Abstract
Background
External fixation of tibial fractures using a locking plate has been reported with favorable results in some selected patients. However, the stability of external plate fixation in this fracture pattern has not been previously demonstrated. We investigated the stability of external plate fixation with different plate–bone distances.
Methods
In this study, the computational processing model of external fixation of a distal tibial metaphyseal fracture utilizing the contralateral femoral less invasive stabilization system plate was analyzed. The plate was placed on the anteromedial aspect of tibia with different plate–bone distances: 1, 10, 20, and 30 mm.
Results
Under axial load, the stiffness of construct in all groups was higher than intact tibia. Under axial load with an internal rotational force, the stiffness of construct with 1 and 10 mm plate–bone distances was similar to that of an intact tibia and the stiffness of the construct with 20 and 30 mm distances was lower than that of an intact tibia. Under axial load with an external rotational force, the stiffness of the construct in all groups was lower than that of an intact tibia. The maximum plate stresses were concentrated at the two most distal screws and were highest in the construct with the 10 mm plate–bone distance, and least in the construct with a 1 mm plate–bone distance.
Conclusions
To guarantee a stable external plate fixation in distal tibial fracture, the plate–bone distance should be less than 30 mm.
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All authors of this study disclose that there are no financial and personal relationships with other people or organizations that could inappropriately influence (bias) their work.
Ethical standard
All human studies have been approved by our ethics committee and have therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. The national laws have been observed, too.
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Zhang, J., Ebraheim, N., Li, M. et al. External fixation using locking plate in distal tibial fracture: a finite element analysis. Eur J Orthop Surg Traumatol 25, 1099–1104 (2015). https://doi.org/10.1007/s00590-015-1604-7
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DOI: https://doi.org/10.1007/s00590-015-1604-7