Dental cements are either resin-based or acid-based materials that form a hard, brittle, cohesive material when they dry. These materials make a strong bond with teeth enamel and must resist dissolving when coming in contact with saliva. Dental cement may be left on your teeth after the removal of braces, retainers and other corrective materials. The dentist will remove most of this, but will sometimes leave some by accident.
Floss and brush your teeth regularly, and do so right before you decide to try to remove the cement. This will break off any loose cement. If you do this regularly, the cement will eventually dissolve on its own.
Look at your mouth in the mirror and identify spots of cement that you want to remove. Pulling your lips back may help you see cement in less visible areas.
Pick off the cement you find with a dental pick. Be careful not to chip away the enamel as this protects your teeth from damage. Work from the back of your mouth to the front, working one side and then the other, the top and then the bottom.
Rinse your mouth with lukewarm water after scraping each major quadrant. Try not to swallow any cement.
Brush your teeth when you've completed scraping. This will loosen any small amounts of leftover cement attached to your teeth.