Depressica, I use this stuff currently:
It's a green powder. It takes some getting used to after you have been using toothpaste your whole life. But it's amaaaaazing.
Here is a page with some general information about oil pulling:
http://www.oilpulling.org/oil-pulling/
Don't listen to the skeptics out there (there are some, for whatever reason). Oil pulling is a powerful healing tool and it's probably the best thing in existence to clean and heal the mouth.
I have really bad tooth problems. I grew up drinking nasty fluoridated water which left my teeth all brittle and full of holes, among about a thousand other health problems but that's another thread. (I now only drink pure water). By age 23 I almost died when a gum infection began spreading through to the rest of my body and by age 26 my enamel was mostly gone from my teeth. There was no protection at all, I'd eat something cold and scream in pain, I'd eat some fruit and the acids would eat holes in my teeth. Literally, I still am working on healing a visable hole in the front of my tooth that showed up after one acidic meal.
Just to give you a bit of background so you can know how powerful all this is...
But anyway, at that point I knew I couldn't live that way and had to do something. I gave the dentist one last shot, and all they did was try and coat my teeth with some powerful fluoride gel which burned and did jack shit to help, I realized then that they weren't going to help much so I began reading about reminerilization (can't spell that word) and how to heal the teeth. I already knew about oil pulling and had done it a bit before so I decided to go back into it with my full efforts again.
It's only been a few months and I am able to eat most foods, including apples (when before even biting into an apple caused me excruciating pain). And I'm happy to report that after TWO DAYS of oil pulling with sesame oil and using the tooth powder instead of toothpaste, the hole in the front of my tooth began filling in with new bone.

It's almost completely gone now and it was a hole big enough to stick my tongue inside before.
So yah, the basic routine is, wake up, oil pull (you have to do it on an empty stomach or you will vomit up your food for some reason-I didn't believe this was true my first time and was proved incorrect). While I'm oil pulling I dry skin brush (gets the circulation going and exfoliates dead skin cells off)
http://www.naturalhealthtechniques.com/healingtechniques/dry_brushing_technique.htm
Then, I usually have a good shower, and the only product I use is Dr. Bronners Magic Soap
^which is the best soap in existence imo. Contains no toxic chemicals, etc.
After my shower I'm ready to spit out the oil and that's when I clean my mouth really good with the tooth powder and finish with a sea salt rinse.
I literally thought I'd never be able to eat anything but warm, mushed up foods again and my teeth are almost like a normal person's now, from doing this routine. After years and years of suffering. I will tell anyone I know about oil pulling because oral health is so important to overall health.
It's not frequent brushing that erodes tooth enamel, it's bad brushing techniques and abrasive toothpastes.
Yep, I brush every day now. It's important. It's any toothpaste that contains glycerin. Glycerin coats the teeth and stops them from remineralizing. My teeth are proof of this. Years and years of them getting worse and worse and then within a few months they are healed like 80% after stopping the paste.
People with naturally strong teeth probably don't have the worry about it. I still buy my boyfriend natural toothpastes *even the natural ones would be bad for me because they still have glycerin* because he doesn't have teeth which were already falling apart/eroded and sensitive.
But for anyone looking for extra special help, get the powder. SOme use baking soda and peroxide instead of toothpaste but the baking soda was too abrasive for me and made my sensitivity worse.