[header] How to choose dental floss [title] Choose a thick floss when you have large gaps. [step] If you have large spaces between your teeth, pick an extra thick floss. Some options include dental tape or super dental floss. 
Choosing a thicker floss will help ensure that you are actually flossing all the surfaces of your teeth and makes flossing easier. [substeps] You'll know you have gaps if a normal dental floss slides in very easily, and you see ample space around it.