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ARUP; ISBN: 978-0-9562121-5-3 - CMBBE 2012 - Cardiff University

ARUP; ISBN: 978-0-9562121-5-3 - CMBBE 2012 - Cardiff University

ARUP; ISBN: 978-0-9562121-5-3 - CMBBE 2012 - Cardiff University

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4. RESULTS<br />

The load-deformation behaviour of the two plating systems was seen to be similar.<br />

Osteoporotic bone produced slightly larger motions at the fracture gap than healthy<br />

bone with peak axial displacements of 0.32mm compared with 0.22mm for the LCP at a<br />

load of 1891N. Peak values of axial displacement for the DCP were 0.4mm for<br />

osteoporotic and 0.28mm for healthy bone.<br />

The pattern of minimum (compressive) principal strain around screw holes was found to<br />

be similar for both types of plating (Fig. 1). Due to the screw fastening procedure<br />

compression plating produced larger tensile strains around screw holes (Fig. 2). The<br />

regions of high tensile strain produced by locked plating were found to be smaller and<br />

confined to the side of the screw hole proximal to the load.<br />

Figure 1 - Minimum principal strain around screw hole locations in the LCP. The load is applied<br />

from the right.<br />

Figure 2 - Maximum principal strain around screw hole locations in the DCP. The load is applied<br />

from the right.

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