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Single Peg Patellar Component Fracture in Total Knee Replacement: A Case Report.

Jonathan T Moshe1, Bailey A Lillis1, Gregory T Minutillo1

  • 1Orthopedic Associates of Long Island, East Setauket, New York.

Journal of Orthopaedic Case Reports
|March 12, 2026
PubMed
Summary

This case report details a rare complication following total knee arthroplasty (TKA): a shear fracture of a press-fit patellar component. This novel failure mode highlights potential issues in cementless TKA procedures.

Keywords:
Total knee arthroplastycase reportpatella fracturepatellar component

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Fractures: Bone Repair01:27

Fractures: Bone Repair

Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...