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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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Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
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Patellar eversion during total knee replacement: a prospective, randomized trial.

Michael J Reid1, Grant Booth2, Riaz J K Khan3

  • 1Chelsea and Westminster Hospital, 369 Fulham Road, London, SW10 9NH, United Kingdom.

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|February 7, 2014
PubMed
Summary
This summary is machine-generated.

Retracting the patella during total knee arthroplasty offers no significant early functional benefit over eversion. However, patellar subluxation may increase risks of patellar tendon damage and implant malpositioning.

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering

Background:

  • Minimally invasive total knee arthroplasty (TKA) techniques are evolving.
  • Patellar management during TKA, specifically retraction versus eversion, is debated for its impact on recovery and function.

Purpose of the Study:

  • To compare the clinical outcomes of patellar retraction versus eversion in patients undergoing TKA via a standard medial parapatellar approach.

Main Methods:

  • A prospective, randomized, double-blinded study involving 68 patients undergoing TKA.
  • Patients were assigned to either patellar retraction or eversion.
  • Outcomes including knee flexion, Oxford knee score, SF-12, and pain scores were assessed at 3 months and 1 year.

Main Results:

  • No significant differences in knee flexion, Oxford scores, or pain at 3 months or 1 year.
  • Patellar retraction (subluxation) showed a higher incidence of lateral tibial overhang (implant malpositioning) (p=0.005).
  • Two cases of patellar tendon division occurred in the retraction group, versus none in the eversion group.

Conclusions:

  • Retracting the patella does not provide significant early to medium-term clinical benefits compared to eversion in TKA.
  • Patellar eversion appears safe, with no increased risk of tendon shortening.
  • Patellar retraction may be associated with increased risks of patellar tendon injury and implant malpositioning.