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Related Concept Videos

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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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.
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Related Experiment Video

Updated: Jan 6, 2026

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

Anders Odgaard1, Jonathan Eldridge2, Frank Madsen3

  • 1Department of Orthopedics, Copenhagen University Hospital Herlev-Gentofte, Hellerup, Denmark.

JBJS Essential Surgical Techniques
|October 4, 2019
PubMed
Summary
This summary is machine-generated.

Patellofemoral arthroplasty (PFA) offers faster recovery and better knee function than total knee arthroplasty (TKA) in the first two years post-surgery. PFA patients regain range of motion sooner than TKA patients.

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Area of Science:

  • Orthopedic surgery
  • Biomedical engineering

Background:

  • Patellofemoral arthroplasty (PFA) has been available since 1979.
  • Previous reviews highlighted the need for comparative studies between PFA and total knee arthroplasty (TKA) for isolated patellofemoral osteoarthritis.
  • A blinded randomized controlled trial (RCT) was initiated in 2007 to compare PFA and TKA.

Purpose of the Study:

  • To compare the outcomes of PFA versus TKA for isolated patellofemoral osteoarthritis.
  • To evaluate patient recovery, knee function, and range of motion following PFA and TKA.

Main Methods:

  • A blinded randomized controlled trial (RCT) comparing PFA and TKA was conducted.
  • General principles for PFA include specific indications, replacement of patellofemoral joint surfaces, smooth transitions, and normal patellofemoral tracking.
  • Nonoperative treatments are primary, but surgical intervention, including PFA or TKA, is indicated for bone-on-bone patellofemoral joint degeneration.

Main Results:

  • Patients undergoing PFA demonstrated quicker recovery compared to those undergoing TKA.
  • PFA patients exhibited superior average knee function within the first two years post-surgery.
  • PFA patients regained preoperative range of motion within one year, while TKA patients required over two years.

Conclusions:

  • The 2-year results of the RCT support the practice of using PFA for isolated patellofemoral osteoarthritis.
  • PFA is a rewarding procedure when indicated correctly, offering advantages in recovery and function over TKA.
  • While PFA may remain a specialized procedure, knee arthroplasty centers should be equipped to offer it.