Using Ear cartilage for a Rhinoplasty

I need a revision rhinoplasty and was told that I would need cartilage taken from ear to be used for a graft. Is this common and is the ear negatively impacted in any way from this? Also, where exactly on the ear does the cartilage come from, will it look like a chunk of my ear is missing?
 
Ear cartilage is a very nice source of cartilage for certain areas of the nose during rhinoplasty or revision rhinoplasty.  Septum and ribs are other sources.  Some surgeons make the ear incision in the front.  I prefer usually making it in the back so its nearly invisible.  The cartilage usually comes from the bowl of the ear and it should not result in major changes in the shape of the ear.  Sometimes the cartilage comes from an area in the front of the ear when composite grafts are needed (grafts of cartilage with skin also attached.)