Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/47353
Título: Use of screw locking elements improves radiological and biomechanical results of femoral osteotomies
Autores/as: Garcés Martín, Gerardo 
Rodríguez Lozano, David Oliverio 
Rodríguez Grau-Bassas, Enrique 
Roiz Martín, Syra
Yánez Santana, Manuel Alejandro 
Cuadrado Hernández, Alberto Javier 
Clasificación UNESCO: 321310 Cirugía ortopédica
310910 Cirugía
Palabras clave: Distal Humerus Fractures
Far Cortical Locking
Fixation
Plate
Stiffness, et al.
Fecha de publicación: 2014
Proyectos: Uso de Tornillos Bloqueados Con Tuercas de Peek Para Acelerar la Consolidación de Las Fracturas. 
Publicación seriada: BMC Musculoskeletal Disorders 
Resumen: Background: Dynamic compression plate (DCP) constructs provide inadequate fixation in cases of poor bone quality and early weight-bearing. Screw locking elements (SLE) are flat locking nuts placed at the end of the screw to prevent screw stripping from the bone, improving fixation stability. The purpose of this work was to compare biomechanical and radiological evaluations of femoral ovine osteotomies fixed using DCP constructs with and without SLE.Method: A dyaphyseal femoral osteotomy was performed in sixteen adult sheep and fixed with a DCP and cortical screws. Half of the animals were operated on with a SLE on each side of the osteotomy and the rest without the addition of SLE. Four animals of each group were euthanized after 8 weeks, and the remaining after 16 weeks. Both femora of each animal were radiographed and mechanically tested in torsion.Results: Radiologically femoral malalignment or screw loosening was observed in six out of the eight animals operated on without SLE. In contrast, all animals subjected to the operation with SLE showed complete radiological consolidation of the osteotomy. Seven of these eight animals showed normal femoral alignment and no osteosynthesis failure. Stiffness of the bones fixed with SLE was among 145% and 177% the value of their contralateral non-operated femurs (all animals of this group showed greater stiffness on the operated bone than its contralateral non-operated femur). However, stiffness of the bones operated on without SLE was among 58% and 87% the value of the stiffness of their contralateral non-operated bone (all animals of this group showed greater stiffness on the non-operated bone than the osteotomized ones).Conclusions: Use of SLE avoided loosening of the system and stimulated stronger osteotomy consolidation. Clinical application of this improved system may thus be a feasible and cost-effective alternative to other more rigid and expensive bone fixation techniques.
URI: http://hdl.handle.net/10553/47353
ISSN: 1471-2474
DOI: 10.1186/1471-2474-15-387
Fuente: BMC Musculoskeletal Disorders [ISSN 1471-2474], v. 15 (1), 387
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