Intraprosthetic dislocation of dual mobility total hip arthroplasty: still occurring?

International Orthopaedics
Thomas NeriF Farizon

Abstract

The objective was to identify predictive factors for intraprosthetic dislocation (IPD) and to understand how improvements in dual mobility cups (DMC) have helped to reduce dramatically the occurrence of this complication. DM mobile inserts retrieved from 93 hips were divided into three groups: first-generation DMC with IPD ("firstDMC-IPD"), first-generation DMC with over 15 years of implantation without IPD ("firstDMC-noIPD"), and latest-generation DMC ("newDMC"). The predictive factors for IPD based on clinical, prosthetic, radiological and intraoperative characteristics were analysed by multivariate analysis. The surface of each retrieved mobile insert was analysed using three-dimensional CT scan in order to compare their rim wear. Three predictive factors for IPD were found: a high BMI, a wide rough stem neck and a large cup size. Wear of the firstDMC-noIPD inserts was significantly less than those of firstDMC-IPD inserts and significantly more than those of newDMC inserts. For the firstDMC-IPD inserts, the rim's outer surface wear was significantly greater than the rim's inner surface wear. IPD is a specific complication related to wear of the DM mobile insert due to failure of the liner's retaining rim, especially from the...Continue Reading

References

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Citations

Dec 4, 2019·Clinical Orthopaedics and Related Research·Julien WegrzynJacques Béjui-Hugues
Jun 20, 2020·SICOT-J·Thomas NeriFrederic Farizon
May 14, 2020·The Journal of Hand Surgery, European Volume·Lene DremstrupMaiken Stilling
Feb 8, 2021·The Journal of Arthroplasty·Gwo-Chin LeeP Maxwell Courtney
Sep 10, 2021·Zeitschrift für Orthopädie und Unfallchirurgie·Petri BellovaKlaus-Peter Günther
Jun 22, 2021·Artificial Organs·Emanuela CastielloSaverio Affatato

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