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[Imaging of patellofemoral instability].

S Waldt¹, E J Rummeny

¹Institut für diagnostische und interventionelle Radiologie, Klinikum rechts der Isar, Technische Universität München, Deutschland. simone.waldt@tum.de

|November 2, 2012

Summary

Patellofemoral instability diagnosis requires imaging to identify predisposing factors like trochlear dysplasia and patellar alta. Magnetic resonance imaging (MRI) is crucial for detecting acute lateral patellar dislocations and medial patellofemoral ligament (MPFL) damage.

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Area of Science:

Orthopedics
Radiology
Sports Medicine

Background:

Patellofemoral instability presents diagnostic and therapeutic challenges due to its complex origins.
Identifying anatomical abnormalities is key to managing this condition effectively.

Purpose of the Study:

To systematically analyze predisposing factors of patellofemoral instability using imaging.
To highlight the role of magnetic resonance imaging (MRI) in diagnosing acute injuries and chronic instability causes.

Main Methods:

Utilizing standardized measurement methods and various imaging modalities for accurate anatomical evaluation.
Employing MRI to diagnose acute lateral patellar dislocations by recognizing characteristic injury patterns.

Main Results:

Imaging analysis focuses on trochlear dysplasia, patella alta, tibial tuberosity-trochlear groove (TT-TG) distance, rotational deformities, and patellar tilt.
MRI effectively diagnoses acute lateral patellar dislocations.
Medial patellofemoral ligament (MPFL) damage is identified as a significant factor in chronic instability.

Conclusions:

Accurate diagnosis of patellofemoral instability relies on comprehensive imaging analysis of predisposing anatomical factors.
MRI plays a vital role in evaluating both acute dislocations and contributing factors to chronic instability, including MPFL injuries.