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In vitro 3D Wear Characterization of Knee Joint Prostheses

  • Maria Cristina Valigi
  • Silvia LogozzoEmail author
  • Saverio Affatato
Conference paper
Part of the Mechanisms and Machine Science book series (Mechan. Machine Science, volume 73)

Abstract

Wear of knee joint prostheses represents a significant clinical problem. Wear characterization of knee inserts is the basis to acquire knowledge on the tribological phenomena during biomechanical contacts and to limit failures or malfunctions due to material loss. In this paper, the wear behavior of fixed total knee prostheses (TKPs) was examined by means of in vitro wear tests performed using a knee joint wear simulator and a 3D optical digitizer. The objective was to characterize the 3D wear distribution on these polyethylene tibial inserts in order to assess their wear resistance and prevent premature revision. The wear characterization and distribution were assessed by using a precise laboratory 3D scanner and a dedicated wear evaluation procedure, recently validated by means of gravimetric tests. Various sets of tibial inserts were worn out and reconstructed by the optical digitizer. The results provided both the wear rates, depths, and the quantification of the contact zone on the surface of total knee prostheses. This study presents an innovative wear assessment method for freeform biomedical prostheses and the results can be used as a basis to validate wear prediction models for human joint prostheses.

Keywords

Wear Characterization 3D Wear Maps Knee Joint 

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Maria Cristina Valigi
    • 1
  • Silvia Logozzo
    • 1
    Email author
  • Saverio Affatato
    • 2
  1. 1.Department of EngineeringUniversity of PerugiaPerugiaItaly
  2. 2.Laboratorio di Tecnologia MedicaIRCCS Istituto Ortopedico RizzoliBolognaItaly

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