Books by Steven G. Fox include the following two books:
It’s Like Losing Something Personal
What does losing a tooth in a dream mean?
The main commonality I have found in dreams of losing a tooth is that the dreamer lost something recently of personal value. It can be a possession, relationship, job, reputation, or even a personal quality such as “losing your bite” with people. It is usually a personal loss that you do not like, but is something you can deal with similar to how you feel when you lose a tooth.
Gain personal knowledge through dreams at
L.Z. Marie does an excellent analysis of water’s symbolism.