There are four muscles in the shoulder that start on the scapula (shoulder blade) and attach to the ball in your shoulder joint to help your shoulder move. These muscles (red in the picture below) turn into tendons (the white part) as the muscles get closer to the bone. The tendon is the part that actually connects to the bone. The term rotator cuff is a general term referencing the specific area where the tendon connects to the bone. Thus, the term rotator cuff tear means a tear in the tendon where it connects to the bone.
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Literature and Resources
Does adding platelet-rich plasma (PRP) at the time of surgery improve your chance of a good outcome?
No, it does not. All patients in this study underwent surgical removal of the calcium deposit, and half of them received PRP at the time of surgery. All patients improved after surgery, and there was no difference in outcome in the PRP group.