Comparative biomechanical study of five systems for fixation of the coracoid transfer during the Latarjet procedure for treatment of anterior recurrent shoulder instability

Purpose This work compares the biomechanical resistance of five modes of fixation coracoid bone-block fixation during Latarjet open-air or arthroscopic procedures. The hypothesis is that these systems are equivalent. Methods Latarjet procedures were performed on cadavers, then the samples were subje...

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Bibliographic Details
Published in:International orthopaedics 2020-09, Vol.44 (9), p.1767-1772
Main Authors: Massin, Valentin, Lami, Damien, Ollivier, Matthieu, Pithioux, Martine, Argenson, Jean-Noël
Format: Article
Language:English
Subjects:
Arthroplasty
Biomechanics
Engineering Sciences
Human health and pathology
Humans
Joint Instability - surgery
Life Sciences
Mechanics
Medicine
Medicine & Public Health
Original Paper
Orthopedics
Shoulder
Shoulder Dislocation - surgery
Shoulder Joint - surgery
Surgery
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Summary:Purpose This work compares the biomechanical resistance of five modes of fixation coracoid bone-block fixation during Latarjet open-air or arthroscopic procedures. The hypothesis is that these systems are equivalent. Methods Latarjet procedures were performed on cadavers, then the samples were subjected to an increasing tension until the fixation failed. Five systems were tested: two malleolar screws, one screw with washer, two 3.5-mm self-compressive screws, one 4-mm self-compressive screw associated with one 3-mm self-compressive screw, and endobutton. The main judgment criterion was the strength necessary for the failure of the fixation. The secondary criterion was the stiffness of the assembly. Results The single malleolar screw fixing has a lower breaking threshold than other fixings. There is no difference in strength concerning the other systems. The average strength is greater than the stresses of a shoulder during daily life activities. There is no difference regarding the secondary criterion. Conclusion The use of a single screw is insufficient, but the other systems seems reliable. The use of small diameter self-compressive cannulated screws can provide a better result. This biomechanical work must be validated in clinical studies.
ISSN:0341-2695
1432-5195
DOI:10.1007/s00264-020-04565-2