The short answer is YES!
Despite the recent news stories that said flossing wasn't necessary, there are many reasons why flossing is an essential part of your daily oral hygiene regimen.
Eating and drinking sugary foods causes a buildup of plaque on all surfaces of your teeth - including between them. By only brushing, you are missing out on cleaning 40% of your tooth's surface area. YIKES! There are two major impacts all of that plaque has on your mouth.
1) Plaque can harden over time when minerals from your saliva interact with it. Hardened plaque, or calculus, are irritating to the gums and bone and can cause issues like bad breath, bleeding/puffy ...