Treatment of caries at the II stage involves preparation of the tooth, since there has been not only a change in the color of the enamel and dentin in the carious center, but also the destruction of tissues that must be removed. After that, a seal is placed. During the session, the dentist carefully prepares the affected carious cavity, washes it with a disinfectant solution, and then fills the prepared area with a composite filling material.

A composite filling is a filling that is made of polymer resin with the inclusion of quartz powder, which gives the filling additional strength and is necessary to isolate the sensitive tissues of the tooth and prevent microbes from entering the cavity. Such fillings are universal due to their good aesthetic qualities, they are installed both on frontal and lateral teeth. Composite material is used both for filling and for tooth restoration in aesthetic dentistry. The service life of a composite seal is 7 years.

• light-cured (cured under the influence of the light of a special lamp);
• acrylic-containing (especially strong and resistant to abrasion);
• contain epoxy resin (especially resistant to abrasion, but may darken over time).