Related Experiment Video
Updated: Jul 20, 2026
The Use of Mixed Reality in Custom-Made Revision Hip Arthroplasty: A First Case Report
Published on: August 4, 2022
Long-term results of 58 hip cup revision arthroplasties using a threaded ring implant
Christoph von Schulze Pellengahr1, Tobias Düll, Peter E Müller
1Department of Orthopedics, Grosshadern Medical Center, University of Munich, Marchioninistrasse 15, 81366 Munich, Germany. DrPellengahr@compuserve.de
Introduction:
There is still a discussion whether cementless hip cup revisions should be performed with a press fit cup or a threaded ring implant.
Materials And Methods:
The results of 58 hip cup changes using the spherical, threaded ring "Munich" are presented. In 16 cases, the ring "Munich I" with a smooth surface and in 42 cases the ring "Munich II" with a corundum-blasted surface were implanted. Mean follow-up was 7.5 years; radiological signs of loosening and the Harris Hip Score were examined.
Results:
The re-revision rate for aseptic loosening of the ring was 12/58 overall (Munich I: 5/16, Munich II: 7/42). The average Harris Hip Score was 76.2 overall (Munich I: 74.4, Munich II: 76.8). Higher survival rates were achieved with the "Munich II" ring due to improved construction details.
Conclusion:
These rates are still below those reported for press-fit cups, the technique described by Slooff or reinforcement rings.
