Sensor for measurement of wear in total hip arthroplasty

Abstract

This article treats of measurements of the total deformation of polyethylen cotyles ABG I of coxa by means of the optical topography method. The total deformation is considered as a combination of the plastic deformation and the real diminution of the artificial cotyle material due to usage of a hip replacement. We use 3D scanning topography to measure surface geometry of cotyle. The sensor consists of optical source, digital camera, rotating stage and linear stage. We use LabView to control the measurement and Matlab to compute the result. We want to measure the set of more then 200 cotyle samples. © 2008 Springer-Verlag.