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Journal of Hand Surgery (British and European Volume)
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Articles

Repairs of Partial Oblique Tendon Injuries: A Biomechanical Evaluation

J. TAN
L. MING
Z.J. JIA
J.B. TANG1

From The Department of Hand Surgery, Hand Surgery Research Center, Affiliated Hospital of Nantong Medical College, Nantong, Jiangsu, China

Correspondence: Prof. Jin Bo Tang, MD., Hand Surgery Research Center, Department of Hand Surgery, Affiliated Hospital of Nantong Medical College, 20 West Temple Road, Nantong 226001, Jiangsu, China. Tel.: +86-513-5052524; Fax: +86-513-5110966; E-mail: hsrc{at}pub.nt.jsinfo.net

This study evaluated the tensile properties of oblique partial tendon lacerations and the effects of peripheral sutures on their strength. Seventy-four fresh pig flexor digitorum profundus tendons were divided into eight groups and were transected across 90% of their diameter. The lacerations in the tendons of five of the groups were at 0°, 15°, 30°, 45°, and 60° to their transverse cross-section, respectively. In the other three groups the lacerations were 0°, 45°, and 60° to the cross-section and were repaired with running peripheral sutures. The tendons were subjected to load-to-failure tests in a tensile testing machine to determine the initial, 1 and 2 mm gap formation forces, and the ultimate strength. Obliquity of tendon lacerations affected the strength of partially lacerated tendons. The tendons with 45° and 60° oblique lacerations had a significantly lower ultimate strengths than those with transverse (0°), or 15° or 30° oblique lacerations. Running peripheral sutures significantly increased both the gap formation forces and the ultimate strength of the tendons with oblique partial lacerations.

Key Words: flexor tendon • partial lacerations • oblique injuries • peripheral sutures • tensile strength

Journal of Hand Surgery (British and European Volume), Vol. 29, No. 4, 381-385 (2004)
DOI: 10.1016/J.JHSB.2004.02.011
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