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Updated: Jun 8, 2026
09:31
Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
Published on: February 27, 2018
12.5K
No dislocation rate gap between single and two-stage revisions with a cementless Dual Mobility Cup
Justine Bidard1, Nory Elhadjene2, Nicolas Zadel1
1Orthopaedic and Traumatology Surgery, Saint-Etienne University Hospital, Jean Monnet University, 42055 Saint-Etienne Cedex 2, France.
SICOT-J
|March 6, 2026
Summary
Dual-mobility cups (DMC) showed similar dislocation rates in single-stage versus two-stage revision hip arthroplasty. This finding supports DMC utility in complex hip revision surgeries, irrespective of the surgical approach.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Clinical Research
Background:
- Hip arthroplasty dislocation is a significant complication, with higher rates in revision cases, particularly those involving prosthetic joint infection and two-stage surgery.
- Dual-mobility cups (DMC) have shown potential in revision hip arthroplasty, but direct comparisons with other techniques are limited.
- This study investigates the efficacy of cementless DMC in reducing dislocation rates during single-stage versus two-stage revision total hip arthroplasty (THA).
Purpose of the Study:
- To compare the dislocation rates between single-stage and two-stage revision THA utilizing cementless dual-mobility cups (DMC).
- To evaluate dislocation-free survival, re-revision rates, and mortality between the two surgical approaches.
- To identify risk factors associated with dislocation in revision hip arthroplasty.
Main Methods:
- A single-center, retrospective case-control study was conducted from January 2011 to December 2020.
- Forty patients undergoing two-stage revision THA with DMC were matched with 80 controls undergoing single-stage revision THA based on age, sex, and Paprosky grade.
- The primary endpoint was the dislocation rate, with secondary endpoints including dislocation-free survival and re-revision rates.
Main Results:
- No significant difference in dislocation rates was observed between two-stage (7.5%) and single-stage (3.8%) revision THA (p=0.40).
- Auto-inflammatory disease and immunosuppressive agent use were identified as risk factors for dislocation in univariate analysis.
- Dislocation-free survival (p=0.40), re-revision rates (p=0.92), and mortality rates did not differ significantly between the groups.
Conclusions:
- Cementless dual-mobility cups (DMC) demonstrate comparable dislocation rates in both single-stage and two-stage revision total hip arthroplasty (THA).
- The findings suggest DMC is a viable option for managing instability in complex hip revision cases.
- Further research is recommended to fully elucidate the benefits of DMC in preventing dislocation, especially in two-stage revision THA procedures.
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