Core Suture Purchase Affects Strength of Tendon Repairs

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Jin Bo Tang

2005

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  • Fifty-eight tendons were divided into 4 groups and repaired with a 2-strand grasping repair technique with the core suture purchase in the tendon stump ranging from 0.4 to 1.2 cm
  • Sixteen tendons were repaired with a 4-strand circle-locking tendon-suture repair technique
  • The tendons were subjected to a linear, noncyclic, load-to-failure test in a tensile testing machine
  • The forces measured for initial gap formation, 2-mm gap formation, and ultimate strength were recorded for each repair
  • The strength of 4-strand circle-locking repairs with a suture purchase of 1.0 cm was statistically greater than that of the repairs with a suture purchase of 0.4 cm. For both the 2-strand grasping and 4-strand circle-locking repair methods, the length of core suture purchase significantly influences the resistance to 2-mm gap formation and the ultimate strength of repairs in transversely lacerated flexor tendons
  • Core suture purchase length of 0.4 cm or less results in significantly weaker repairs

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