My 2 yr old fell and knocked two front teeth loose still has a lot of bone and root just broke one root off tooth will tighten up how long ?

See dentist: Your 2 years old with loose front teeth may come out any time, but there is chance of loose teeth may come out during sleep and may slip in to wind pipe or in food pipe .It is better to see the dentist at earliest to get the teeth examined and treated as advised

Pediatric Dentist: Call a pediatric dentist for an emergency appointment. It is impossible to tell over the internet what damage has occurred. Fractured teeth may need to be extracted, damaged teeth may need to be restored. Please call now.

Immediate attention: This situation is very serious situation that should be immediately addressed by a pediatric dentist. There are so many variables that could adversely effect your 2year old's health, you need to act. Also, your child's permanent teeth need to be evaluated thru imaging to assure they are healthy. And finally, you should see if your child's appearance can be restored for their self esteem.

See dentist asap: as this is a serious dental problem that needs immediate attention.