In the US most visit that person twice a year. They have that ultrasound machine, but they only use it on people who don't visit that often - the machine just gets the build up do the point where manual tools can finish the job. If you brush/floss and visit regularly the manual tools are all they need.

In this was at least it looks like the US system is better. Of course there is no way nuance can be expressed in a short forum like this, but maybe you need to look at the Finland system to see if it is really good enough.