Engineer develops sponge cleaning teeth 10x faster and better than toothbrushes

You've posted this quite a few times previously [0]. While reposts are okay, has anything noteworthy happened to the product over the years? If it really was good, why isn't my dentist telling me about it? Seems like a dud.

[0] https://hn.algolia.com/?query=https%3A%2F%2Fblizzbrush.com