If he's eating, walking and behaving as is normal for him then just keep an eye, do check his teeth again in a few days as sometimes they break below the gum line or the fracture is to tiny to see. About 2 weeks ago one of my boys fell out of his hutch about 3 foot down and landed right on his nose. He did break a tooth, which had snapped below the gum line, so it wasn't until a few days later that I noticed his tooth was broken. Thank fully as long as there is not damage to the root or jaw then teeth grow back super fast.
We've all at some point accidentally dropped a pig, or maybe not supervised well enough and they have had a fall. It happens unfortunately, so please don't feel to guilty!