If the anterior protruding teeth are not pinned, the distance the anterior teeth move backward or backward is relatively short and the resolution of the protrusion is relatively small. When the nail is placed, the front teeth can be moved backward to the maximum extent by the traction of the nail and can achieve a relatively straight face. If the nail is not put in, the front teeth may be able to move backward, the distance of movement is smaller, and the possibility of improving the protrusion is smaller. There is another situation, such as the gingival smile, the front teeth show a lot, but also to reveal part of the teeth, also very ugly, the traditional orthodontic methods without pegs, the upper teeth depressed is very difficult. An implant-supported nail is placed in the anterior region to depress the upper teeth upward, and the gummy smile is solved very well. The traditional orthodontic method is very difficult to depress the teeth, but it is very easy to depress the teeth with a localized nail to solve the problem of locking.