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Erschienen in: International Orthopaedics 5/2018

19.09.2017 | Original Paper

Salvage of a monoblock metal-on-metal cup using a dual mobility liner: a two-year MRI follow-up study

verfasst von: Maximilian F. Kasparek, Lisa Renner, Martin Faschingbauer, Wenzel Waldstein, Kilian Rueckl, Friedrich Boettner

Erschienen in: International Orthopaedics | Ausgabe 5/2018

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Abstract

Purpose

Revision of failed modular metal-on-metal total hip replacement (MoM-THA) can be technically difficult. A dual mobility liner can help to salvage a well-fixed acetabular component. The present paper reports the clinical and radiographic outcome of revision of failed Birmingham modular MoM-THA using a dual mobility liner.

Methods

The present study reports on ten patients (3 female and 7 male) with 11 revision THAs. Patients underwent revision an average of 51 months (range 40–73 months) after index procedure. Mean follow-up after the revision was 31 months (range 24–37 months) and all patients underwent an MRI with metal artifact reduction software (MARS) at least two years after revision to assess for local polyethylene wear and osteolysis.

Results

The Harris Hip score improved from 92.2 (range 63.0–100.0) to 100.0 (p = 0.072). One patient had a one-time dislocation within seven days of surgery. No patient required additional surgeries. Radiographs showed no signs of component loosening and osteolysis and MRI imaging revealed no evidence of polyethylene wear or osteolysis.

Conclusion

A dual mobility liner in an existing Birmingham cup can provide excellent clinical and radiological short-term results without MRI evidence of increased polyethylene wear. Post-operative hip precautions should be enforced.
Literatur
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Metadaten
Titel
Salvage of a monoblock metal-on-metal cup using a dual mobility liner: a two-year MRI follow-up study
verfasst von
Maximilian F. Kasparek
Lisa Renner
Martin Faschingbauer
Wenzel Waldstein
Kilian Rueckl
Friedrich Boettner
Publikationsdatum
19.09.2017
Verlag
Springer Berlin Heidelberg
Erschienen in
International Orthopaedics / Ausgabe 5/2018
Print ISSN: 0341-2695
Elektronische ISSN: 1432-5195
DOI
https://doi.org/10.1007/s00264-017-3641-9

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