All orthopedic surgeons should have an in-depth knowledge of all your problems. That's what they do. However, some will take a special interest in knees, shoulders or whatever. Sometimes you can look on a practice's web site and they'll have biographies of their doctors and their special interests.
There's really only so many forms of treatment when it comes to orthopedic issues. There's anti-inflammatories, cortizone injections, physical therapy and surgery.