Extracorporeal septoplasty details? Since cartliage doesnt reattach itself to the bone, how is this area kept in place?

My doctor performed a extracorporeal septoplasty to gain width in bridge for my rhinoplasty. I cant seem to find much info on this procedure, except that it involves taking out the upper lateral cartilage and placing back in. Since cartliage doesnt reattach itself to the bone, how is this area kept in place? Is the centre cartilage somehow reattached to the keystone area? I also hear dissolvable sutures are typically used although what happens once they have dissolved? Thanks you