And it turned out that this was the right thing to do. The dentist found the cause of the problem when nobody else could (my tooth was cracked!), and was able to treat it quickly. While others would've just put in an implant, this dentist kept most of the tooth intact by removing only a small portion. Now my gums have recovered, and I am able to chew with my own teeth.
When I first had part of my tooth removed, there was a little pocket between my gums and teeth where food particles would get stuck, so I started to use this.
Since then, my dentist has approved of my squeaky clean teeth. It's a must-have for me. I highly recommend this product.
I also have a portable version since I want to use it every day, even during my long overseas business trips.
There are quite a few Chinese versions of this available on Amazon that are cheaper, but I don't know much about them.
(The ones I'm actually using are earlier models, but they are no longer available, so I have posted a link to the newer versions.)