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Related Concept Videos

Bones of the Lower Limb: Tibia and Fibula01:10

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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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The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...
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Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
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Stemmed tibial revision component alignment: Does an anatomic conflict exist?

Kevin M Smith1, Andrew Moorman1, Sabir K Ismaily2

  • 1Houston Methodist Orthopedics & Sports Medicine, 6445 Main St., Outpatient Center, Suite 2500, Houston, TX 77030, United States.

The Knee
|December 29, 2016
PubMed
Summary
This summary is machine-generated.

In revision total knee arthroplasty (TKA), canal-filling tibial stems may compromise coronal alignment in tibias with native valgus. Non-canal filling stems offer better alignment correction.

Keywords:
Canal filling tibial stemsCoronal plane alignment, tibial mechanical axisNon-canal filling tibial stemsRevision total knee arthroplastyTibial component

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Area of Science:

  • Orthopedic surgery
  • Biomechanical engineering

Background:

  • Coronal plane alignment is critical for successful revision total knee arthroplasty (TKA).
  • Tibial stemmed component alignment can present anatomic conflicts.

Purpose of the Study:

  • To evaluate tibial coronal plane alignment in revision TKA using tibial stems.
  • To identify potential anatomic conflicts in tibial stemmed component alignment.

Main Methods:

  • Radiographic review of 88 revision TKA cases.
  • Assessment of varus/valgus alignment, stem type (canal-filling vs. non-canal filling), and native tibial bow on full leg radiographs.

Main Results:

  • Canal-filling stems in native valgus tibias (≥3 degrees) resulted in valgus tibial stem alignment in 87.5% of cases.
  • Non-canal filling stems in native valgus tibias improved alignment by ~2 degrees, achieving neutral placement in 64.7% of cases.

Conclusions:

  • Tibial component positioning is constrained by stem type and native tibial angulation.
  • Canal-filling stems may compromise coronal alignment when anatomic conflict exists between the tibial mechanical axis and the intramedullary canal.