yes arh~~~you are wrong...but endo treatment 杜牙根 will make the teeth become weak.
and you can't be use that teeth to bite hard things...otherwise it will break.....
go to do la.......牙瘡 will make that teeth loosen, the teeth may be come out several year later if you don't treat it (but depend on situaration).....By the way, 牙瘡 = inflammation.......which make you discomfort, right?!