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Related Concept Videos

Knee Joint01:23

Knee Joint

1.4K
The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris...
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Bones of the Lower Limb: Femur and Patella01:16

Bones of the Lower Limb: Femur and Patella

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The femur is the body's longest and strongest bone spanning the thigh region. Its head articulates with the acetabulum of the hip bone to form the hip joint. A minor indentation on the medial side of the femoral head, called the fovea capitis, serves as the site of attachment for the ligament of the head of the femur. This weak ligament spans the femur and acetabulum and supports the hip joint. The narrowed region below the head is the neck of the femur. The inclination angle between the...
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Conversion total hip arthroplasty following failed proximal femoral fixation: current concepts review.

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Related Experiment Video

Updated: May 21, 2025

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve
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The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve

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Current concepts in total knee arthroplasty: Rotating hinge prostheses.

Tiffany Carol Oliver1, Babar Kayani1, Tianyi David Luo1

  • 1University College Hospital, 235 Euston Road, Bloomsbury, London NW1 2BU, United Kingdom - Princess Grace Hospital, 42-52 Nottingham Place, Marylebone, London W1U 5NY, United Kingdom.

SICOT-J
|March 19, 2025
PubMed
Summary
This summary is machine-generated.

Rotating hinged total knee arthroplasty (RHTKA) is effective for complex knee instability and bone loss, showing comparable survival rates to standard knee replacements. Common complications include loosening and infection.

Keywords:
ArthroplastyImplant survivorshipKnee implantsKnee replacementRotating hinged knee

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Arthroplasty Research

Background:

  • Total knee arthroplasty (TKA) is a common procedure for end-stage knee arthritis.
  • Complex cases involving poor bone stock, soft tissue compromise, or instability present challenges for standard TKA.
  • Rotating hinged total knee arthroplasty (RHTKA) offers a solution for these demanding scenarios.

Purpose of the Study:

  • To review the indications, functionality, and outcomes of rotating hinged total knee arthroplasty (RHTKA).
  • To evaluate the effectiveness of RHTKA in primary and revision knee arthroplasty settings.
  • To assess implant survivorship and common complications associated with RHTKA.

Main Methods:

  • Narrative review of existing literature on rotating hinged total knee arthroplasty (RHTKA).
  • Analysis of studies reporting on indications, functional outcomes, range of motion, and complication rates.
  • Inclusion of data from radiostereometric analysis regarding component micromotion.

Main Results:

  • RHTKA is indicated for poor bone stock, soft tissue compromise, gross instability, and periprosthetic fractures.
  • Studies demonstrate improved range of motion and functional outcomes with RHTKA in primary and revision cases.
  • While some designs show early micromotion, implant survivorship is comparable to condylar-constrained TKA at mid-term follow-up.

Conclusions:

  • Rotating hinged total knee arthroplasty (RHTKA) is a viable option for complex primary and revision knee replacements.
  • Functional outcomes and implant survival are favorable, despite some concerns about early micromotion in specific designs.
  • Key complications include aseptic loosening, infection, stiffness, and periprosthetic fractures, requiring careful patient selection and management.