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Journal of Hand Surgery (British and European Volume)
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Articles

Dorsal-Enhanced Sutures Improve Tension Resistance of Tendon Repair

Y. CAO
R. G. XIE
J. B. TANG

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

Correspondence: Professor Jin Bo Tang, Hand Surgery Research Center, Affiliated Hospital of Nantong, 20 West Temple Road, Nantong 226001, Jiangsu, China. E-mail: hsrc{at}pub.nt.jsinfo.net

Thirty-six fresh pig flexor tendons were repaired using either the modified Kessler method or the Tang method. Nine tendons from each group were tested in an Instron tensile testing machine with the tendons passing 90° around a pulley. The other nine tendons from each group were pulled linearly by the testing machine. The 2mm gap formation force of the tendons repaired with the modified Kessler and Tang methods and pulled at 90° were 64%±5% and 79%±9% respectively of those forces recorded during linear testing. The ultimate strengths of tendons repaired by the modified Kessler and Tang methods and pulled at 90° were 76%±6% and 81%±8% respectively of the forces measured during linear testing. The percentage gap formation and ultimate strength of the Tang method was significantly higher than that of the modified Kessler suture when the tendons were pulled around a pulley. This demonstrates that the Tang suture, with its main components in the dorsal part of the repaired tendon, has greater tension resistance capacity than conventional tendon sutures which are placed in the middle of the tendon. This study suggests that dorsally-enhanced multiple tendon sutures are better placed to sustain the tension generated during active finger flexion.

Journal of Hand Surgery (British and European Volume), Vol. 27, No. 2, 161-164 (2002)
DOI: 10.1054/JHSB.2001.0687
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