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Author Topic: post-ACL surgery, knee cap stuck when flexing?  (Read 7652 times)

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Offline Ikarus

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post-ACL surgery, knee cap stuck when flexing?
« on: June 29, 2007, 10:57:40 AM »
about 6 weeks ago I had an ACL reconstruction on my left leg. The ligament was a cadavour Alograph, so my own hamstring / patella was not harvested for it. So far the post-op has been great, my recovery has been really good. I've got a max-extension of about -2 degrees, the knee can bear my full body weight and i can flex quite well.

The problem, however, is that in a very specific circumstance (one that happens pretty often in daily moving around) my knee cap gets stuck. When I've extended the leg fully, and then I try to flex it, the patella "freezes" in place, and i have to wait for it slide back down. there's basically a .5 second pause before it slides into the right location. This doesn't happen when going from flextion to extension, only from extension to flexion. It  also doesn't happen if I don't extend the leg to maximum first.

My PT say that its probably the swelling, but my swelling is the lowest they've ever seen for a ACL knee surgery. I've been doing patella mobilization excercises (moving the patella by hand forwards and backwards, then side to side) but with very minimal effect.

While it isn't terribly painful, its really uncomfortable and if I am walking for a long time it can start to get annoying. Is there any idea as to what I can do about this?


Offline Linds

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Re: post-ACL surgery, knee cap stuck when flexing?
« Reply #1 on: June 29, 2007, 11:23:36 AM »
Hey.. it could be that due to muscle weakness caused by the surgery your patella is maltracking.  I think this is a pretty common side affect of ACLR surgery.  I know how uncomfortable it is, my kneecap does that naturally because of genetics and it's not a nice feeling at all.
Hopefully this is the case because once you build up your quads, hamstring strength it should go away.
You should try posting this down on the Cruciate board in teh specialist section . :)
1997 Scope RK
2002 LR RK
2002 Scope and hematoma evac RK
2004 LR LK
May 06 Fall from Horse, partial ACL tear and meniscus injury, Tibial plateau injury
2007 Scope, Plica Excision and Debride LK
2009/2010- Possibly Ankylosing Spondylitis?

Offline tanyap

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Re: post-ACL surgery, knee cap stuck when flexing?
« Reply #2 on: June 29, 2007, 12:52:21 PM »
thats interesting. my physio noticed that I find it difficult to go from full extension to flexion also. she said that in my case its a compensatory mechanism and as linds says - when i build up strength it should stop happening. its like i get kind of 'locked' into position for a second or so. they say my cruciate ligament seems fine - my MRI results have not been given yet though....so we shall see!!
1986 - recurrent dislocations of right patella began
1988 - Modified Hauser Procedure
1991 - dislocations started again
2005 to 2007 - 150 dislocations in 2 years - OUCH!!!
June 2007 - new OS, new physio
Oct 2007 - VMO woke up
Mar 2008 - big quads, still dislocating
Apr 2008 - next OS app

Offline Helix

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Re: post-ACL surgery, knee cap stuck when flexing?
« Reply #3 on: May 16, 2014, 08:57:29 AM »
To IKARUS

So how do you feel now. How did you manage to treat your patellar maltracking and subluxation? I have the same problem.















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