L.L.
Mine didn't sleep over 6 hours until all his teeth came in. There was nothing we could do until those last teeth came in and, boom, he slept. If he already has his teeth, you may want to try new bedtime techniques or routines. No Cry Sleep Solution forToddlers is a good one. There are a lot of different ideas. One that worked for us was the "sleep fairy" who would deliver gifts for children who slept through the night. They were just dollar store nick nacks, but they worked. Take a look at the book and see if there's anythign that might work for you.