First of all, it is clear that mouth-opening operation is a kind of operation to correct bimaxillary deformity and malocclusion, while chin operation is a kind of operation to improve the poor appearance of chin. Whether the two operations need to be done together depends on the individual's facial condition, and there is no mandatory binding principle, so there is no question of whether the chin will become longer after the mouth-opening operation.

Convex operation is to push the maxilla surgically under general anesthesia. This operation needs to be performed with the teeth. It is generally necessary to pull out the upper and lower four teeth at the back and use this space to push it in. In order to achieve the surgical effect of improving mouth protrusion. Another obvious advantage of convex mouth correction is that it can visually improve the chin retraction.

If the chin itself is relatively long, accompanied by the problem of protruding mouth, Korean hospitals will choose chin plastic operation at the same time as the operation of protruding mouth. The purpose is to correct the poor appearance on the one hand, and the overall good-looking face shape is the ideal facial state on the other hand ~