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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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The bones of the human skeletal system are of varied shapes, sizes, and functions. They can be classified based on their shape and function into four major classes: long bones, short bones, flat bones, and irregular bones. Some classifications include a fifth type, the sesamoid bones, as a separate class, whereas others categorize them under short bones.
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Tissue Collection and RNA Extraction from the Human Osteoarthritic Knee Joint
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Osseous Morphological Differences in Knee Osteoarthritis.

Ahmed Siddiqi1,2,3, Hiba Anis4, Ilya Borukhov5

  • 1Division of Adult Reconstruction, Orthopedic Institute Brielle Orthopaedics, Ortho NJ, Manasquan, New Jersey.

The Journal of Bone and Joint Surgery. American Volume
|March 17, 2022
PubMed
Summary
This summary is machine-generated.

Osteoarthritis (OA) knees exhibit distinct morphological differences in the femur and tibia compared to healthy knees. Understanding these variations aids in personalized total knee arthroplasty (TKA) for improved patient outcomes.

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Area of Science:

  • Orthopedic surgery
  • Biomedical engineering
  • Radiology

Background:

  • Osteoarthritis (OA) impacts knee morphology, necessitating personalized approaches in total knee arthroplasty (TKA).
  • Understanding morphological variations in osteoarthritic knees with varus/valgus deformities is crucial for optimizing TKA implant positioning and balancing.
  • Current TKA strategies can be enhanced by detailed analysis of patient-specific knee anatomy.

Purpose of the Study:

  • To delineate morphological differences in the distal femur and proximal tibia associated with varus and valgus deformities in knee OA.
  • To provide a quantitative analysis of key anatomical parameters in osteoarthritic knees.
  • To establish a foundation for patient-specific TKA based on detailed knee morphology.

Main Methods:

  • Computed tomography (CT) scans of 1,158 knees (965 healthy, 193 OA) were analyzed.
  • Knees were categorized into normal, neutral, varus, and valgus subgroups based on deformity.
  • Measurements included angles (nwHKA, mLDFA, MPTA, slopes), rotation (PCA, sTEA), and ratios (condylar offset, condylar radius).

Main Results:

  • Osteoarthritic knees showed overall varus alignment and significant differences in medial posterior slope (MPS), lateral posterior slope (LPS), and medial coronal slope (MCS) compared to normal knees.
  • The posterior condylar axis (PCA) relative to the surgical transepicondylar axis (sTEA) and condylar offset/radius ratios differed between OA and normal groups.
  • Valgus deformity was specifically associated with a larger condylar radius ratio among OA subgroups.

Conclusions:

  • Significant differences in posterior condylar axis, condylar offset, condylar radius, and tibial slope (sagittal and coronal) exist between healthy and osteoarthritic knees.
  • These morphological variations provide critical insights for tailoring TKA procedures.
  • Personalized TKA based on patient-specific morphology is essential for improving clinical outcomes.