Re: Degenertion of the sternum
Inflammation of the sternum is called costochondritis.....this is probably what you are talking about. comes with many forms of arthritis. As does arthritis of the collarbone where it joins the shoulder blade at the shoulder. It's called the AC joint, short for the acromioclavicular joint.
There is an entire board here for costochondritis..it is that common. a good place to find info and ideas on how to control the pain.
As for the AC joint problems, you could try the Shoulder/Rotator Cuff board or see who can help you here. I've had it and have had surgery on both my AC joints to remove the ends of the collarbones to relieve the pain. Until you get that bad, there isn't much they can do. maybe some have some newer treatments to share.
If it helps, these are pretty normal problems that go along with osteoarthritis. Sad that I can say that. Anti-inflammatories help but I've used heat and ice and changing how I do things as a way to cope. Sometimes with the costochondritis, something as simple as changing how you sleep can make a lot of difference. Cortisone shots into the AC joint or the bursa below it can give some relief. If the collarbone dislocates at the sternum from chronic inflammation, there is nothing they can do about it. Doesn't respond to treatment either and they can't inject there. Can't put it back either once it dislocates.
So what did your doctor suggest for this?