I "think" you should be alright with one day off, maybe 2.
As other's have said, it all depends on the person (pain tolerance, resistance to infection, etc.) as well as how bad the teeth are impacted. It sounds like your daughter's were quite bad
I had limited $ and no insurance for a while when I had mine pulled. I had 2 done at a time, the first time was the bottom 2 at 19 and the top a couple years later. Mine were growing in on an angle, pushing up the molars in front of them. I have a huge fear of dentists and put it off, dealt with the pain untill I couldn't anymore
(not the smartest move)
But I was fine with the removal...(only 1 was impacted) I had tylenol 3's which I only needed for a couple days, minor swelling and no bruises.
Is your job flexible enough that you could wait and see how he's doing tomorrow after the freezing wear's off, then if nessecary, take Tues. off?
How is your son's pain tolerance? Odds are he'll be fine while you work, he may be in pain but really there's nothing you can do for him in that aspect aside from filling the prescription, he may be sucky like most men are when sick/sore/etc (least most men I know turn into sucks when sick) but you could always call him from work to see how he's doing
I hope he recovers well from it, and everything goes smoothly.