Fixing a wide jaw and uneven chin? (Photo)

You can accentuate the jawline with the augmentation from the chin to the angles. A genioplasty gives the most complete control of the chin area; the mid section and the angles require augmentation materials and will nicely change the outline of the jawline. 

While most forms of chin augmentation will potentially deepen the labiomental groove, adding a vertical component to the chin augmentation will add some 'protection' from it. Vertical lengthening of the chin can be done by a vertical lengthening chin implant or a sliding genioplasty, each with...

Both operations can produce nice results but there are pro's/ con's of each.A chin implant does not increase vertical height like a genioplasty can but I do not think that you need a vertical improvement.  A chin implant is generally less expensive and a more common approach but a well done...