Because the results of rhinoplasty depend so heavily on the precision, experience and artistry of the surgeon, not every procedure is a success. Anyone who has ever leafed through the pages of a supermarket tabloid knows that fact: Sometimes even the richest celebrities in the world end up with surgically-altered noses that are not improvements at all. In cases like this, revision surgery is often necessary. Dr. Galiano excels in rhinoplasty revision, correcting the procedures that were performed by other surgeons.    The first step is to wait until about a year after the first rhinoplasty, after inflammation of tissue has dissipated. Not only will this give you a better sense of the final appearance of the nose, it will also give your tissue time to heal, before it is once again subjected to incisions and reshaping. In some limited situations revisions should be performed earlier, however. Serious structural damage that occurred with the original surgery, such as pinching, twisting, retraction or a partial collapse, can become more serious and harder to operate on the longer you wait.