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Related Concept Videos

Knee Joint01:23

Knee Joint

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 group...
Bones of the Lower Limb: Femur and Patella01:16

Bones of the Lower Limb: Femur and Patella

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 neck...

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Related Experiment Video

Updated: May 19, 2026

Destabilization of the Medial Meniscus and Cartilage Scratch Murine Model of Accelerated Osteoarthritis
07:06

Destabilization of the Medial Meniscus and Cartilage Scratch Murine Model of Accelerated Osteoarthritis

Published on: July 6, 2022

The Relationship between Meniscal Tears and Meniscal Position.

Deborah M Allen1, Ling Li, Michel D Crema

  • 1New England Baptist Hospital Boston, MA, USA.

Therapeutic Advances in Musculoskeletal Disease
|August 8, 2012
PubMed
Summary
This summary is machine-generated.

Different meniscal tear types influence meniscal position, with complex medial tears causing significant extrusion. Understanding these patterns may help identify individuals at higher risk for knee osteoarthritis progression.

Keywords:
kneemagnetic resonance imagingmeniscal extrusionmeniscal positionmeniscal subluxationmeniscal tearosteoarthritis

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Last Updated: May 19, 2026

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07:06

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Published on: July 6, 2022

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Anterior Cruciate Ligament Transection and Synovial Fluid Lavage in a Rodent Model to Study Joint Inflammation and Posttraumatic Osteoarthritis

Published on: September 2, 2025

Area of Science:

  • Orthopedics
  • Radiology
  • Biomechanical Engineering

Background:

  • Meniscal tears are common knee injuries.
  • Meniscal position changes can impact knee biomechanics and osteoarthritis (OA) development.
  • Specific tear types may correlate with distinct meniscal displacement patterns.

Purpose of the Study:

  • To determine how various meniscal tear types influence meniscal position.
  • To investigate associations between meniscal tear patterns and meniscal extrusion or coverage.
  • To explore potential links between meniscal position and knee osteoarthritis progression.

Main Methods:

  • Cross-sectional analysis of 161 women from an observational knee OA progression study.
  • Baseline MRI data used to assess meniscal morphologic features and position (extrusion, coverage).
  • Multiple linear regression models analyzed relationships between tear types and meniscal position.

Main Results:

  • Medial meniscus tears (complex, cysts, maceration) correlated with increased medial and anterior extrusion.
  • Lateral meniscus horizontal tears showed increased lateral and anterior extrusion.
  • Anterior horn, body tears, and severe tear types of the medial meniscus were linked to greater medial extrusion.

Conclusions:

  • Specific meniscal tear types, particularly complex and macerated medial tears, lead to significant meniscal extrusion.
  • Lateral meniscal tears, primarily body and horizontal types, also affect extrusion.
  • Identifying tear types associated with meniscal dysfunction may aid in predicting knee OA progression risk.