gms | German Medical Science

Deutscher Kongress für Orthopädie und Unfallchirurgie (DKOU 2017)

24.10. - 27.10.2017, Berlin

Contemporary Dual Mobility Cup. A regional and private register: methodology and results

Meeting Abstract

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  • presenting/speaker Jean Louis Prudhon - Clinique des Cèdres, Grenoble , France
  • Andre Ferreira - Clinique du Parc , Lyon, France
  • Jacques Caton - Clinique Emilie de Vialar, Lyon, France
  • Regis Verdier - Groupe Lépine, Genay, France

Deutscher Kongress für Orthopädie und Unfallchirurgie (DKOU 2017). Berlin, 24.-27.10.2017. Düsseldorf: German Medical Science GMS Publishing House; 2017. DocIN28-1412

doi: 10.3205/17dkou071, urn:nbn:de:0183-17dkou0718

Veröffentlicht: 23. Oktober 2017

© 2017 Prudhon et al.
Dieser Artikel ist ein Open-Access-Artikel und steht unter den Lizenzbedingungen der Creative Commons Attribution 4.0 License (Namensnennung). Lizenz-Angaben siehe http://creativecommons.org/licenses/by/4.0/.


Gliederung

Text

Objectives: Dual Mobility Cup (DMC) had been introduced in 1979. Due to lack of referenced publications this interesting and innovating concept remained ignored during close to 20 years.

180 studies (level III or IV) have now been published. Evidence-based medicine is based on of level I studies. The role of national registries grew up since 3 decades to survey orthopaedic implants. In 2012, we developed, registered, implemented a specific database about a contemporary DMC.

Methods: Data are collected with an electronic case report form. We have limited this evaluation to a single product line of a contemporary DMC.

From May 2012 to December 2016, 2090 cases operated on with a Quattro cup have been registered. Among them, results of first 636 primary cases with minimum follow-up of 3 years were reported (series 1). On the 1454 remaining cases, only dislocation rate was monitored (series 2) for this work.

Results and Conclusion: In series1 (553 degenerative diseases, 83 Proximal Femoral Fractures (PFF)), 1 dislocation (1.2%) occurred in PFF, none in degenerative disease. Survivorship (infection excluded) at 3 years was 99.8%. In series 2, 1315 degenerative disease, 139 PFF, dislocation rate was 0.27% (4 cases). In both series we did not observe any intra prosthetic dislocation.

Results of this private regional register confirm high efficiency of DMC to decrease dislocation rate (0.23%). Few outcomes of DMC in primary THA are published in National registries. Swedish Hip Arthroplasty Register reports on 287 primary dual mobility hips out of 78,098 THAs. It doesn't analyse dislocation rate but only revision for instability; none was reported. Authors conclude that DMC decreases dislocation rate. National register from Lithuania also observed a significant decrease of revision for dislocation rate in DMC group.

These "on line" data allow us to monitor DMC in real-time. Weakness is short term follow-up.