I had my wisdom teeth out earlier this year, and I wound up with a muscle spasm that gave me quite a bit of trouble for about a week or so.
I didn't eat anything for the first 2 days, but then I was ok with soft foods like hummus, guacamole, mac n cheese, soups, yogurt (with milled flax seeds), ice cream (I ate a few pints of soy delicious), soft fruits like bananas and avocado, apple sauce... etc.
Smoothies, milkshakes and soups that you can drink can all pack in the calories.
It takes work, but I managed to get at least 1200-1400 cals a day without actually chewing.
Lokah Samastah Sukhino Bhavanto
'May everyone everywhere be happy
May the whole world be joyous'