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- Title
Converting round tendons to flat tendon constructs: Does the preparation process have an influence on the structural properties?
- Authors
Domnick, C.; Herbort, M.; Raschke, M.; Schliemann, B.; Siebold, R.; Śmigielski, R.; Fink, C.; Raschke, M J
- Abstract
<bold>Purpose: </bold>The structural properties of hamstring tendon grafts were evaluated in a porcine model, after processing it to a flat shape, to better replace or augment anatomic flat structures (e.g. ACL, MPFL or MCL).<bold>Methods: </bold>In this biomechanical study, porcine flexor tendons were used which have a comparable shape to semitendinosus and gracilis tendons. One part of the tendon was prepared to a flat tendon construct by splitting the tendon longitudinally with a knife to half of the diameter of the tendon. The semi-split tendon was scratched out to a flat shape. The other matched part was tested in its original round shape. The tendons (n = 40) have been fixed in a uniaxial testing machine (Zwick/Roell) by cryo-clamps after preparing the fixed ends by 2-0 polyester sutures (2-0 Ethibond® EXCEL, Ethicon, Somerville, NJ). In every specimen, there was a free 60-mm tendon part between both clamps. The tendons have been loaded to failure to evaluate typical biomechanical parameters such as stiffness, yield load and maximum load.<bold>Results: </bold>No statistically significant differences (n.s.) regarding stiffness, yield load and maximum load between natively round and processed flat tendons could be detected.<bold>Conclusion: </bold>A prepared flat-shaped tendon does not show any different structural properties compared with an original round tendon. Therefore, a flat tendon seems to be a biomechanical stable graft option for anatomic reconstruction or augmentation of injured natively flat-shaped structures such as MCL, MPFL or ACL.
- Subjects
TENDON transplantation; ANTERIOR cruciate ligament; FLEXOR tendons; BIOMECHANICS; MULTIVARIATE analysis; HAMSTRING muscle; ANTERIOR cruciate ligament surgery; TENDON physiology; ANIMALS; ARTHROPLASTY; DEAD; KINEMATICS; POLYESTERS; SUTURES; SWINE; WEIGHT-bearing (Orthopedics)
- Publication
Knee Surgery, Sports Traumatology, Arthroscopy, 2017, Vol 25, Issue 5, p1561
- ISSN
0942-2056
- Publication type
journal article
- DOI
10.1007/s00167-015-3749-7