International Orthopaedics

, Volume 42, Issue 4, pp 761–767 | Cite as

Dislocations after use of dual-mobility cups in cementless primary total hip arthroplasty: prospective multicentre series

  • Ji-hyo Hwang
  • Sang-Min Kim
  • Kwang-Jun Oh
  • Yeesuk KimEmail author
Original Paper



The purpose of this study was to investigate the incidence of dislocation and specific complications of the dual-mobility cup.


The arthroplasties involved 167 hips in 165 patients; 51 hips (30.5%) were in men and 116 (69.4%) were in women. The active articulation E1® dual-mobility cup (Biomet, Warsaw, IN, USA) was used, and the surgical approach was posterolateral in 120 hips and anterolateral in 47 hips.


Four (2.3%) dislocations were observed. Mean time of dislocation was 30.5 days post-operatively. Three incomplete reductions occurred during closed reduction. When comparing parameters between dislocation and no-dislocation groups, there were no differences in patient and surgical parameters. However, all dislocations occurred in patients with femoral neck fractures and in the posterolateral approach group.


The incidence of dislocation in total hip arthroplasty (THA) using a dual-mobility cup was acceptable, and cup diameter of the dislocation group was substantially larger than that of no-dislocation group. Based on clinical outcomes of our study, we conclude that the dual-mobility cup is a reliable option in THA, and further studies are necessary.


Dislocation Hip Dual mobility cup Total hip arthroplasty 



There is no funding source.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

The Human Research Ethics Committees at each institution approved the study.

Informed consent

Informed consent was obtained from all individual participants included in the study.


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Copyright information

© SICOT aisbl 2017

Authors and Affiliations

  1. 1.Department of Orthopedic Surgery, Gangnam Sacred Heart HospitalHallym University School of MedicineSeoulSouth Korea
  2. 2.Department of Orthopedic SurgerySeoul Medical CenterSeoulSouth Korea
  3. 3.Department of Orthopedic Surgery, KonKuk University Medical CenterKonKuk University School of MedicineSeoulSouth Korea
  4. 4.Department of Orthopedic Surgery, School of MedicineHanyang UniversitySeoulSouth Korea

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