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- Title
Biomechanics of a new technique for minimal-invasive coracoclavicular ligament reconstruction.
- Authors
Schliemann, Benedikt; Lenschow, Simon; Schürmann, Peter; Schroeglmann, Mike; Herbort, Mirco; Kösters, Clemens; Raschke, Michael
- Abstract
Purpose: To evaluate the biomechanical properties of a new coracoclavicular (CC) ligament reconstruction using a subcoracoidal flip button and a tendon graft compared to an augmented tendon loop and a synthetic coracoclavicular ligament reconstruction. Methods: A porcine metatarsalia model was used to assess supero-inferior fixation strength of (1) a new technique using an augmented tendon graft and a subcoracoidal flip button in a lifting block fashion, (2) an augmented tendon loop around the coracoid base and (3) a synthetic coracoclavicular ligament augmentation technique. Cyclic loading from 20 to 70 N for 1,000 cycles was performed, followed by a load-to-failure protocol. Results: All specimens of the three different groups survived the cyclic loading protocol. The maximum loads to failure under superior loading conditions were 760 ± 78 N for group 1, 702 ± 48 N for group 2 and 1117 ± 91 N for group 3. The synthetic coracoclavicular ligament augmentation technique revealed significantly higher maximum loads compared to the other groups ( p < 0.001). The augmented tendon graft/flip button construct had higher maximum loads than the augmented tendon loop (n.s.). No significant differences were found for stiffness and elongation behaviour among the 3 tested groups. Conclusion: The results suggest that the described technique is an alternative option to reconstruct the CC ligaments in AC joint instability in a minimal-invasive technique. Under superior loading conditions, the biomechanical properties exhibited by this novel technique were comparable to those of the tendon loop around the coracoid base.
- Subjects
BIOMECHANICS; ACROMIOCLAVICULAR joint; LIGAMENTS; BONE grafting; BONE surgery
- Publication
Knee Surgery, Sports Traumatology, Arthroscopy, 2013, Vol 21, Issue 5, p1176
- ISSN
0942-2056
- Publication type
Article
- DOI
10.1007/s00167-012-2041-3