On the Formation Mechanism of Column Damage Within Modular Taper Junctions.

ABSTRACT:

Background

Column damage is a unique degradation pattern observed in cobalt-chromium-molybdenum (CoCrMo) femoral head taper surfaces that resemble column-like troughs in the proximal-distal direction. We investigate the metallurgical origin of this phenomenon.

Methods

Thirty-two severely damaged CoCrMo femoral head retrievals from 7 different manufacturers were investigated for the presence of column damage and chemical inhomogeneities within the alloy microstructure via metallographic evaluation of samples sectioned off from the femoral heads.

Results

Column damage was found to affect 37.5% of the CoCrMo femoral heads in this study. All the column-damaged femoral heads exhibited chemical inhomogeneities within their microstructures, which comprised of regions enriche

SUBMITTER: Zachariah Z 

PROVIDER: S-EPMC9342686 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature