Body-Mend homeopathic helped me with an extraction just fine. Cold and warm compresses help as with most injuries of this type. Clove oil numbs the area nicely for any tooth pain.
As for eating after oral surgery, I use a blender to puree everything: smoothies, soups, stews, salads, etc. Whatever you normally eat, just blend and sip and swirl to coat with saliva. Do not use a straw for the first few days because that can undo stitches, I am told.
On the oral surgery, make sure that they do the surgery correctly to prevent cavitations (
http://www.wholebodymed.com/library_education_details.php?pid=10).
Good luck!