How Does a Sliding Genioplasty for Chin Length Heal?

I am interested in getting a sliding genioplasty to improve lack of chin projection and more importantly lack of chin length. I am curious how this heals though. I am aware that the bone is anchored with a titanium plate, but will new bone grown in between the cut bone, even in a lengthening sliding genioplasty? I am assuming there will be a gap. Also, if bone does grow in between can you have the plates eventually removed? Thanks!