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A 43-year-old member asked:

can the acl slip out of place?

1 doctor answer2 doctors weighed in
Dr. Mark Galland
Orthopedic Surgery 32 years experience
No: The acl cannot "dislocated" per se and still be intact. If this occurs you would have an acl tear.

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A 37-year-old member asked:

What is thermal shrinkage of an acl?

2 doctor answers4 doctors weighed in
Dr. Bryan Reuss
Orthopedic Surgery 21 years experience
Controversial: This type of procedure is advocated by some surgeons in an effort to avoid revision ACL reconstruction surgery. I do not advocate it as the thermal activity can damage the ACL graft tissue and will not (and has not been supported in the literature) have any long term effect on the loose graft. If the knee/graft is loose/unstable, the surgery needs to be fully revised in my opinion.
A 48-year-old member asked:

What sorts of movements usually damage the acl?

2 doctor answers4 doctors weighed in
Dr. Bryan Reuss
Orthopedic Surgery 21 years experience
Cutting Sports: Sudden changes in direction or rotational movements are common mechanisms of the "non-contact" ACL injury. Hyper-extension or hyper-flexion can also damage the acl. Contact injuries, such as a blow to the side of the knee, can also often result in an ACL injury.
A 46-year-old member asked:

Where is the ACL located exactly?

3 doctor answers3 doctors weighed in
Dr. Douglas Chang
Physical Medicine and Rehabilitation 21 years experience
A 48-year-old member asked:

Is it easy to tear an ACL if I long board all the time?

3 doctor answers4 doctors weighed in
Dr. John Ayres
Orthopedic Surgery 37 years experience
No: The ACL torn is from an injury not overuse. Injuries occur with falls and you are more likley to fall when tired or distracted, when using a new board, going out in rough. If you are surfing or participating in any sporting endeavor, there is always the risk of knee injury and that includes ACL tear, but you can minimize the risks by being alert, careful, and staying healthy.
A 24-year-old member asked:

Is it possible to just not have an acl?

3 doctor answers3 doctors weighed in
Dr. John Ayres
Orthopedic Surgery 37 years experience
Yes: Agenesis or congenital absence of the ACL has been described in patients who are born without an acl. It is rare and may be associated with absence of a meniscus, limb length discrepancy. Typically the patients have symptomatic instability causing them to seek care, which usually requires surgical ACL reconstruction.

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Last updated Sep 15, 2013
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