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Healing of Canine Tendon in Zones Subjected to Different Mechanical Forces

From the Department of Orthopedics, Mayo Clinic and Mayo Foundation, Rochester, Minnesota, USA

Correspondence: Dr Peter C. Amadio, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA.

The effect of external force environment on the healing of a partial thickness injury to canine flexor tendon was studied. A 50% laceration was made in either the fibrocartilaginous (compressive) zone or in the tendinous (tensile) zone of canine flexor digitorum profundus tendons. After three or six weeks, the tendons were harvested. An optical method for determining zone-specific material properties showed that, in response to injury, the structural stiffness decreased in the tensile zone of the tendon but increased in the compressive zone. The mechanical properties and failure mechanism of canine tendon and their changes in response to injury vary according to tendon zone, and differences in the healing process in mechanically specialised zones of the flexor tendon are discussed.

Journal of Hand Surgery (British and European Volume), Vol. 17, No. 5, 561-568 (1992)
DOI: 10.1016/S0266-7681(05)80242-6


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