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Related Concept Videos

Knee Joint01:23

Knee Joint

3.4K
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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Bones of the Lower Limb: Femur and Patella01:16

Bones of the Lower Limb: Femur and Patella

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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: May 6, 2026

In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty
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In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty

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[Unicompartmental knee arthroplasty and patellar problems].

P Ségal1, G Girard, D Gandon

  • 1Service Chirurgie Orthopédie Traumatologie II, CHU, Hôpital Maison Blanche, 45, rue Cognacq Jay, F-51092, Reims Cedex, France.

European Journal of Orthopaedic Surgery & Traumatology : Orthopedie Traumatologie
|November 7, 2013
PubMed
Summary

Anterior knee prosthesis impingement is rare and usually due to implant design. Femoro-patellar issues do not preclude knee replacement surgery.

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Area of Science:

  • Orthopedic surgery
  • Biomedical engineering
  • Knee biomechanics

Context:

  • Unicompartmental knee arthroplasty (UKA) is a common procedure.
  • Femoro-patellar joint involvement can complicate knee arthroplasty decisions.
  • Prosthetic design plays a role in surgical outcomes.

Purpose:

  • To investigate the incidence and causes of femoro-patellar impingement after UKA.
  • To evaluate the impact of UKA on femoro-patellar biomechanics.
  • To determine if pre-existing femoro-patellar issues contraindicate UKA.

Summary:

  • Anterior impingement between the knee prosthesis and patella is uncommon.
  • Prosthesis over-thickness is a potential cause of patellar conflict during flexion.
  • UKA effectively reduces valgus deformity and associated femoro-patellar strain.
  • Patellar surgeries are generally not indicated before or after UKA.
  • Femoro-patellar involvement does not contraindicate UKA.

Impact:

  • Findings suggest that UKA can be safely performed in patients with some degree of femoro-patellar involvement.
  • Optimized prosthetic design can minimize the risk of anterior impingement.
  • This research informs surgical decision-making for complex knee osteoarthritis cases.