Does the Sonoshine device I saw advertised, safely and effectively remove calculus, plaque, and tartar from teeth?

This is effective as claimed, although not all will be adept in using it to maximum effectiveness and efficiency. It is difficult to use a product like this blind, meaning that you cannot see all of what you are doing, compared to a dental hygienist using a dental mirror and close observation to inspect the surface of the teeth from every angle and applying an appropriate removal process for the buildup of any deleterious coatings that can lead to tooth decay. But this will improve dental health and hygiene through homecare and that can only help to keep a worsening of things from happening.