Seeing broken teeth in dream is considered bad as per dream interpretation and meaning. Teeth breaking dream is also an indication that in near future you can expect some kind of accidents or relationship issues.
You find the broken teeth with blood then it is a sign of some kind of illness or bad happenings in the family.
Just only seeing broken teeth means there will be accidents.
Some people rarely have seen dream of swallowing broken teeth this means the person will successfully overcome all the problems.
Please note that the dream has to happen naturally. If the dream happens after having some teeth related scene during day time then it has no value. The dream is merely an extension of the daytime activity.