tests were conducted on all samples at a displacement rate of 20 mm/min until failure on a servo-electric load-frame (SELmini-001, Thelkin, Switzerland). Gap formation was tracked with a video camera and results compared with paired t-tests.

Mean loads at a gap of 0.5 and 1 mm respectively were significantly higher for the Weldix anchor (44.2±5.5 N and 51.3±9.3 N) compared to bone tunnel fixation (23.0±15.4 N and 28.6±17.1 N). A 3 mm gap was not reached with the Weldix anchor. Failure loads were not significantly different between the Weldix anchor (55.2±8.0 N) and bone tunnel fixation (65.1±8.3 N). Mode of failure was suture breakage in most cases, pulling through the tendon substance did not occur.

The Weldix suture anchor required higher loads for gap formation compared to a classical bone tunnel and can be considered advantageous for Achilles tendon reinsertion in cats.

Back to the top of the page ^