It is necessary that the proportion of your lower court in the face is harmonious, that is to say, the proportion of your chin cannot be less than 1/6, and there is no serious retraction. It's just that the shape of the chin is not good enough, such as flat chin and apple chin. In this case, the use of autologous fat filling, more is to reshape the chin, so that the overall contour of the face is more refined and beautiful.
If you simply want to use autologous fat to prolong or improve chin retraction, even if it can be done technically, the surgical effect is not ideal. It's easy to have a "chin up".
Therefore, in this case, it is more appropriate to choose prosthesis or comprehensive facial plastic surgery to prolong the chin and improve the shape of the chin.
It is easy to understand how to insert a prosthesis. In addition, there are many forms of chin prosthesis now. Only by choosing the one that suits you can you achieve good results. It is more suitable for beauty seekers with poor jaw development and obvious retraction.
Comprehensive facial plastic surgery is to lengthen and reshape the chin through osteotomy and reorganization. It is more suitable for beauty seekers with wide mandibular angle and short chin.
In short, no matter which way, meet as many people as possible and choose the one that suits you!
I hope my answer can help you.