Document Type : SYSTEMATIC REVIEW
Authors
1
1 Amsterdam University Medical Centres, location Academic Medical Center, University of Amsterdam, Department of Orthopaedic Surgery, Amsterdam Movement Sciences Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands 2 Xpert Clinics Orthopedie, Laarderhoogtweg 12, 1101EA Amsterdam, The Netherlands 3 Tergooi, department of Orthopaedic Surgery, Van Riebeeckweg 212, 1213 XZ, Hilversum, The Netherlands
2
Leiden University Medical Center, department of Orthopaedic Surgery, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
3
Xpert Clinics Orthopedie, Laarderhoogtweg 12, 1101EA Amsterdam, The Netherlands- Spaarne Gasthuis, Spaarne Gasthuis Academy, Spaarnepoort 1, 2134 TM Hoofddorp, The Netherlands
4
Amsterdam University Medical Centres, location Academic Medical Center, University of Amsterdam, Department of Orthopaedic Surgery, Amsterdam Movement Sciences Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
5
Leiden University Medical Center, department of Orthopaedic Surgery, Albinusdreef 2, 2333 ZA Leiden, The Netherlands- OLVG, department of Orthopaedic Surgery, Oosterpark 9, 1091 AC Amsterdam, The Netherlands
6
Xpert Clinics Orthopedie, Laarderhoogtweg 12, 1101EA Amsterdam, The Netherlands
Abstract
Background: The influence of bearing on revision, especially in press-fit modular cup total hip arthroplasty (THA),
remains underexposed.
Methods: A systematic literature review was conducted in PubMed, Embase, Cochrane Library, and ClinicalTrials.
gov in line with the PRISMA guidelines. The primary outcome was an overall revision between ceramic-on-ceramic
(CoC) and all sorts of ceramic-on-polyethylene (CoPE) bearings. As secondary outcomes complications and reasons for
revision were compared between bearings. Outcomes were presented in subgroups based on study design (randomized
controlled trials (RCT), non-randomized comparative, and registry studies). The quality of evidence was assessed using
the GRADE. The risk of bias was assessed using the Cochrane collaboration’s tool and the MINORS criteria.
Results: This meta-analysis included twelve RCTs, three nonrandomized comparative studies and two registry studies,
including 38,772 THAs (10,909 CoPE and 27,863 CoC). Overall revision showed a lower risk in CoPE compared to CoC
in the two registry studies (HR 0.71 (95%CI 0.53; 0.99)) (very low-quality GRADE evidence). In RCTs and nonrandomized
comparative studies, no difference was observed (low-quality GRADE evidence). Loosening, dislocation, infection, and
postoperative periprosthetic fracture showed no significant differences in risk ratio for all designs.
Conclusion: The lower risk of overall revision in registry studies of primary THA with a press-fit modular cup using
CoPE bearing compared to CoC should be considered preliminary since this outcome was just slightly significant,
based on very low-quality GRADE evidence and based on only two studies with several limitations. Since no
difference was observed in the other methodological designs and the separate reasons for revision showed no
significant difference in all designs either, no preference for CoC or CoPE can be expressed, and therefore both
seem a suitable options based on the available literature. More comparative long-term studies are needed to
confirm the potential advantages of wear-reduction of both bearings since the currently available literature is limited.
Level of evidence: I
Keywords