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Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.

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Related Experiment Video

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C-arm-Free Simultaneous OLIF51 and Percutaneous Pedicle Screw Fixation in a Single Lateral Position
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Dual mobility cups reduce dislocation in isolated cup revision.

Tae Woo Kim1,2, Min Uk Do1, Kyeong Baek Kim1

  • 1Department of Orthopedic Surgery, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea.

BMC Musculoskeletal Disorders
|March 29, 2025
PubMed
Summary

Dual-mobility cups (DMC) significantly reduce dislocation risk in revision total hip arthroplasty (THA) compared to conventional cups (CC). DMC is a favorable option for isolated cup revision surgery.

Keywords:
ComplicationsDislocationDual mobility cupsIsolated cup revisionTotal hip arthroplasty

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Area of Science:

  • Orthopedic Surgery
  • Arthroplasty Research

Background:

  • Dual-mobility cups (DMC) are increasingly used in total hip arthroplasty (THA) revision.
  • Prognosis and complications of isolated cup revision with DMC require further investigation.

Purpose of the Study:

  • To compare dislocation rates and clinical outcomes between DMC and conventional cups (CC) in isolated THA revision.
  • To evaluate the effectiveness of DMC in preventing complications after THA revision.

Main Methods:

  • Retrospective cohort study of 119 patients undergoing isolated cup revision (January 2009 - February 2020).
  • Patients were divided into DMC (n=49) and CC (n=70) groups.
  • Comparison of demographics, surgical approach, complications, and Harris hip scores.

Main Results:

  • No significant difference in preoperative evaluation or cup position between groups.
  • Zero dislocations in the DMC group versus six in the CC group (p=0.042).
  • Aseptic loosening was the most common complication, with no significant difference between groups.

Conclusions:

  • Dual-mobility cups effectively prevent dislocation in revision THA compared to conventional cups.
  • DMC is a recommended treatment for isolated cup revision, offering controlled options.