Why fine-wire fixators work: An analysis of pressure distribution at the wire–bone interface

The experimental model showing the threaded wire and strain gauge load cell. The pressure film can be seen between the two bone blocks.

An example of the developed pressure film.

Three-dimensional pressure map showing path of wire (black line). At a distance of 0.5mm from the wire, there is a polar distribution of pressure towards the entry and exit points of the wire.

Pressure map showing beam loading effect at a distance of 2.5mm from the wire (path of wire represented by black line).

Pressure map showing uniform pressure at a depth of 5.0mm (path of wire represented by black line)

Half-pin experiment. Pressure map showing concentration of pressure toward the entry side of the pin (black line) at a depth of 3.0mm. Peak pressures of 20–25MPa are observed.