Tooth decay is the most common global disease but toothbrusing cannot reach inside pits and fissures in grooves on chewing surfaces of back teeth where over 80% of cavities occur. Who makes the most toothbrushes and how many? Who markets the most too

Tooth decay is the most common global disease but toothbrusing cannot reach inside pits and fissures in grooves on chewing surfaces of back teeth where over 80% of cavities occur. Who makes the most toothbrushes and how many? Who markets the most toothbrushes and how many? Has anyone any contacts in the toothbrush industry?