You would have to provide current pictures from different angles to best answer your question. But I doubt that a maxillary impaction and a chin procedure alone would produce a square jaw look. This excludes the back part of the jaw which often is the key element in making a square jaw look.
If I am getting your question right, you are mentioning 'labiomental groove'.
this groove is defined as a groove between lower lip and chin.
There are several causes for deep labiomental groove.
Sometimes it is caused by micrognathia, and malocclusion ( your overbite may be one cause.)
In some...
I perform regularly all kinds of genioplasties, not only sliding
genioplasties but also one, two and three-dimensional augmentation
and/or reduction genioplasties, plus other custom designs; in other
words, I know well what I am talking about.
Your case is the among the best you can meet...
