I think it is performed mainly to increse prominence including increasing anterior projection (moving bone forward and horizontally). When the zygomatic arch and maxilla is cut (inculding orbital rim), little force is used to break upper parts and orbital floor and then the bone is moved a little outside and can be moved forward (that MM told me), giving this projection. This is (I think) limited only for a cases which do not require big reposition, I guess max 5mms (mainly horizontally), to avoid significant orbital volume change which can result in sunkening of the eye (but I can be wrong, or in other words, more advancement requires orbital floor augumentation)
Unfortunately I never seen such case, and when I was on the consultation with MM 6 months ago, I was so enchanted by his popularity, experience, good opinions (before I registered on this forum) so I even did not ask much about examples. I know it's stupid, but that was my first consultation abroad, and he was first surgeon who said that he could help me. Now I know what to ask , etc. I had to learn this during these 6 months
but this trip last too long for me
But you have to know that, MM during this surgery can damage your zygomatic nerves and you will "suffer" some loss of feeling on the side of the cheek (he told this is very likely). However most people are not sensitive for such disadvantage. It is no problem for them (I've been told that)
I now realised I should also take this "sandwich" into account. However I do not know any surgeon except MM who does this. AND YOU ?