When people just try these operations, due to the limitation of instruments and lack of experience, in order to better expose the operation area, it is often necessary to cut directly from the skin of the face and neck to reduce the difficulty. This operation has many disadvantages. With the increasingly sophisticated surgical instruments, people's experience is gradually enriched. The above three kinds of commonly used face-changing operations can be completed only through oral incision, which greatly reduces the risk of surgery and the effect of surgery is getting better and better.

Take the operation of mandibular angle hypertrophy as an example. Traditional mandibular angle osteotomy includes intraoral incision, extraoral incision and combined intraoral and extraoral incision. During the operation, the coarse mandibular angle was removed by micro-pendulum saw, bone chisel or rongeur. These methods have their own advantages and disadvantages. For example, the incision in the mouth is hidden, and there is no surgical trace on the face, but the amount of bone taken is small, and the surgical complications are high (such as facial paralysis or local facial paralysis caused by facial nerve trunk or branch injury, massive bleeding caused by facial artery, external carotid artery and inferior alveolar artery injury, etc.). Take Korea as an example, the incidence of surgical complications is 3.6%. The complications of extraoral incision are relatively low, and the amount of bone removal is also large, but the incision is exposed and there is scar after operation. There is also a very dangerous complication of mandibular angle hypertrophy surgery through extraoral incision, nerve injury. Surgery may damage the mandibular marginal branch of facial nerve, resulting in paralysis of the upper and middle platysma, descending and decompression muscles, facial deformation (especially when smiling and other facial expressions) and asymmetry.

Intraoral incision is an ideal surgical approach, which will not leave skin scars, but it must reduce the surgical risk and improve the surgical effect. Now we adopt the oral surgical approach, and use the bone milling rotary file with sheath instead of sawing, drilling, chiseling and biting, which can complete high zygomatic reduction, mandibular angle hypertrophy, chin plastic and other operations with high quality and low risk. The core of this brand-new three-dimensional jaw plastic surgery, invented by China plastic experts, is to grind and shape the jaw in three dimensions by using the patented bone milling equipment invented by China maxillofacial plastic experts. Because the grinding range and bone removal amount of jaw are much larger than that of traditional osteotomy, the cosmetic effect of jaw is revolutionary compared with osteotomy. Because the use of pendulum saw, bone chisel and bone rongeur is completely abandoned, the surgical safety is greatly improved, and the incidence of surgical complications is only 0. 1 1%. This brand-new jaw plastic surgery has gradually become the standard surgical method to replace the traditional osteotomy (Korean osteotomy) in the international plastic surgery field.

Another significant advantage of this three-dimensional jaw plastic surgery is that it can be performed without general anesthesia, avoiding the risk of general anesthesia and the discomfort of laryngeal edema after general anesthesia. This operation can be completed under local anesthesia or intravenous sedation and analgesia plus local anesthesia without going through the recovery process after general anesthesia. In addition to not worrying about discomfort during operation, patients can completely avoid postoperative pain by using analgesic pump after operation. "analgesic pump" can give painkillers continuously and slightly within 48 hours after operation, so that patients can recover in a happy state after operation.

You can take off the bandage and leave the hospital five days after operation. At this time, the swelling of soft tissue in the operation area has not completely subsided, and the surgical effect only shows 80-90%. The best effect of the operation will not appear until half a year later.