Please confirm topic selection

Are you sure you want to trigger topic in your Anconeus AI algorithm?

Please confirm action

You are done for today with this topic.

Would you like to start learning session with this topic items scheduled for future?

Updated: Jan 1 2024

TKA Patellar Maltracking

  • Summary
    • TKA Patellar Maltracking is a common cause of patient dissatisfaction following TKA and is the most common reason for secondary surgery following total knee arthroplasty.
    • Diagnosis is made clinically with a combination of anterior knee pain, patellar subluxation during ambulation, and limitation in knee flexion.
    • Treatment may be nonoperative or operative depending on underlying etiology.
  • Epidemiology
    • Incidence
      • most common reason for secondary surgery following total knee arthroplasty
  • Etiology
    • Causes
      • may be related to
        • prosthetic design
        • extensor mechanism imbalance
        • asymmetric patellar resection
        • malrotation
          • internal rotation of components 
        • patellar malpositioning
  • Presentation
    • Symptoms
      • complaints may include
        • feelings of subluxation
        • frank dislocation
        • peri-patellar pain
        • limited flexion
  • Imaging
    • Radiographs
      • recommended views
        • AP
          • used to assess placement of femoral component and Q angle
        • lateral
          • used to assess size and rotation of femoral component
        • tangential
          • used to assess subluxation of patella, placement of patellar component, angle of patellar resection, and patellar tilt
      • findings
        • laterally subluxed patella
        • increased Q angle
        • anterior placement of femoral component
        • asymmetric patellar resection
        • lateral placement of patellar component
        • lateral osteophyte on patella
    • CT
      • best to assess for rotational malalignment
  • Treatment
    • Must appropriately address etiology
Card
1 of 3
Question
1 of 5
Private Note

Attach Treatment Poll
Treatment poll is required to gain more useful feedback from members.
Please enter Question Text
Please enter at least 2 unique options
Please enter at least 2 unique options
Please enter at least 2 unique options