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Erschienen in: Knee Surgery, Sports Traumatology, Arthroscopy 5/2017

14.08.2015 | Knee

Converting round tendons to flat tendon constructs: Does the preparation process have an influence on the structural properties?

verfasst von: C. Domnick, M. Herbort, M. J. Raschke, B. Schliemann, R. Siebold, R. Śmigielski, C. Fink

Erschienen in: Knee Surgery, Sports Traumatology, Arthroscopy | Ausgabe 5/2017

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Abstract

Purpose

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).

Methods

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.

Results

No statistically significant differences (n.s.) regarding stiffness, yield load and maximum load between natively round and processed flat tendons could be detected.

Conclusion

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.
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Metadaten
Titel
Converting round tendons to flat tendon constructs: Does the preparation process have an influence on the structural properties?
verfasst von
C. Domnick
M. Herbort
M. J. Raschke
B. Schliemann
R. Siebold
R. Śmigielski
C. Fink
Publikationsdatum
14.08.2015
Verlag
Springer Berlin Heidelberg
Erschienen in
Knee Surgery, Sports Traumatology, Arthroscopy / Ausgabe 5/2017
Print ISSN: 0942-2056
Elektronische ISSN: 1433-7347
DOI
https://doi.org/10.1007/s00167-015-3749-7

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