The gums, ligaments, and bone around the teeth form the foundation for ones teeth. All structures are also referred to as the periodontium. When the periodontium is not healthy, it jeopardizes the teeth just as a bad foundation would threaten the stability of a house. Signs of unhealthy periodontium include: gums that are red and bleed easily, persistent bad breath, gums that are pulled away from the tooth, loose teeth, and changes in the position or bite of the teeth.