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Updated: Jun 18, 2025

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No Decrease in Early Survivorship of Dual Mobility Implants in Primary Total Hip Arthroplasty.

Anderson Lee¹, Jaymeson Arthur¹, Jawad Najdawi¹

¹Department of Orthopaedic Surgery, Cedars-Sinai Medical Center, Los Angeles, CA, USA.

Arthroplasty Today

|July 29, 2024

Summary

This summary is machine-generated.

Dual mobility (DM) implants in primary total hip arthroplasty (THA) significantly reduced dislocation rates. This study found DM implants offer improved safety without compromising survivorship at one-year follow-up.

Keywords:

Complications Dislocations Dual mobility Total hip arthroplasty

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Area of Science:

Orthopedic Surgery
Biomaterials Engineering

Background:

Dual mobility (DM) implants are increasingly used in primary total hip arthroplasty (THA).
Safety concerns regarding DM implants persist despite their growing popularity.
Understanding the short-term impact of modular DM implants on patient outcomes is crucial.

Purpose of the Study:

To analyze the adoption trends of DM implants in primary THA.
To evaluate the effect of modular DM implants on dislocation rates.
To assess the impact of modular DM implants on all-cause revision rates at short-term follow-up.

Main Methods:

Retrospective study of primary posterior approach THA patients (November 2013 - December 2020).
Exclusion of primary THA for fractures.
Comparison of modular DM implant cohort versus non-DM implant cohort.

Main Results:

Institutional adoption of DM implants rose from 3.4% (2013) to 47.1% (2020).
DM implants showed a significantly lower dislocation rate (0.14% vs. 0.84%, P=.04).
All-cause revision rates were similar between DM and non-DM groups at one-year follow-up (2.49% vs. 2.72%, P=.74).

Conclusions:

Modular DM implant utilization in primary THA has steadily increased.
DM implants are associated with decreased dislocation rates and comparable survivorship at one year.
Longer-term studies are needed to confirm the safety and efficacy of DM implants.