Tribocorrosion behavior of CoCrMo alloy for hip prosthesis as a function of loads: a comparison between two testing systems

MT Mathew, MJ Runa, M Laurent, JJ Jacobs, LA Rocha… - Wear, 2011 - Elsevier
Metal-on-metal (MOM) hip prosthesis bearings have enjoyed renewed popularity, but
concerns remain with wear debris and metal ion release causing a negative response in the …

Tribocorrosion response of the Ti6Al4V alloys commonly used in femoral stems

MJ Runa, MT Mathew, LA Rocha - Tribology International, 2013 - Elsevier
In prosthesis, tribochemical reactions occur at the stem/bone interface. When coupled with
micro-motions it can lead to the loosening of the implant, osteolysis, release of metal ion and …

Review of vertebral augmentation: an updated meta-analysis of the effectiveness

D Beall, MP Lorio, BM Yun, MJ Runa… - International Journal of …, 2018 - ijssurgery.com
Runa are employees of Exponent, a scientific and engineering consulting firm. They have
no other disclosures. Kevin Ong reports the following disclosures: employee and shareholder …

Fretting-corrosion behavior in hip implant modular junctions: the influence of friction energy and pH variation

D Royhman, M Patel, MJ Runa, MA Wimmer… - Journal of the …, 2016 - Elsevier
Background Recently, there has been increasing concern in the orthopedic community over
the use of hip implant modular devices due to an increasing number of reports of early failure…

First insight on the impact of an osteoblastic layer on the bio-tribocorrosion performance of Ti6Al4V hip implants

MJ Runa, MT Mathew, MH Fernandes, LA Rocha - Acta biomaterialia, 2015 - Elsevier
In uncemented Ti6Al4V hip implants, the bone–stem interface is subjected to cyclic loading
motion driven by the daily activities of the patients, which may lead to the complete failure of …

Fretting-corrosion in hip implant modular junctions: New experimental set-up and initial outcome

D Royhman, M Patel, MJ Runa, JJ Jacobs… - Tribology …, 2015 - Elsevier
Modern hip prostheses feature a modular implant design with at least one tapered junction.
This design can lead to several complications due to the introduction of additional interfaces, …

Design, development, and testing of a compact tribocorrosion apparatus for biomedical applications

A Butt, NB Lucchiari, D Royhman, MJ Runa… - Journal of Bio-and Tribo …, 2015 - Springer
Runa et al. reported a wear loss of 13.6 ± 3.25 µg for tribocorrosion using an alumina ball
of … Due to similar contact area, wear scar length, and load, Runa et al. had similar results to …

Corrosion and tribocorrosion behavior of CoCrMo alloys used as hip joint implant materials under simulated body fluids: Effect of proteins and normal load

MJ Runa, LA Rocha, MT Mathew - 1st Portuguese Biomedical …, 2011 - ieeexplore.ieee.org
The release of metal ions and wear debris are raising serious concerns on metal-on-metal (MoM)
hip prosthesis. The purpose of this work was to evaluate the corrosion and …

Tribocorrosion in hip modular taper junctions: Load-triggered transitions in electrochemical and mechanical behavior

…, M Patel, D Royhman, MJ Runa… - … and Tapers in …, 2015 - asmedigitalcollection.asme.org
Modular hip junctions operate in a challenging environment. This includes exposure to
cyclic loads, micromotions at the interfaces, and a shifting local chemical environment. The …

Evaluation of Corrosion Mechanisms at the Bone-Metal Interface of Hip Implants

MJ Runa, MT Mathew, LA Rocha - … Society Meeting Abstracts …, 2015 - iopscience.iop.org
Total hip replacements (THR) are considered to be a successful surgical intervention in
orthopedic community. In a hip joint environment, the orthopedic metal implants are exposed to a …