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Related Concept Videos

Knee Joint01:23

Knee Joint

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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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[Relationship between coronal intercondylar notch width index and osteoarthritis].

Cong Chen1, Yin-Hua Ma, Xiao-Yi Tan

  • 11Department of Orthopedics, 2Orthopedics Key Laboratory of Gansu Province, 3Department of Hematology, the Second Hospital of Lanzhou University, Lanzhou 730030, China.

Nan Fang Yi Ke Da Xue Xue Bao = Journal of Southern Medical University
|November 9, 2015
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Summary

Moderate to severe knee osteoarthritis (OA) is linked to significant intercondylar notch narrowing. Type A intercondylar notches are more prevalent in patients with this narrowing, indicating a potential diagnostic marker.

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Area of Science:

  • Radiology
  • Orthopedics
  • Biomedical Engineering

Background:

  • Knee osteoarthritis (OA) is a prevalent degenerative joint disease.
  • Intercondylar notch narrowing is a potential contributing factor or consequence of OA.
  • Accurate assessment of intercondylar notch dimensions is crucial for understanding OA pathogenesis.

Purpose of the Study:

  • To investigate the association between knee osteoarthritis severity and intercondylar notch narrowing.
  • To evaluate the diagnostic utility of the notch width index (NWI) and its variations (NWI-A, NWI-P) in identifying intercondylar notch stenosis.
  • To determine the relationship between intercondylar notch morphology (types A, U, W) and OA.

Main Methods:

  • Retrospective analysis of MR images from 79 knee OA patients (42 mild, 37 moderate-to-severe) and 70 healthy controls.
  • Calculation of notch width indexes (NWI, NWI-A, NWI-P) on coronal MR images.
  • Classification of intercondylar notch morphology into types A, U, and W on axial MR images.
  • Statistical analysis to determine associations between OA, NWI values, and notch types, with ROC curve analysis for cutoff values.

Main Results:

  • Patients with moderate to severe knee OA exhibited significantly smaller NWI, NWI-A, and NWI-P values compared to mild OA and control groups (P<0.05).
  • NWI values showed a significant association with the occurrence of moderate to severe OA (P<0.01).
  • Established cutoff values for diagnosing intercondylar notch narrowing: NWI <0.248, NWI-A <0.256, and NWI-P <0.266.
  • Type A intercondylar notch was significantly more common in patients with intercondylar notch narrowing (P<0.05).

Conclusions:

  • Moderate to severe knee osteoarthritis is associated with significant intercondylar notch narrowing.
  • Intercondylar notch narrowing can be diagnosed using specific NWI cutoff values.
  • Type A intercondylar notch morphology is a potential indicator for intercondylar notch narrowing in knee OA patients.