Loosening of a prosthesis is another potential risk in total joint surgery. Loosening may occur in any one individual component or occur in all the components. The occurrence of loosening in a total joint replacement is approximately 1% per year in our experience. Loosening of a prosthesis is not usually a sudden occurrence, but a gradual process, characterized by increasing discomfort. In most instances, if a prosthesis becomes loosened, it can be corrected by another surgical procedure.