The oral cavity cannot become a sterile environment, nor can it eliminate all bacteria. Because after the bacteria are eliminated, fungi will attack again, causing more serious and difficult to control consequences. Therefore, we must persistently fight against dental plaque, keep these "communities" at a low number, and prevent "communities" from developing and growing, and even eventually becoming calcified and forming calculus. After the calculus is formed, it cannot be removed by daily oral care. You can only seek professional help and remove it with special equipment.
Removal of plaque is similar to cleaning the room. Wall cracks and various gaps are often the most difficult places to clean. The "gap" of teeth is between teeth and gums, and between teeth and teeth. Different methods are needed to clean different parts.