The tooth also had all the components of normal teeth, including enamel, crown and root, and connective fibers to fix it to bone.
培育的牙齿还具备正常牙齿的所有组成成分，包括釉质、齿冠和牙根，以及使其固定于骨头的结缔组织纤维。
2
As one of these components, friction modifier plays an important function for removing the dirt and colored substance attached to the surface of tooth.
磨擦剂作为牙膏的组分之一，在其中起着重要的作用，它能有效的除去附着在牙齿表面的污垢和有色物质。
3
However, tooth floss with whitening components will not only clean your teeth. It will also help you keep the enamel whiter.