Should I get an umbilical z-plasty after tummy tuck 2 years ago? (Photo)

I had a tummmy tuck over two years ago and my belly button and main scar did not heal well. My belly buttton keeps closing. I went to PS who specializes in revisions and she told me my options were to remove it or get an umbilocal Z-plasty. She explained what a z-plasty was but I can't find pictures of one anywhere so I'm hesitant to get that done. I just want to make a well infromed decision before I make a decisoon to remove it completely. I would like to see how big the scars are.