TY - JOUR
AR - JSCR-2020-3-107
TI - Unusual Case of Acetabular Liner Dissociation Following Failure of Ceramic-OnCeramic Bearing Total Hip Arthroplasty: A Case Report
AU - Michael , Foxall-Smith
AU - Richard , Donovan
AU - Stephen , Eastaugh-Waring
AU - Mehool, Acharya
JO - Surgery Case Reports
PY - 2020
DA - Mon 29, Jun 2020
SN - 2733-225X
DO - http://dx.doi.org/10.31487/j.JSCR.2020.03.07
UR - https://www.sciencerepository.org/unusual-case-of-acetabular-liner-dissociation-following-failure-of-ceramic_JSCR-2020-3-107 
KW - Ceramic liner, dislocation, migration, computed tomography
AB - Modular hip implants can improve construct stability and the rate of volumetric wear in Total Hip
Arthroplasty (THA), however, there is still a 0.2-10% risk of dislocation. We report the unusual case of a
54-year-old lady who presented with a dislocated migrated ceramic liner following a twisting injury. She
had undergone a ceramic-on-ceramic THA five years earlier. This diagnosis of the dislocated liner was
confirmed with computed tomography (CT) scanning. Review of National Joint Registry data showed
ceramic-on-ceramic acetabular liner dissociation to be rarer than in those with metal-on-polyethylene
(incidence 0.27 vs. 0.46 per 1000 prosthesis years). We suggest the liner may have migrated in retrograde
along the iliopsoas. We recommend the use of cross-sectional imaging (CT) to assist in confirming the
diagnosis and planning future surgery.