The cleaning principle of the toothbrush.

The working principle of the toothbrush is both chemical and physical. Manual or electric brushing action is the main physical action. When brushing, the bristles of the toothbrush move back and forth across the surface of the teeth. This friction helps to clean food particles and plaque produced by bacteria from the surface of the teeth and the spaces between the teeth. The shape and softness of the bristles are also crucial design elements. The right bristles clean the mouth more effectively and fit into the nooks and crannies of the teeth. The main source of chemical activity is toothpaste. Fluoride and other ingredients in toothpaste help clean and protect teeth. They help remove plaque and prevent the formation of calculus and cavities, thus protecting dental health. The general principle behind the cleaning function of a toothbrush is that the chemical activity of the toothpaste and the physical friction of the bristles remove food particles and germs from the mouth, thus keeping the teeth healthy and clean.