Yes, TartarEnd toothpaste has been shown to remove pre-existing tartar when used twice daily with a high-amplitude sonic toothbrush. If you start using TartarEnd within a few weeks to a few months after your last hygiene appointment, you may have trace levels or no tartar at your next appointment. If you have built up tartar for six months or more before starting to use TartarEnd, it may take months to remove most or all of it.  New layers of tartar form each day you use ordinary or other tartar-control toothpaste. Thus, in six months, there could be 180 layers. TartarEnd will remove a few layers of tartar each time you use it. It will also loosen the bond between tartar and tooth enamel. Some users report chunks of tartar breaking free for tooth enamel while brushing or flossing.   To better understand how TartarEnd works, imagine removing 30 layers of paint from a piece of wood. An excellent paint remover will soften and remove a few layers of paint each time you apply paint remover and scrub away the softened paint. Each time you reapply the paint remover newly exposed layers of paint will be softened and removed. Soon, you will see the bare wood surface. TartarEnd toothpaste works in a similar manner, but it dissolves and softens tartar and plaque so they can be removed with a high-amplitude sonic toothbrush.