Correlation of corrosion and biomechanics in the retrieval of a single modular neck total hip arthroplasty design: modular neck total hip arthroplasty system

Authors

Brent A. Lanting, London Health Sciences Centre
Matthew G. Teeter, London Health Sciences Centre
Edward M. Vasarhelyi, London Health Sciences Centre
Todor G. Ivanov, Robarts Research Institute
James L. Howard, London Health Sciences Centre
Douglas D.R. Naudie, London Health Sciences Centre

Document Type

Article

Publication Date

1-1-2015

Journal

Journal of Arthroplasty

Volume

30

Issue

1

First Page

135

Last Page

140

URL with Digital Object Identifier

10.1016/j.arth.2014.06.009

Abstract

© 2014 Elsevier Inc. Increased modularity of total hip arthroplasty components has occurred, with theoretical advantages and disadvantages. Recent literature indicates the potential for elevated revision rates of modular neck systems and the potential for local pseudotumor and metallosis formation at the modular neck/stem site. Retrieval analysis of one modular neck implant design including SEM (SCANNING ELECTRON MICROSCOPY) assessment was done and correlated with FEA (finite element analysis) as well as clinical features of patient demographics, implant and laboratory analysis. Correlation of the consistent corrosion locations to FEA indicates that the material and design features of this system may result in a biomechanical reason for failure. The stem aspect of the modular neck/stem junction may be at particular risk.