"A toothbrush is an oral hygiene tool used to clean the teeth, gums, and tongue."
https://en.wikipedia.org/wiki/Toothbrush
"An electric toothbrush is a toothbrush that makes rapid automatic bristle motions, either back-and-forth oscillation or rotation-oscillation (where the brush head alternates clockwise and counterclockwise rotation), in order to clean teeth. Motions at sonic speeds or below are made by a motor."
https://en.wikipedia.org/wiki/Electric_toothbrush
"dental laser to remove plaque and tartar buildup. The light energy coming from the laser breaks the plaque and tartar gently from the patient’s tooth. In effect, the gums and teeth do not undergo an intensive process."
https://endingaids.org/laser-dental-cleaning/
"Mortal Oscillatory Rates (MOR) are the frequencies that Royal R. Rife proposed would allow a user of his Rife machines to kill the specific micro-organisms responsible for disease in their host."
https://hatch.kookscience.com/wiki/Mortal_Oscillatory_Rates
"Plaque is a sticky film of bacteria that constantly forms on teeth. Bacteria in plaque produce acids after you eat or drink. These acids can destroy tooth enamel and cause cavities and gingivitis (gum disease).
Plaque can also develop under the gums on tooth roots and break down the bones that support teeth. Untreated plaque can harden into tough-to-remove tartar."
https://my.clevelandclinic.org/health/diseases/10953-plaque
"A number of different bacterial interactions within plaque biofilm have been discussed. In the last 30-40 years, a vast amount of evidence has been published to suggest that bacteria are the primary aetiological agents of periodontal diseases."
https://pubmed.ncbi.nlm.nih.gov/15143484/
"Normal cells should not be affected by the virus-killing lasers or sound waves because they have resonant frequencies much lower than those of viruses, Sankey said."
https://www.livescience.com/7472-kill-viruses-shake-death.html
"The frequency of the ultrasound is tuned to the resonant frequency of calcified plaque, thereby shaking up plaque"
https://www.medgadget.com/2018/04/shockwaves-s4-catheter-shakes-calcified-plaque-off-peripheral-arteries.html