Types of ACL Injuries
An anterior cruciate ligament (ACL) injury often is called a sprain. A sprain occurs when the threads or fibers of the ligament stretch or are torn. Most ACL injuries occur in the middle of the ligament.
See an illustration of the knee and the ACL.
An ACL injury is classified as a grade I, II, or III sprain.
Grade I sprain
Grade II sprain
Grade III sprain
An ACL avulsion occurs when the ACL is torn away from either the upper leg bone or lower leg bone. This type of injury is more common in children than adults.
An avulsion fracture occurs when the ACL is torn away from the leg bone with a piece of the bone.
eMedicineHealth Medical Reference from Healthwise
To learn more visit Healthwise.org
© 1995-2012 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
Find out what women really need.
Most Popular Topics
Pill Identifier on RxList
- quick, easy,
Find a Local Pharmacy
- including 24 hour, pharmacies