We have tested three Megasonex M8 toothbrushes with different heads and tongue scrapers (can be purchased separately). This is a very detailed review not only testing the product itself but also explaining well the science behind ultrasound cleaning and answering a series of additional questions in the Q&A section. Please note that there will be also an additional article on ultrasound technology in dental applications as well. There is new Megasonex M8S model available, we will test it soon! Disclaimer: this is NOT a sponsored article or any kind of an editorial - we have purchased our toothbrushes on our own and their manufacturer did not interfere in the review…