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Updated: Jul 1, 2025
07:43
In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy
Published on: July 2, 2021
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[Radiological diagnostics of patellofemoral instability and patellar dislocation]
Sonja Schuldes1, Carsten Hackenbroch2,3
1Klinik für diagnostische und interventionelle Radiologie und Neuroradioradiologie, Bundeswehrkrankenhaus Ulm, Oberer Eselsberg 40, 89081, Ulm, Deutschland. sonjaschuldes@bundeswehr.org.
Radiologie (Heidelberg, Germany)
|March 14, 2024
Summary
Patellofemoral instability (PFI) involves kneecap (patella) dislocation, often due to anatomical factors or trauma. This review details radiological risk factors and measurement techniques for diagnosing PFI.
Area of Science:
- Orthopedics
- Radiology
- Biomechanics
Context:
- Patellofemoral instability (PFI) is characterized by patellar (sub)luxation.
- It often results from acute trauma or anatomical predispositions leading to patellar maltracking.
Purpose:
- To present commonly used and validated radiological measurement techniques for assessing patellofemoral instability.
- To illustrate the typical injury patterns associated with lateral patellar dislocation.
Summary:
- PFI arises from nonphysiological patellar movement (maltracking) due to ligamentous injury or anatomical risk factors.
- Key radiological risk factors include trochlear dysplasia, patella alta, patellar tilt, tibial tuberosity lateralization, torsional deformity, and genu valgum.
Impact:
- Provides clinicians with essential radiological assessment tools for diagnosing PFI.
- Enhances understanding of the biomechanical and anatomical factors contributing to patellar instability.
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