What usual component helps in creating a smooth finish after polishing?

The component that aids in creating a smooth finish after polishing is fine pumice or aluminum oxide. These materials are specifically designed to provide a gentle yet effective polishing action that smooths out rough surfaces. Fine pumice particles can effectively abrade and smooth the enamel surface, while aluminum oxide is commonly used in dental applications due to its ability to create a finer finish without causing significant damage or abrasion to the tooth structure.

Using fine grits ensures that the enamel is polished to a shiny, smooth finish, which not only improves the aesthetic appearance of the teeth but also helps in maintaining their health by reducing plaque retention. In contrast, coarse sandpaper is too abrasive and can damage enamel, while standard toothpaste lacks the necessary abrasive properties needed for effective polishing. Water alone will not provide any polishing action, as it does not contain the necessary abrasives to smooth the surface effectively.