Affiliations: [a] University Hospital Marburg, Center for Orthopedics and Traumatology, Baldingerstrasse, 35043 Marburg, Germany | [b] Department of Orthopaedic Surgery, University Hospital of Saint Etienne, France | [c] Clinic Jung-Stilling, Department for Trauma, Siegen, Germany | [d] Orthomedicum Mittelhessen, Stadtallendorf, Germany | [e] Orthopaedicum Lich, Germany | [f] Joint Center Hilden, Ruhr-University Bochum, Germany | [g] ORTHOmedic Frankfurt Offenbach, Germany
Correspondence:
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Corresponding author: Antonio Klasan, University Hospital Marburg, Center for Orthopedics and Traumatology, Baldingerstrasse, 35043 Marburg, Germany. Tel.: +49 6421 58 64715; Fax: +49 6421 58 67007; E-mail: [email protected].
Abstract: BACKGROUND: There is a clear tendency towards cementless acetabular components in primary total hip arthroplasty. OBJECTIVE: The aim of this study was to assess the long-term clinical and radiological outcome of titanium cementless acetabular cups when combined with a highly crosslinked polyethylene liner. METHODS: This study is a retrospective follow-up of 67 cups in 64 patients. Clinical outcomes were assessed using the Harris Hip Score. Radiolucent lines, osteolysis and loosening were assessed radiologically. Implant survival was determined using the Kaplan-Meier analysis. RESULTS: The average Harris Hip Score at follow-up was 80.3 ± 14.5. Signs of osteolysis were observed in 7.1% of the radiographs. No aseptic loosening of the cup was reported. Survival of the cup with aseptic loosening as an endpoint was 100%. A comparison with 19 other studies using the same material combination demonstrated very similar results. All manufacturers with available studies have at least one report of 100% survivorship at 10-year follow-up for their titanium cup and highly crosslinked polyethylene acetabular component combination with aseptic loosening as an endpoint. CONCLUSIONS: The data suggests that the rate of aseptic loosening of a titanium cup combined with a highly-crosslinked polyethylene liner at 10-year follow-up could be as low as 0%.
Keywords: Hip arthroplasty, cementless, acetabulum, polyethylene, titanium
