TherEx | Patellar Stabilization Series [Part 1] | Subluxation vs Dislocation

The video tutorial covers patellar luxation and subluxation, starting with an overview and moving into a detailed review of knee anatomy. It explains the definitions of luxation and subluxation, highlighting the differences between them. The tutorial discusses the directions of luxation, medial and lateral, and their effects on the knee. It also introduces a grading system for luxations, explaining the implications of each grade and the associated tibial rotation.

What is the primary function of the patellar ligament?

• To connect the patella to the femur

• To attach the patella to the tibial tuberosity

• To stabilize the fibula

• To support the quadriceps muscle

How is a luxation different from a subluxation?

• Luxation is a partial dislocation, while subluxation is complete

• Luxation requires exercise therapy, subluxation requires surgery

• Luxation is a complete dislocation, subluxation is partial

• Luxation involves ligament tears, subluxation does not

Which direction of patellar luxation is more common?

• Medial luxation

• Anterior luxation

• Lateral luxation

• Posterior luxation

What happens to the tibia during a lateral patellar luxation?

• It rotates medially

• It rotates laterally

• It remains stable

• It fractures

In a Grade 1 luxation, what is required to dislocate the patella?

• Therapeutic exercise

• Surgical intervention

• Manual force

• Spontaneous movement

What characterizes a Grade 3 patellar luxation?

• The patella spontaneously returns to the trochlear groove

• The patella cannot be manually repositioned

• The patella remains stable in the trochlear groove

• The patella is permanently dislocated but can be manually repositioned

What is the degree of tibial rotation expected in a Grade 4 luxation?

• 90 to 120 degrees

• 60 to 90 degrees

• 30 to 60 degrees

• 0 to 30 degrees