Insertion of the calcaneus tendon [Inserción del tendón calcáneo]
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del Sol M.
In man the calaneous tendon (CT) is the most voluminous and resistent tendon in the body; its insertion is a vital element of the foot joint mechanism as well as in a number of disorders that affect talocrural and calcaneal regions. For the present study 120 lower members (60 right and 60 left) of formolized cadavers, adult subjects of both sexes were used. Posterior surface of the leg was disected from the joint line of the knee to the lower part of the calcaneal removing precalcaneus adipose tissue, exposing the CT. We observed that in 62 cases (51.67%) the CT was formed exclusively by fusion of aponeurosis of the gastrocnemius and soleus muscles. In 38 cases (31.67%) tendon of the plantar muscle contributes to the partial formation of the CT, and fully integrated in 20 cases (16.66%). Width of the CT at the soleus muscle belly end, was 12.88 mm ± 2.0 in men and 11.55 mm ± 1.6 women and density at the same level was 4.29 mm ± 0.64 in men and 4.36 mm ± 0.64 in women. Width of the CT at the posterosuperior border of the calcaneal was 17.98 mm ± 17 in men, and 17.06 mm ± 1.53 in women. CT density at the same level was 3.79 mm ± 0.61 in men and 3.93 mm ± 0.67 in women. Distance between posterosuperior border of the calcaneal and starting point of the inserted portion of the CT was 10.99 mm ± 2.11 in men and 10.84 ± 2.71 in women. Length of the inserted portion of the CT was 17.78 mm ± 2.4 in men and 17.66 mm ± 4.75 in women. Width of the CT at the insertion level in the calcaneus bone was 28.77 mm ± 2.53 in men and 27.21 mm ± 2.93 in women. Insertional CT tendinopathy is a chronic condition in some cases requiring surgical debridement of the tendon. Therefore, knowledge of morphological aspects of the CT and its insertion is important at the time of surgical procedures of the talocrural region.
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