Lip is stretched and white after stitches from dog bite - will I be able to regain my smile with time?

I was bitten by a dog. I need stitches on my upper lip and nose. While my nose has healed, my lip was more severe. The skin graft was done with the original skin that had fallen off during the attack. The surgeon stitched it back on but some of it didn't hold. Now, my lip is very white (the part where the stitches were)... my problem is that he stretch my lip so much to fit the skin that now, I can only smile to an extent. Will I ever smile as big as I used to??! Help please!!