If a patient is flossing as their form of interdental cleaning then one piece of floss should be used each time. The piece of floss should be the length from your little finger to the bottom of your elbow. Floss can also be pre-threaded on a frame for easier use, these are called flossettes. Care must be taken when either using floss or flossettes not to saw into the gum when using, the floss should be wrapped in a C shape around the tooth and gently brought below the gumline. See video below demonstrating flossing.