Swelling Wont Go 1 Year After Bone Graft Upper Maxilla? (photo)

I had bone taken from my hip and placed in my upper maxilla. i am 21, i was involved in an accident where i lost 5 of my teeth and most of the bone on the right side of my upper maxilla. i looked fine after the accident except for the missing teeth. I decided to get the bone graft for the implants. the surgeon used abdominal muscle to act as the gums covering the implant. its been one year since the operation a lot of the swelling has subsided but there is still a noticeable amount on my cheek.