nursing through the night

Yes. You just continue the same as you've always done. I was nipped 3 times and all 3 times were because i didn't unlatch him fast enough and he began to play.

What's the difference between feeding with teeth during the day vs the night? Babies still need to eat during the night, they're babies.

Yes, it is ok. But they say do not let the milk sit on the baby teeth, once he/she finish nursing to wipe the teeth with a damp cloth to avoid decay.

I mean because baby likes to stay latched on and nurse through out the night. My concern is him always having milk on his teeth.

My 2 year old was the same way. You just have to wipe his teeth with a wet cloth. My pedi told me to give him water at night. He wouldn't drink it.