A biomechanical comparison of unilateral and bilateral String-of-Pearls™ locking plates in a canine distal humeral metaphyseal gap model
| Autor: | S. H. Elder, R. J. Hurt, Ron McLaughlin, Jason A. Syrcle |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
medicine.medical_specialty
medicine.medical_treatment Locking plate 03 medical and health sciences Dogs 0302 clinical medicine Axial compression Forelimb Materials Testing Cadaver Foramen medicine Elbow joints Animals Humerus Ostectomy Orthodontics 030222 orthopedics General Veterinary business.industry Torsion (mechanics) 030229 sport sciences Biomechanical Phenomena Surgery medicine.anatomical_structure Animal Science and Zoology Cadaveric spasm business Bone Plates |
| Zdroj: | Veterinary and Comparative Orthopaedics and Traumatology. 27:186-191 |
| ISSN: | 2567-6911 0932-0814 |
| DOI: | 10.3415/vcot-13-10-0133 |
| Popis: | SummaryObjective: To compare the in vitro biomechanical performance of two String-of-Pearls (SOP) plate constructs in a canine distal humeral metaphyseal gap model.Methods: Seven pairs of canine cadaveric humeri, including the elbow joints, were prepared. One group consisted of a unilateral medially placed SOP plate with bicortical screws (UNI). The second group consisted of bilateral caudo-medial and caudo-lateral SOP plates applied with monocortical screws (BI). A 2 cm ostectomy was performed immediately proximal to the supratrochlear foramen. Constructs were tested in torsion and axial compression.Results: The UNI constructs had significantly lower stiffness in torsion and axial compression than the BI group. However, UNI constructs had a significantly higher ultimate strength than BI constructs. All UNI constructs failed by bending of the transcondylar screw and SOP plate. All BI constructs failed by axial pullout of the distal most screws.Clinical significance: In stabilizing canine supracondylar humeral fractures as modeled here, both the UNI model and the BI model demonstrated biomechanical advantages. The incorporation of a transcondylar screw through the medial plate appears to be beneficial to construct strength. |
| Databáze: | OpenAIRE |
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