Before toothbrushes there was miswak or any various types of sticks the ancients used to keep their teeth clean.
Some benefits of miswak:
Plaque reduction & preventing
Teeth whitening
Shielding teeth from microbes
Help to eliminate toothaches
Eliminate bad odour
Freshen the mouth naturally
Creates natural mouth fragrance
Killing bacteria
Increasing salivation
Stimulate the flow of saliva
https://familybeauty.fridaskincare.com/49-mind-blown-health-benefits-of-siwak-miswak/