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Related Experiment Videos

Revision of failed patellar components.

Arlen D Hanssen1, Mark W Pagnano

  • 1Mayo Medical School, Department of Orthopedics, Mayo Foundation, Rochester, Minnesota, USA.

Instructional Course Lectures
|May 1, 2004
PubMed
Summary

In revision knee replacement, the patellar component can often be retained if well-fixed. Revision is necessary for loose or damaged components, with bone stock assessment guiding treatment for severe deficiencies.

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Area of Science:

  • Orthopedic Surgery
  • Biomaterials Science

Background:

  • Patellar component management is crucial in revision knee arthroplasty.
  • Many existing patellar components are well-fixed and can be retained.
  • Revision is indicated for loose, malpositioned, or damaged patellar components.

Purpose of the Study:

  • To outline criteria for retaining existing patellar components.
  • To describe management strategies for patellar bone deficiency in revision knee surgery.
  • To emphasize the importance of component positioning for patellar kinematics.

Main Methods:

  • Review of criteria for patellar component retention.
  • Assessment of patellar bone stock to guide revision strategies.
  • Description of surgical techniques for patellar reconstruction (e.g., bone grafting, augmentation).

Main Results:

  • The majority of patellar components in revision knee replacement are well-fixed.
  • Severe patellar bone deficiency requiring alternative techniques occurs in approximately 10% of cases.
  • Optimal femoral and tibial component positioning is vital for successful patellar revision.

Conclusions:

  • Retaining a well-fixed patellar component is often feasible in revision knee replacement.
  • Bone stock assessment is critical for selecting appropriate revision techniques in cases of deficiency.
  • Proper alignment of prosthetic components ensures optimal patellar function post-revision.

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