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Journal of Long-Term Effects of Medical Implants
SJR: 0.332 SNIP: 0.491 CiteScore™: 0.89

ISSN Print: 1050-6934
ISSN Online: 1940-4379

Journal of Long-Term Effects of Medical Implants

DOI: 10.1615/JLongTermEffMedImplants.v13.i4.50
6 pages

Bioabsorbable Screw Fixation in Coracoclavicular Ligament Reconstruction

Timothy W. Talbert
Department of Orthopaedic Surgery, Louisiana State University Health Science Center, Shreveport, Louisiana, USA
John R. Green, III
Department of Orthopaedic Surgery, University of Washington, Seattle, Washington, USA
Debi P. Mukherjee
LSU Health Sciences Center- Shreveport
Alan L. Ogden
Department of Orthopaedic Surgery, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA 71130
R. H. Mayeux
Department of Orthopaedic Surgery, Louisiana State University Medical Center, 1501 Kings Highway, Shreveport, LA 71130

ABSTRACT

The purpose of this study is to evaluate the biomechanical properties of stainless steel and bioabsorbable screw fixation of the clavicle to the base of the coracoid. Seven matched pairs of fresh frozen shoulders were prepared by removing all soft tissue except the acromioclavicular and coracoclavicular ligament complexes. The shoulders were randomly selected and fixed with 4.5-mm stainless steel (SS) screws, while contralateral shoulders were fixed with 4.5-mm poly L-lactic acid polymer (PLLA) screws. Pullout strength, stiffness, and elongation to failure were measured using an Instron Mechanical Tester (Model 4202). The average pullout strength of 720.6 ± 244.9 N of the metal screws was not statistically different (p = 0.089) from that of the biodegradable screws of 580.4 ± 188.6 N. The pullout strengths exerted by both these screws exceeded the reported strength (500 N) of the intact coracoclavicular complex indicating adequate initial pullout strength for coracoclavicular fixation.