The V-LINE technique is actually a means of central chin osteotomy and internalization of the lower edge of the mandible on both sides. I started this technique in 2005, summarized the information at the end of 2006, and published the paper in 2007. The paper was published in the Chinese Journal of Aesthetic Medicine in 2007. There is a detailed description of this technique and the precautions to be taken in my blog. In fact, I gradually began to abandon this technique from the beginning of 2008. This is of course because there are less invasive and more effective procedures. In addition to being more invasive, the most critical aspect of this technique is that the removal of the central chin bone block results in the loss of the chin lingual muscle, which is the original muscle of the floor of the mouth, and the attachment point of the chin lingual bone muscle, which has to be redrawn and repositioned to the chin. Otherwise, it can lead to a late posterior fall of the tongue root and induce snoring symptoms. Whether re-suspension and fixation of the muscle after loss of the attachment point will lead to changes in oropharyngeal function in the long term, I only have patients with up to 8 years of follow-up at this time, and the late follow-up is still in progress. Also, a few nitpicks for this mockup. First, the horizontal osteotomy line is too high and too flat. Below is a standard anatomical drawing of the chin hole region. More anatomical studies have shown that the course of the mandibular nerve in the neural tube is to make a corner forward and downward before exiting the chin foramen and then reflexing backward and upward to come out through the chin foramen as the chin foramen nerve. The area below and in front of the chin foramen is not an absolute safe zone; the chin nerve penetrates in the area 3.2 mm below the chin foramen and 3.5 mm in front of the chin foramen. If the osteotomy line in the mock-up is followed, the chin foramen nerve must be severed. Second, the central chin osteotomy should not be a square or rectangular bone block. Instead, it should be an isosceles triangle or trapezoid with the bottom edge on the lingual side. Otherwise, the lower edge of the mandibles on both sides will not be able to close after coming together in the center, and a large bone gap will be left behind.