Prep for Toddler's Dental Surgery

In about a month, our daughter wiil undergo dental surgery to repair her upper front teeth. Some teeth may need to be pulled and rebuilt. For the surgery, she wil be "put out". We were wondering what would be some good things to do before and after the surgery, to make sure she stays optimally healthy (e.g. supplements, homeopathic remedies, etc.). Any help would be greatly appreciated. Thank you.