So, my story takes place in a yet to be determined modern American city, and basically the main character ends up with a cut starting at the corner of his mouth and going about 2 inches across his cheek. It's done with a box-cutter in unhygienic conditions, and it will be several hours before he can get treatment for it. (Maybe longer? I'm not sure if that would be plausible or not) Since the only medical care he has access to is a kind of shady mob doctor, it's going to scar up pretty nasty.
I've already found some resources on how to patch him back up, but I can't find any information about the healing process. How long will it be till he can do much talking? Would it be likely that he would have a slight speech impediment? Would he have to go on a liquid diet, and for how long? Also, how long would the stitches need to stay in for? I've had some luck googling facial oral lacerations, and I've also tried searching for things related to Glasgow/Chelsea smile/grins.