Retrospective Cohort Study
Copyright ©The Author(s) 2024. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Clin Cases. Jul 6, 2024; 12(19): 3684-3691
Published online Jul 6, 2024. doi: 10.12998/wjcc.v12.i19.3684
Mid-term clinical outcomes of the uncemented Robert Mathys pressfit cup
Kishan Ritek Ramsodit, Inger N Sierevelt, Esther R C Janssen, Sjoerd Kaarsemaker, Daniël Haverkamp
Kishan Ritek Ramsodit, Inger N Sierevelt, Daniël Haverkamp, Department of Orthopedic Surgery, Xpert Clinics Amsterdam, Amsterdam 1101EA, North-Holland, Netherlands
Inger N Sierevelt, Department of Orthopedic, Spaarne Gasthuis Academy, Hoofddorp 2134 TM, Netherlands
Esther R C Janssen, Department of Orthopaedic Surgery, Viecuri Medical Centre, Venlo 5912 BL, Netherlands
Sjoerd Kaarsemaker, Department of Orthopaedic Surgery, Viecuri Medisch Centrum, Venlo 5912 BL, Netherlands
Author contributions: Ramsodit KR, Sierevelt IN, Janssen ERC, Kaarsemaker S, Haverkamp D have made substantial contributions to conception and design, acquisition of data, analysis and interpretation of data, and have been involved in drafting the manuscript; Ramsodit KR and Sierevelt IN have been involved in the acquisition of data; all authors have been involved in revising the manuscript, critically for important intellectual content, and have given final approval of the version to be published.
Institutional review board statement: This study was conducted as a sub study of a large cohort study for which ethical approval was obtained with the reference number NL47055.048.13.
Informed consent statement: All patients provided informed consent prior to participation in the study.
Conflict-of-interest statement: All the authors declare no conflict of interest related to the manuscript.
Data sharing statement: No additional data available.
STROBE statement: The authors have read the STROBE Statement – checklist of items, and the manuscript was prepared and revised according to the STROBE Statement – checklist of items.
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: https://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Daniël Haverkamp, MD, PhD, Doctor, Surgeon, Department of Orthopedic Surgery, Xpert Clinics Amsterdam, Laarderhoogtweg 12, 1101EA Amsterdam, North-Holland, Netherlands. d.haverkamp@xpertclinics.nl
Received: December 22, 2023
Revised: April 25, 2024
Accepted: May 16, 2024
Published online: July 6, 2024
Processing time: 189 Days and 12.5 Hours
Abstract
BACKGROUND

The use of uncemented cups during total hip arthroplasty (THA) has gained popularity in recent years. The Robert Mathys (RM) pressfit cup, an uncemented monoblock implant is expected to preserve bone density due to its composition and external surface, while reducing backside wear with its monoblock construction. These factors should lead to a high survival rate of the implant.

AIM

To evaluate the mid-term survival and functional outcome of the RM Pressfit cup in a large study population.

METHODS

Between 2011 and 2020, we included 1324 patients receiving a primary THA using the RM pressfit cup. Final clinical follow-up was performed at 2 years postoperatively with the Dutch arthroplasty register used to assess implant status thereafter. Revision for acetabular failure and reason for revision were reported to evaluate implant survival, while the hip disability and osteoarthritis outcome score (HOOS) scores were used to assess functional outcome.

RESULTS

The mean age at surgery was 64.9 years. The mean follow-up was 4.6 years. Of the 1324 THAs performed, 13 needed cup revisions within 5 years after index THA: 5 due to aseptic loosening, 6 due to infection, 2 due to dislocation and 2 due to other causes. This resulted in a 5-year cup survival of 98.8% (95%CI: 98.1-99.5). Nine of the cup revisions occurred within the first year after index THA. HOOS scores increased significantly in all domains during the first year and levelled out during the second year.

CONCLUSION

In the present study, the RM pressfit cup demonstrated excellent clinical outcomes at mid-term follow-up; however, future studies are needed to assess the long-term outcomes of this acetabular implant.

Keywords: Total hip arthroplasty, Uncemented RM pressfit cup, Hip osteoarthritis, Cup revision, Pressfit, Aseptic loosening

Core Tip: In this retrospective study we aimed to evaluate the cup revision rate and patient reported outcome measures in patients implanted with the uncemented Robert Mathys Pressfit cup. We found that this particular acetabular implant retained a high survival rate for cup revision and provided patients with adequate satisfaction in patients with a mid-term follow up.