Evaluation of Mechanically-Assisted Crevice Corrosion of Different Modular Dual Mobility Constructs.

ABSTRACT:

Background

Modular dual mobility (MDM) acetabular component use is rising in total hip arthroplasty. However, concern of mechanically assisted crevice corrosion (MACC) at the shell-liner interface remains. We investigated shell-liner corrosion using retrieval analyses and corrosion chamber testing.

Methods

We analyzed fretting and corrosion on 10 matched pairs of 2 commercial MDM constructs (MDM1 and MDM2). Also, pristine pairs of Ti6Al4V shells and CoCrMo liners from 3 commercial dual mobility systems (MDM1, MDM2, and MDM3) were tested in vitro to model MACC performance. Three pairs of each were placed into an electrochemical chamber with stepwise increasing cyclic compression loads while measuring currents generated at the shell-liner taper. Onset fretting loads and fretti

SUBMITTER: Steele JR 

PROVIDER: S-EPMC12375901 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature