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Related Concept Videos

Bones of the Lower Limb: Femur and Patella01:16

Bones of the Lower Limb: Femur and Patella

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 neck...
Knee Joint01:23

Knee Joint

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 group...

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Related Experiment Video

Updated: Jun 8, 2026

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
09:01

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach

Published on: January 24, 2018

Patellofemoral arthroplasty.

Jess H Lonner1

  • 1Department of Orthopedic Surgery, Pennyslvania Hospital, Philadelphia, Pennsylvania, USA. jess.lonner@uphs.upenn.edu

Orthopedics
|September 16, 2010
PubMed
Summary
This summary is machine-generated.

Patellofemoral arthroplasty is a viable option for isolated anterior knee arthritis, especially in active patients. Modern designs have improved outcomes, though late tibiofemoral degeneration remains a concern.

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Last Updated: Jun 8, 2026

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
09:01

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach

Published on: January 24, 2018

Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Knee Biomechanics

Background:

  • Isolated patellofemoral arthritis affects up to 9% of adults over 40, particularly women.
  • Non-arthroplasty surgical options for refractory cases often yield unsatisfactory results.
  • Total knee arthroplasty (TKA) is effective but less desirable for young, active individuals.

Purpose of the Study:

  • To evaluate the role and outcomes of patellofemoral arthroplasty for isolated anterior compartment knee arthritis.
  • To compare the efficacy of modern patellofemoral implants with historical designs.
  • To assess the long-term failure modes and impact on subsequent TKA.

Main Methods:

  • Review of literature on patellofemoral arthroplasty outcomes.
  • Analysis of implant design evolution, focusing on trochlear component types (inlay vs. onlay).
  • Examination of long-term studies reporting failure rates and tibiofemoral degeneration.

Main Results:

  • Contemporary onlay trochlear components significantly reduce patellar maltracking compared to older inlay designs.
  • Early instability issues are minimized with modern patellofemoral implants.
  • Late tibiofemoral degeneration occurs in approximately 20% of cases at 15 years.
  • Prior patellofemoral arthroplasty does not appear to compromise outcomes of subsequent TKA.

Conclusions:

  • Patellofemoral arthroplasty is a legitimate treatment for isolated anterior knee arthritis, offering predictable pain relief.
  • Improvements in implant design have addressed prior concerns of instability.
  • Long-term considerations include potential tibiofemoral degeneration, but revision to TKA remains viable.