Abstract: An improved dental floss dispenser is provided and consists of a roll of waxed dental floss having a shaft that is rotatably supported in a chamber of a container with a quantity of powdered baking soda. Spring biased perforated sandpaper in the bottom of the chamber roughens the dental floss when it is pulled out. The container is agitated so that the baking soda can adhere to the roughened dental floss. A cutter on the container is for removing a piece of the roughened dental floss with the baking soda adhered thereupon so it can be utilized in conjunction with hydrogen peroxide when used in areas between the teeth for the treatment of gingivitis.