Hi Daniel,
I am assuming that you suffered an anterior dislocation...when this happens, the ligaments that hold your arm in place are ruptured and the arm is more likely to suffer a recurrent dislocation. I would suggest seeing a physiotherapist who can advise you on strengthening your Wikipedia reference-linkrotator cuff muscles. These should offer you more stability and reduce the chance of your arm dislocating again.

www.massagemuswellhill.co.uk