Toilets represent the expression of your emotions. For example if you can’t find a toilet then you’re unable to express an emotion that you need to get out. Exposed toilets like the horrible group toilets all in one room with no walls or doors between them (I have this happen in dreams far too often) represent feeling very exposed emotionally or being uncomfortable emotionally. One time I came across toilets like this IRL and freaked out. Thankfully they were just being repaired and there were other private toilet cubicles to use.
Dirty filthy toilets depend on how you react to them. For example if you feel unable to “use” the toilet because it’s so dirty then it’s being unable to express your emotions because of some issue.
Fifty percent of the time dreams about teeth are reflecting real life worries about your teeth so if that’s the case go get a check up or get that filling done so you can stop dreaming about them. They can also represent financial worries.