Joint Preservation Blog

January 19, 2009

Exercises that Stress the Rotator Cuff

The rotator cuff provides stability to the shoulder.  The most commonly injured muscle of the four muscles that make up the “rotator cuff” (Supraspinatus, Infraspinatus, Teres, Subscapularis) is the supraspinatus.  Exercises that stress the rotator cuff would focus on use of these four muscles more than other surrounding shoulder muscles (like the trapezius).  To stress the supraspinatus, the empty can maneuver is the best way to go.  Place your arm out to the side with the thumb down like you’re pouring out a can of soda.  The arm should be slightly forward.  If you move your arm up and down from the side of your body to just shoulder level, the muscle being stressed is the supraspinatus.  If this is painful and if when you place the thumb up much of the pain goes away, that’s a good indication that your supraspinatus muscle may be torn or injured.  If you can’t do this at all, it may be completely torn and retracted (not connected).  The infraspinatus and teres can be stressed by movements that externally roate the shoulder and arm (if you place your elbow at your side and start with your hand on your stomach and move it out to the side while keeping your elbow tucked in, that’s external rotation).  The subscapularis goes the other way, it brings the hand in with the elbow tucked into the side.  What if exercises won’t heal the problems?  You might consider some of the newer non-surgical methods that use injections of thepatient’s own stem cells to heal the rotator cuff tear.  The recovery times are much shorter and you can avoid the knife!

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January 8, 2009

Bone Stimulators

As a doctor, patients with a fracture that won’t heal can be in quite a pickle. There are many bone stimulators on the market including the Exogen, the Symphony bone growth stimulator, and the mbi bone growth stimulator. How does a bone stimulator work ? There are two main types, ultrasound based and an electrical bone stimulator. The ultrasound type works by emitting a pulsed low intensity ultrasound signal (PLIUS). This has been shown to stimulate mesenchymal stem cells which turn into osteoblasts which are cells that make new bone. An electrical bone growth stimulator works in much the same way. It’s usually worth using one of these units for 6-12 weeks. What if using a bone stimulator doesn’t work? Bone grafting is one option, but a big surgery. Is there another way? Yes, newer stem cell based injection methods can avoid the surgery and use your own stem cells to heal the fracture. I’ve posted two videos below on the subject:

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