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Materials 2017, 10(4), 364; doi:10.3390/ma10040364

Wear Distribution Detection of Knee Joint Prostheses by Means of 3D Optical Scanners

1
Medical Technology Laboratory, Rizzoli Orthopaedic Institute, 40136 Bologna, Italy
2
Department of Engineering, University of Perugia, 06125 Perugia, Italy
3
Department of Research, V-GER S.r.l., Via Mori 6, Prunaro di Budrio,40121 Bologna, Italy
*
Author to whom correspondence should be addressed.
Received: 16 February 2017 / Revised: 21 March 2017 / Accepted: 29 March 2017 / Published: 30 March 2017
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Abstract

The objective of this study was to examine total knee polyethylene inserts from in vitro simulation to evaluate and display—using a 3D optical scanner—wear patterns and wear rates of inserts exposed to wear by means of simulators. Various sets of tibial inserts have been reconstructed by using optical scanners. With this in mind, the wear behavior of fixed and mobile bearing polyethylene knee configurations was investigated using a knee wear joint simulator. After the completion of the wear test, the polyethylene menisci were analyzed by an innovative 3D optical scanners in order to evaluate the 3D wear distribution on the prosthesis surface. This study implemented a new procedure for evaluating polyethylene bearings of joint prostheses obtained after in vitro wear tests and the proposed new approach allowed quantification of the contact zone on the geometry of total knee prostheses. The results of the present study showed that mobile TKPs (total knee prosthesis) have lower wear resistance with respect to fixed TKPs. View Full-Text
Keywords: 3D wear map; knee joint; prostheses design; 3D scanners; wear inspection 3D wear map; knee joint; prostheses design; 3D scanners; wear inspection
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Affatato, S.; Valigi, M.C.; Logozzo, S. Wear Distribution Detection of Knee Joint Prostheses by Means of 3D Optical Scanners. Materials 2017, 10, 364.

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