The length of time for an alveolar bone protrusion surgery depends on the size of the surgical incision. Generally speaking, if the apical bone revision can accomplish the task by tapping, it will only take about 5 minutes of time. In the case of a bone prominence revision, the bone prominence is just a single one, as the flap needs to be flipped to complete the surgery, then debrided, smoothed, and finally the mucoperiosteal flap has to be reset for suturing, and the surgery may take from ten minutes to half an hour. It also depends on the size of the number of bony prominences or tips, the more the number the longer the time naturally. After all, osteochondral revision is a surgical procedure that requires appropriate preparation before and after surgery, especially in conjunction with preoperative screening for cardiovascular and cerebrovascular diseases, as well as systemic diseases, such as diabetes and liver and kidney problems, in each patient, especially in middle-aged and elderly patients. After these problems have been ruled out, the preoperative preparation may require the use of appropriate testing equipment and medications. If this is included in the length of the operation, it will take up a significant portion of the time and naturally lengthen the duration of the operation.