Saturday, May 11, 2013

Effect of massive cuff tear on shoulder in an animal model.

Evaluation of cartilage degeneration in a rat model of rotator cuff tear arthropathy

This is an interesting study showing the importance of mechanical and neurogenic factors in the homeostasis of articular cartilage.

The authors used a rat model to study the effect on glenohumeral cartilage after (1)  infraspinatus and supraspinatus tenotomy or (2) suprascapular nerve transection. They found significant glenohumeral cartilage damage after both rotator cuff tenotomy and suprascapular nerve transection after only 12 weeks.

These authors suggest that altered mechanical loading may be the common factor in these degenerative joint surface changes.

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