I guess what it really comes down to is that those of us who have ever nursed a child through a long night, just before the emergence of a new tooth, are willing to try ANYTHING if there's even a small chance of future prevention... therefore something as simple as wearing an amber necklace is worth a try. What could it hurt, right? And they look pretty sweet to boot!!
Below: my little man in his fancy "Green" amber necklace!