The combined simultaneous anterior and posterior maxillary ostectomy has proved to be a useful method of treating skeletal open-bite. It is indicated primarily in patients with lip incompetence, excessive exposure of maxillary anterior teeth, long lower-face height, contour-deficient chin, and Class II malocclusion. Primary contraindications are the Class III skeletal open-bite and lip competence. We have used the procedure as routine treatment for many open-bites over the past 5 years since we first described it. Clinically, the results have been most gratifying, with marked improvement in facial appearance and stability of the open-bite correction. A preliminary study of stability following this procedure indicated good stability with regard to the vertical repositioning of the maxillary segments. A recently completed study by us on thirty-two patients treated with this procedure and followed for an average of 1.5 years showed excellent stability. This is by no means the only method by which open-bite may be successfully treated, but it is one more method to add to our armamentarium. The surgical procedure must be carefully planned and executed to attain the best possible results. Furthermore, the orthodontic procedures, particularly those involving vertical forces, must be provided at the proper time so that the surgical results are not compromised. Nevertheless, with proper planning, attention to detail, and meticulous execution, the results are rewarding.