Hip & pelvis

The Korean Hip Society (대한고관절학회)
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Dislocation after Revision Total Hip Arthroplasty: A Comparison between Dual Mobility and Conventional Total Hip Arthroplasty

  • Hyun Sik Shin (Department of Orthopaedic Surgery, Hanyang University College of Medicine) ;
  • Dong-Hong, Kim (Department of Orthopaedic Surgery, Hanyang University College of Medicine) ;
  • Hyung Seok Kim (Department of Orthopaedic Surgery, Hanyang University College of Medicine) ;
  • Hyung Seob Ahn (Department of Orthopaedic Surgery, Hanyang University College of Medicine) ;
  • Yeesuk Kim (Department of Orthopaedic Surgery, Hanyang University College of Medicine)
  • Received : 2023.02.27
  • Accepted : 2023.08.01
  • Published : 2023.12.31
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Abstract

Purpose: The objective of this study was to analyze the results from a cohort of patients who underwent a revision total hip arthroplasty (THA) using a dual mobility cup (DMC) implant. Materials and Methods: A retrospective review of revised THAs was conducted using the database from a single tertiary referral hospital. A total of 91 revision THAs from 91 patients were included in the study. There were 46 male hips and 45 female hips. The mean age was 56.3±14.6 years, and the mean follow-up period was 6.4±5.9 years. In performance of revision THAs, the DMC implants were used in 18 hips (19.8%), and the conventional implants were used in 73 hips (80.2%). Results: During the follow-up period, three dislocations were identified, and the overall dislocation rate was 3.3%. Early dislocation (at one month postoperatively) occurred in one patient, while late dislocation (at a mean of 7.5 years) occurred in two patients. There was no occurrence of dislocation in the DMC group (0%), and three dislocations were detected in the conventional group (4.1%). However, no significant difference in the rate of dislocation was observed between the two groups (P=0.891). Conclusion: Although the rate of dislocation was higher in the conventional group, there were no statistically significant differences between the two groups due to the small number of patients. Nevertheless, we believe that the dual mobility design is advantageous in terms of reducing dislocation rate and can be recommended as an option for a revision THA.

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References

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