I started researching baking soda for teeth and initially this is what I wrote in response: Okay, so I looked into baking soda, and yes people do use it as an alternative to toothpaste. It's apparently good for whitening your teeth. However, dentists aren't in agreement about whether overall it's good for your teeth or not. Some dentists say it's not good because it's too abrasive and can wear out your teeth enamel. To be honest, this makes sense to me because baking soda can be used to clean grime from toilet bowls - so it has an abrasive element to it. And seeing as out teeth has different layers, the first layer being enamel, which is a protective layer, I don't think it's worth the risk to use an abrasive ingredient on your teeth. I've read that it may also be to abrasive for your gums.
But then I decided to research more and found mixed opinions about whether baking soda is too abrasive or not. BUT THEN, I found an article that basically talked about findings from studies conducted in the past and as recent as 2008, where it was basically concluded that brushing your teeth with TOOTHPASTE is in itself too abrasive - that toothpaste is actually a leading contributor to teeth wear and abrasion. The article also had responses from people who were saying they agree and that they brush with plain water and they have better teeth than people they know who use toothpaste.
In light of this information, I'm of the mind that any chemical that is abrasive is not good for your teeth. Apparently using a hard or soft toothbrush doesn't harm your tooth enamel, but if you brush too vigorously and using too much pressure then you can damage your gums which will in turn damage your teeth.
I'm pretty convinced now that toothpaste is not good for your teeth and I'm not going to use it anymore. I'll just brush with water, floss and use mouthwash. I'll still keep an eye out for other safe solutions - I haven't checked out xylitol toothpaste yet but I will.
Here's the link to an article about toothpaste being bad for you: http://www.huffingtonpost.com/suzette-standring/too-much-toothpaste-dama