Surgical are divided into three methods, in addition to the first use only grinding method, the other two are with the grinding bone and cut bone method. There are two methods of oral and oral outside surgery, both pros and cons have been controversial, but the oral surgery has been very mature, oral outside surgery has been eliminated.
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1.Grinding bone surgery
This operation does not remove the jaw angle, only the jaw angle and jaw body outer bone grind off, the thickness to grind off is limited, only up to 5 ~ 6mm,the improved effect is not obvious
Advantages: technology is simple, not easy to bleed
Disadvantages: limited effect
2. Angle Splint Osteotomy (ASO)
This operation also does not remove the jaw angle, with a knife method to remove the jaw angle and the outer body of the jaw body, retaining the bone marrow cavity and the inner bone layer, so also retained the original jaw arc; only reduce the thickness of the outer bone layer, change the magnitude is not big. In addition, because the inner bone layer is still there, the masticatory muscle still have skeleton support, masticatory muscle hypertrophy problem cannot be solved, so the improvement is usually not obvious, only suitable for a few people.
Advantages: to retain the original jaw arc, suitable for people who want to narrow the width and want to keep the jaw angle
Disadvantages: the improvement is limited, only the appropriate candidates have effect. Surgery using a chopper, the risk is still there, to choose the experienced physician because the incision of the bone marrow cavity, bleeding conditions need to control, there are coagulation dysfunction, anemia, or facial hemangioma are not suitable.
3. Angle resection
This surgery will remove the jaw angle, a greater range of change; and because the masticatory muscle loss of skeleton support will slowly shrink, but also partly solve the problem of masticatory muscle hypertrophy. Jaw angle incision position must avoid the bone marrow cavity in the lower alveolar nerve, it will not cause the numbness of the numbness of consciousness. And the curvature of the incision must be done with the chin to create a beautiful and coordinated jaw arc.
Advantages: significant changes in surgical range, part of the problem to solve masticatory muscle hypertrophy, jaw arc can be re-shaped.
Disadvantages: high technical difficulty, the existence of risk, to select the experienced physician, bone marrow cavity was cut, bleeding situation to be controlled, the surgery patient must be screened.
 

• 上切點：最高點不超過咬合面為原則。
• 定位點：保留寬度決定了定位點；定位點決定了手術結果。
• 下切點：不同定位點，得到不同的切點。
• 保留寬度：建議保留1.5~2.5cm
• 切除寬度：平均介於1.0~2.2cm

At present the mainstream approach is that the lower jaw angle surgery, combined with grinding bone surgery to moderate reduction the lower jaw body, and create a good curvature. Sometimes with the chin, to make the appropriate length and width ratio, you can get very obvious visual effects. Chewing muscles do not remove; people with rich skin fat, may also consider liposuction surgery, otherwise the effect will be worse. Most people do simple bone surgery can get good results. Single grinding surgery, the effect is very limited, poor satisfaction. Surgical risk is there, the choice of experienced physicians is very important; physicians must also do a screening check, remove those who are not suitable for surgery, in order to avoid dangerous situations.

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