RESUMEN
BACKGROUND: Angle-stable locking plates have improved the surgical management of fractures. However, locking implants are costly and removal can be difficult. The aim of this in vitro study was to evaluate the biomechanical performance of a newly proposed crossed-screw concept ("Fence") utilizing conventional (non-locked) implants in comparison to conventional LC-DCP (limited contact dynamic compression plate) and LCP (locking compression plate) stabilization, in a human cadaveric diaphyseal gap model. METHODS: In eight pairs of human cadaveric femora, one femur per pair was randomly assigned to receive a Fence construct with either elevated or non-elevated plate, while the contralateral femur received either an LCP or LC-DCP instrumentation. Fracture gap motion and fatigue performance under cyclic loading was evaluated successively in axial compression and in torsion. Results were statistically compared in a pairwise setting. RESULTS: The elevated Fence constructs allowed significantly higher gap motion compared to the LCP instrumentations (axial compression: p Asunto(s)
Placas Óseas/tendencias
, Tornillos Óseos/tendencias
, Diseño de Equipo/métodos
, Fijación de Fractura/instrumentación
, Fracturas Óseas/cirugía
, Anciano
, Anciano de 80 o más Años
, Fenómenos Biomecánicos
, Placas Óseas/normas
, Tornillos Óseos/normas
, Cadáver
, Fuerza Compresiva/fisiología
, Diáfisis/anatomía & histología
, Diáfisis/fisiología
, Diáfisis/cirugía
, Falla de Equipo
, Análisis de Falla de Equipo/métodos
, Femenino
, Fémur/anatomía & histología
, Fémur/fisiología
, Fémur/cirugía
, Fijación de Fractura/métodos
, Humanos
, Masculino
, Persona de Mediana Edad
, Estrés Mecánico
, Soporte de Peso/fisiología