The head/stem taper connection is of real concern in contemporary orthopaedics. Material shed from this interface appears to be particularly potent in provoking adverse tissue reactions in the host.
Similar to the bearing surfaces, we use the Legex CMM to scan over the taper surfaces and identify the unworn regions of the components.
From this unworn surface, the original, as manufactured geometry of the cones can be reverse engineered. This idealised geometry is then compared to the actual position of the material following explantation, allowing the amount of material loss to be estimated and plotted using bespoke software.
Taper junction analysis