Biomechanical model of distal articular humeral fractures-influence of bone density on the fracture threshold.

Autor: Marcoin A; CHU Maison Blanche, 45 Rue Cognacq Jay, 51092, Reims, France., Eichler D; CHU Strasbourg, Strasbourg, France., Kempf JF; Shoulder and Elbow Department, CCOM-CHU Strasbourg, 10 avenue Achille Baumann, 67400, Illkirch-Graffenstaden, France., Clavert P; Laboratoire iCube-GEBOAS, CNRS UMR 7357, Equipe 12 Matériaux Multi-échelles et Biomécanique, Institut d'Anatomie Normale, Faculté de médecine, 67085, Strasbourg, France. philippe.clavert@chru-strasbourg.fr.
Jazyk: angličtina
Zdroj: International orthopaedics [Int Orthop] 2020 Jul; Vol. 44 (7), pp. 1385-1389. Date of Electronic Publication: 2020 May 30.
DOI: 10.1007/s00264-020-04624-8
Abstrakt: Introduction: Working hypothesis: The distal humeral bone density influences supracondylar fracture threshold. The aim of this study was first to develop a reproducible model of intra-articular distal humeral fractures and second to establish a relationship between bone mineral density (BMD) and the fracture threshold of the humerus.
Materials and Methods: An original model of the fracture was developed using ten sawbones. After obtaining a reproducible and clinically relevant fracture model, we tested 21 cadaveric distal humeri for which the BMD was known with a stainless-steel custom-made proximal ulna jig. Fractures were created using a servo hydraulic-testing machine in axial compression to simulate a fall onto an outstretched hand. Fracture lines, load to failure, and rigidity of the bone were recorded based on the stress-strain curves.
Results: The fracture generation was reliable, reproducible, and clinically relevant (type B2). A significant correlation between the BMD and the fracture threshold was found. Mean threshold was 901.86 N/m 2 . Mean distal humerus BMD was 0.9097 g/cm 2 (r = 0.7321).
Conclusions: We developed a reproducible articular fracture of the distal humerus model and found a correlation between the fracture threshold and bone mineral density.
Databáze: MEDLINE
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