Sulcular epithelium is a fancy name for the tissue that lines the space between your teeth and your gums. It's like a little pocket that goes all the way around each tooth. The sulcular epithelium is very important because it helps protect your teeth and gums from germs and other yucky things that could make them sick.
Think of the sulcular epithelium like a fence around your yard. The fence keeps things out, but it also helps keep things in. In this case, the sulcular epithelium keeps harmful bacteria and other things from getting under your gums where they could cause problems. But it also keeps your saliva and other helpful things around your teeth where they can do their job and keep your mouth healthy.
Even though you can't see it, the sulcular epithelium is always hard at work keeping your teeth and gums healthy. So be sure to take good care of your teeth by brushing and flossing every day, and visiting your dentist regularly. Because when your sulcular epithelium is happy, everyone is happy!