The procedure of cutting the bone in a T shape, discarding the middle portion and then fusing the remaining bones of the chin together and trimming the line of the chin is the T-osteotomy for V-line surgery.
Using the t-shaped bone cutting, adjustment can be made for the ratio of chin tip and if the chin line is long or wide. In doing so trimming can also be performed. Moreover, the alignment of the chin from the rear and frontal view can also be made proportionate as well as the movement of the chin can also be adjusted.