The breakthrough that transformed toothpaste into the crucial weapon against tooth decay was the finding that fluoride could dramatically reduce cavities.
(The breakthrough; transformed; toothpaste; into the crucial weapon against tooth decay) (The breakthrough that transformed toothpaste into the crucial weapon against tooth decay; was; the finding that fluoride could dramatically reduce cavities) (fluoride; could dramatically reduce; cavities)
The breakthrough The breakthrough that transformed toothpaste into the crucial weapon against tooth decay fluoride
transformed was could dramatically reduce
toothpaste into the crucial weapon against tooth decay
the finding that fluoride could dramatically reduce cavities
cavities