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Patellar fractures after total knee replacement.

Kyung Ah Chun1, Kenjirou Ohashi, D Lee Bennett

  • 1Department of Radiology, The University of Iowa Hospital and Clinics, Iowa City, IA 52242, USA. ka1000@catholic.ac.kr

AJR. American Journal of Roentgenology
|August 27, 2005
PubMed
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Patellar fractures are an uncommon complication after total knee replacement. Understanding fracture patterns and clinical significance is crucial for radiologists.

Area of Science:

  • Orthopedic Surgery
  • Radiology
  • Biomedical Engineering

Background:

  • Total knee replacement (TKR) is a common procedure for knee osteoarthritis.
  • Patellar fractures are a rare but significant complication following TKR.

Purpose of the Study:

  • To characterize patellar fracture patterns after TKR.
  • To evaluate the clinical significance of these fractures.

Main Methods:

  • Retrospective review of 17 patellar fractures post-TKR over 10 years.
  • Analysis of radiographic and clinical data, including fracture type, displacement, and extensor mechanism integrity.

Main Results:

  • Incidence of patellar fractures post-TKR was 1.14%.
  • Diverse fracture patterns observed: transverse, comminuted, vertical, and avulsion.

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  • Most fractures were displaced; some associated with osteonecrosis or tendon disruption.

    • Conclusions:

    • Patellar fractures are infrequent but important TKR complications.
    • Familiarity with imaging features and clinical impact is essential for radiologists.