The first aid fixes people have mentioned are just that and should only be used as such, quite a few of them contain clove oil which is great for short term use but long term will affect the vitality of the nerve. They also lack the strength to stand up to long term use, eating can be hard on them.

Any restorative action will need a dentist as the rot will undoubtedly penetrate way past any individuals ability to deal with it themselves, to get a good seal the rotten protion of tooth will need removing before the filling is applied.

If a tooth falls out, then put it in a glass of milk and take it to a dentist for it to be reinserted, but this needs to be done quickly, a matter of hours, or the pulp in the centre of the tooth dies and it becomes a waste of time. The only other way whole teeth can be reinserted as such is for a post to be embedded in the jaw and the shell of the tooth fixed to it, this is not always successful and may lead to bone loss and weakening of the jaw in the area around the post. Also expensive.

Unless theres an abcess or similar infective process antibiotics are not normally required for dental treatment, at least in the UK. Learning how to brush properly is more important thank most people think, as is regular replacement of the tooth brush.

Cheers

Sledge