What is dental floss? Dental floss is a nylon thread which is multithreaded . dental floss is available with chemist. you need to use the dental floss between two teeth. dental flossing is the best way to clean interdental areas. dental flossing is recommended after your brushing of teeth at night. dental flossing will reduce chances of tooth decay and bad breath. You can learn dental flossing technique from dr Prashant Bhangale by visiting Advanced dental clinic and Implant centre, Kedar Empire, Karve road Erandawane Pune4.