There are risks of any type of surgery which includes bleeding, blood clots (deep vein thrombosis), infection and anesthesia complications as well as risks related to the procedure itself including nerve injury (peripheral neuropathy) and blood vessel damage. The most common problem associated with a shoulder replacement occurs when parts of the replacement implant wear through the soft tissues holding them in place. The resulting loose implant will cause the shoulder joint to collapse and limit motion of the arm. The solution to this is to do a revision surgery that re-attaches the shoulder replacement mobile parts into solid bone.