Mechanical properties of the flexor digitorum profundus tendon attachment.

Autor: Felder JJ; Department of Orthopaedic Surgery, Akron General Medical Center, Akron, OH USA., Guseila LM; Department of Orthopaedic Surgery, Akron General Medical Center, Akron, OH USA., Saranathan A; Department of Orthopaedic Surgery, Akron General Medical Center, Akron, OH USA., Shary TJ; Department of Orthopaedic Surgery, Akron General Medical Center, Akron, OH USA., Lippitt SB; Department of Orthopaedic Surgery, Akron General Medical Center, Akron, OH USA., Elias JJ; Department of Orthopaedic Surgery, Akron General Medical Center, Akron, OH USA ; Calhoun Research Laboratory, Akron General Medical Center, 400 Wabash Avenue, Akron, OH 44307 USA.
Jazyk: angličtina
Zdroj: Journal of hand and microsurgery [J Hand Microsurg] 2013 Dec; Vol. 5 (2), pp. 54-7. Date of Electronic Publication: 2013 Jun 02.
DOI: 10.1007/s12593-013-0097-z
Abstrakt: The current study was performed to determine the strength and rigidity of the intact flexor digitorum profundus (FDP) tendon attachment and compare the rigidity at the attachment site to the rigidity within a more proximal part of the tendon. Eight cadaveric index fingers were tested to failure of the FDP tendon. Lines were drawn on each tendon with India ink stain at the position of the attachment to bone and 5 mm and 10 mm proximally. Each test was recorded using a high resolution video camera. A minimum of six images per test were used for analysis of tissue deformation. The centroid of each line was computationally identified to characterize the deformation of the tendon between the lines. Force vs. deformation curves were generated for the 5 mm region representing the tendon attachment and the 5 mm region adjacent to the attachment. Stiffness measurements were generated for each curve, and normalized by the initial length to determine the rigidity. The failure strength ranged from 263 N to 548 N, with rigidity values ranging from 2201 N/(mm/mm) to 8714 N/(mm/mm) and from 3459 N/(mm/mm) to 6414 N/(mm/mm) for the attachment and the tendon proximal to the attachment, respectively. The rigidity did not vary significantly between the attachment and proximal tendon based on a Wilcoxon signed rank test (p = 0.2). The measured strength and rigidity establish biomechanical properties for the FDP tendon attachment to bone.
Databáze: MEDLINE
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