How do they remove the step off in vertical reduction genioplasty

[moze]

I would like to do a genioplasty and can i know how they prevent step off when they reduce vertical height?

 

[marigold]

they can just shave it but if it's a small movement then it shouldn't matter too much, not really noticeable+ gives the mandible to chin a nice contour and transition from the side

 

[moze]

they can just shave it but if it's a small movement then it shouldn't matter too much, not really noticeable+ gives the mandible to chin a nice contour and transition from the side

Does shaving cause sagging?