1. Common Knee Injuries

2. Ligament Tears
Grades
I : less than 1/3 of ligament fibers are damaged or torn
II : between 1/3 and 2/3 of ligament fibers are damaged or torn
III : more than 2/3 of ligament fibers are damaged or torn (usually ruptured!)

3. ACL Tear
Anterior
Cruciate
Ligament

4. Anterior Cruciate Ligament (ACL)
Mechanism of Injury : hyperextension or changing directions quickly or slowing down quickly

5. Anterior Cruciate Ligament
Orthopedic Test = Anterior Drawer Test

6. Posterior Cruciate Ligament (PCL)

7. Posterior Cruciate Ligament (PCL)
Mechanism of Injury : knee is forced backward
Dashboard Injury

8. Posterior Cruciate Ligament (PCL)
Orthopedic Test : Posterior Sag Test

9. Lateral Collateral Ligament (LCL)

10. Lateral Collateral Ligament (LCL)
Mechanism of Injury : Varus force (force from inside causes ligament to rupture on lateral side)

11. Lateral Collateral Ligament (LCL)
Orthopedic Test : Varus Stress Test

12. Medial Collateral Ligament (MCL)

13. Medial Collateral Ligament (MCL)
Mechanism of Injury : Valgus force from outside forces ligament on inside to tear

14. Medial Collateral Ligament (MCL)
Orthopedic Test : Valgus Stress Test

15. Meniscal Tear
Tears can occur from TWISTING, Hyperflexion, or Hyperextension

16. Types of
Meniscus
Tears

18. Meniscus Tear
Orthopedic Test : Mc Murray’s

19. Patella Dislocation

20. Patella Dislocation Patella dislocates LATERALLY
Orthopedic Test : Apprehension Test

21. Patellar Tendinitis (Jumper’s Knee)

22. Osgood Schlatter’s Knee
Knee pain from growing too much
Bigger bump on Tibial Tuberosity
Quadriceps are too strong for the Hamstrings
Need to develop a balance

23. Osgood Schlatter’s Syndrome

24. IT Band Syndrome (Runner’s Knee)

25. IT Band Syndrome Caused by irritation of IT band
Pain is usually felt down in the lateral knee
Go by signs and symptoms