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Related Concept Videos

Bones of the Lower Limb: Tibia and Fibula01:10

Bones of the Lower Limb: Tibia and Fibula

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The tibia is the main weight-bearing bone of the lower leg. It is larger than the fibula with which it is paired. The tibia is also the second longest bone in the body and is located right below the skin. The proximal end of the tibia forms the medial and the lateral condyle, which articulates with the condyles of the femur to form the knee joint. Between the articulating surfaces is the irregular elevated area known as the intercondylar eminence that serves as the inferior attachment point for...
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Bones of the Lower Limb: Femur and Patella01:16

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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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Related Experiment Video

Updated: Mar 5, 2026

Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
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Does the tibia component design affect the need for offset stems in revision total knee arthroplasty?

X Foruria1,2, T Schmidt-Braekling2, D Arana Nabarte1,2

  • 1Hospital Galdakao Usansolo, Barrio Labeaga s/n 48960, Galdakao, Spain.

Archives of Orthopaedic and Trauma Surgery
|March 24, 2017
PubMed
Summary

Anatomic tibial baseplates need less offset in knee revision surgery with minimal bone loss. Symmetric baseplates require less offset for larger bone defects, impacting revision total knee arthroplasty outcomes.

Keywords:
ArthroplastyAsymmetricKneeOffsetSymmetricTibia baseplate

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Radiographic Analysis

Background:

  • Stem/keel placement differs between anatomic and symmetric revision tibial baseplates.
  • Understanding this variation is crucial for optimizing revision total knee arthroplasty (TKA).

Purpose of the Study:

  • To investigate how stem location (anatomic vs. symmetric) affects the need for offset couplers in revision TKA.
  • To quantify the offset required for different tibial baseplate designs based on bone defect size.

Main Methods:

  • Digital templating of 75 patients' hip-to-ankle and lateral radiographs.
  • Measurement of anterior-posterior and medial-lateral offset between tibial diaphysis center and baseplate stem.
  • Analysis across four tibial resection levels relative to the fibular head.

Main Results:

  • Anatomic baseplates required significantly less offset (2.28 mm vs. 5.44 mm) at resection levels up to the fibular head (p < 0.001).
  • Symmetric baseplates required less offset at resection levels below the fibular head (e.g., 1.52 mm vs. 5.66 mm at level 3, p < 0.001).

Conclusions:

  • Anatomic tibial baseplates offer advantages in revision TKA with minimal bone loss.
  • Symmetric tibial baseplates are associated with reduced offset needs when significant bone defects are present.