Some things I have heard from dentists:
Before removing a tooth, you will be given a strong antibiotic course and it will continue after removing the tooth. When removing a tooth, by any chance some germs go in, your body is ready. - ehema karrada?
If a nerve filling is done, afterwards a crown has to be put on the tooth. If not done, the tooth will decay and break because after nerve filling there is no blood supply either. - meka harida man danne naa.
If a tooth is broken and rotted a lot, it has to be removed. A crown can not be done. - harida waridida man danne naa.
Any infection very good to cure fast. if it gets to the jaw bone, very difficult to cure. Can affect brain too. - ??
In addition to brushing, good to gargle mouth with mild salt water every night - hoda adahasak wagey.