7 doctors weighed in:

What sort of problem is an anterior cruciate ligament (a.C.L.) injury?

7 doctors weighed in
Dr. Sean MacKenzie
Physical & Rehabilitation Medicine
3 doctors agree

In brief: Ligament sprain/tear

The acl is a ligament inside the knee that helps to keep the knee stable - keeps it from moving too far forward or backward.
It works with the posterior cruciate ligament (pcl) to accomplish this. The acl is often injured when running or other fast movements when the lower leg is planted on the ground and the knee is bent and twisted. It can be a strain or sprain or a complete tear.

In brief: Ligament sprain/tear

The acl is a ligament inside the knee that helps to keep the knee stable - keeps it from moving too far forward or backward.
It works with the posterior cruciate ligament (pcl) to accomplish this. The acl is often injured when running or other fast movements when the lower leg is planted on the ground and the knee is bent and twisted. It can be a strain or sprain or a complete tear.
Dr. Sean MacKenzie
Dr. Sean MacKenzie
Thank
1 comment
Dr. Jeffrey Sider
agree but the differentiation of grade 1 through 3 with a completer tear is critical in determining appropriate treatment.
Dr. J.Milo Sewards
Orthopedic Surgery
2 doctors agree

In brief: Knee instability

When you tear the acl, you lose one of the stabilizing ligaments in your knee.
That can allow your knee to become unstable or shift with certain movements. A knee that keeps on shifting can wind up damaging other structures (the meniscus or articular cartilage). Some people can rehab their knee and may not need an acl reconstruction, while others will need a reconstruction even for daily activity.

In brief: Knee instability

When you tear the acl, you lose one of the stabilizing ligaments in your knee.
That can allow your knee to become unstable or shift with certain movements. A knee that keeps on shifting can wind up damaging other structures (the meniscus or articular cartilage). Some people can rehab their knee and may not need an acl reconstruction, while others will need a reconstruction even for daily activity.
Dr. J.Milo Sewards
Dr. J.Milo Sewards
Thank
Get help from a real doctor now
Dr. Warren Strudwick
Board Certified, Sports Medicine
26 years in practice
490K people helped
Continue
108,000 doctors available
Read more answers from doctors