Acta Mechanica Slovaca 2013, 17(3):12-17 | DOI: 10.21496/ams.2013.027

Biomechanical Analysis of Bone Healing at One-Plate and Double-Plate Fixation of Femoral Bone Fractures

Jarosław Sidun

Bialystok Technical University, Mechanical Faculty, Wiejska 45c, 15-351 Bialystok

The present paper present describes so-far unsolved issues of the biomechanics of the bone - plate stabiliser system functioning in a multi-plane system. The few available publications treat this question selectively and often generally. There are no reports which would provide data on the influence of the geometry of a Polfix type plate stabiliser system on the speed of the long bones synostosis process. Clinical practice shows that using an improperly selected fixation system and inappropriate biomechanical stabilisation conditions leads to an inappropriate course of the synostosis process. On the basis of distortion vector maps, the location of the system's rotation centre was determined. In the case of a one-plate fixation, its smaller rigidity and thus greater displacement in the fracture crack, makes it possible for rotation and lateral displacement to occur. This leads to shearing of the newly forming bone tissue. In the case of a two-plate fixation, the system's rotation centre is located in the fracture crack. This is the area where approximation of bone fractures takes place. The distribution scheme of the distortion vectors on the surface of the model shows that the system's rotation centre is located in the fracture crack, and axial approximation of the fixed fragments occurs in this area. Movements of such a type in the fracture crack stimulate callus formation.

Published: October 31, 2013  Show citation