[devX3]

From personal experience I need a regular cleaning every year and since I'm not cheaping out anymore on this as I did as student my teeth related health problems went to 0. I think it is useful if you aren't that disciplined with taking care of it yourself. I forget to floss every other time or simply forget to brush at times when I sit at a longer coding session and might eat during it but then forget to brush teeth afterwards. Procedure always removes plenty of scale/tartar.