I found that after the teeth cut through Jason settled pretty quick, even though some of them are fully out to their proper size, iykwim?
The teething signs sometimes come and go (he's teething again at the moment and I can feel a big lump of a molar under the surface, oh joy) but often he does the night wakings right up till they cut through -however, Jason tends to get teeth in batches. When he was 8mo he got 4 teeth in one week and 2 the next so that was not a fun time in our house!
I found though that whilst he got the other signs (drool, runny nose, nappy rash) on and off the night wakings got worse the closer he got to popping the teeth through.