When I was a child, I brushed my teeth with toothpaste. My parents did not use paste. Instead they used Calox Tooth Powder. A small amount of this was sprinkled into the palm of one hand and then mixed into a paste using the wettened bristles of a toothbrush. The resulting gritty paste was then used to brush the teeth. I have no idea why my parents used the powder, but made us use toothpaste.
Many decades later, this year, I visited the Indian city of Pondicherry, which was a colony of France until 1954. We stopped at a tea stall that in addition to providing tea also sold small packets of paan and chewing tobacco (not very good for oral health) and packets of ‘Gopal Toothpowder’. Seeing the latter reminded my of my parents and their use of Calox. I asked the vendor how the tooth powder is used. He opened his mouth and rubbed his finger along his teeth. In his opinion, no brush is required. I bought a couple of packets, but have not yet been adventurous enough to try to use their contents.