4 ms·
FYI, at least one review of multiple studies have shown that ultrasonic tooth brushes are no better than sonic toothbrushes. https://www.ncbi.nlm.nih.gov/pmc/a
by AaronM 4y ago
FYI, at least one review of multiple studies have shown that ultrasonic tooth brushes are no better than sonic toothbrushes.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7175112/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7175112/