Huh so that's interesting. What you're saying is that the small mandible is the problem. And we can grow the mandible with chin wing (for me it would be a second procedure since I already have had a bsso and genioplasty).
If I have a chin wing it will be like a second chin wing to my now bigger mandible and chin, right?
But how to increasing the volume of the chin wing change the position of your MOUTH??
And how does it increase more volume to the inside of your mouth???
Does chin wing affect the interior of your mouth as well? I thought it was wholly an external cosmetic procedure??
The IMDO can grow a smallish mandible in all three dimensions. But as far as I know only in children.
Chin wing does not grow the mandible. It can move the border of the mandible in all three dimensions. This can make the mandible to appear to be larger, as the border of the mandible kind of strains the soft skins. Think of the mandible border as sticks which strain up a tent of soft skin.
As far as I know you can have a chin wing after BSSO and after genioplasty. But your nerve has to be within certain limits (otherwise cutting the mandible border might injure your nerve).
Chin wing will not change the position of your mouth. And it will not increase the space inside your mouth.
You are right, chin wing is a wholly external procedure.
But it has a medical effect, too: it can help to increase lip competence.
Background: there are many people out there who had a big overjet and got treated by camouflage orthodontics. They have now a good occlusion at the price of lower front teeth flared out forward.
These people often have lip incompetence which leads to mouth breathing and permanently dry lips.
They can't get a BSSO because after camouflage orthodontics this would give them a negative overjet and basically mess up the whole bite.
Genioplasty or chin wing can help with the lip competence then, and give a Class I mandible border for the aesthetic result.
Hope this helps!