The labial tooth relationship and nasolabial angle of maxillary protrusion are two important reference indexes for designing maxillary surgery. The ideal relationship between lips and teeth is that the cutting end of upper incisors is exposed 2~3MM below the red edge of lips. Too long or too little will give people an unpleasant feeling. The ideal nasolabial angle is between 90 degrees and 1 10 degrees. The nasolabial angle of patients with maxillary protrusion is often acute, and the upper lip is tilted upward and short. Select the appropriate osteotomy method according to the amount of maxillary retraction and upward movement.

In maxillary protrusion deformity, true maxillary protrusion is rare, but maxillary anterior teeth and alveolar protrusion are more common. The performance is: the upper jaw protrudes forward, the lips show teeth, the lips can't be together in a natural state, and the gums are exposed too much when smiling. Often accompanied by mental withdrawal. The upper and lower front teeth are often inclined to the lips, and some are accompanied by uneven crowding. The front teeth are covered deeply and the width between single canine teeth on both sides is insufficient. Maxillary protrusion is mostly caused by congenital factors, mainly genetic inheritance or fetal influence in maternal environment. Correcting maxillary protrusion can effectively improve the relationship between lips and teeth and restore the natural appearance.

Drainage 24 hours after maxillary protrusion correction can restore normal working life within 1 ~ 2 weeks; Pay attention to the way of eating after the incision in the mouth, avoid eating, and try not to open your mouth; It usually takes 5 ~ 7 days to take out stitches.