Dental caries - a pathological process manifested demineralization and subsequent destruction of dental hard tissues with the formation of a defect in the form of the cavity. Initial caries occurs mainly in places where conditions are favorable for the accumulation of plaque and dental plaque. Contribute to the formation of caries and general factors (inadequate intake of protein, vitamins, mineral salts, etc.), as well as violations of the functions of other organs and systems, stressful situations. There are two stages of dental caries: an early - stage white (pigmented) spots and the stage of formation of the defect solid tissue (superficial, intermediate and deep caries). Treating caries is possible at all stages. At the initial stage of caries (caries slick, superficial caries) is sometimes enough with the help of special techniques to the restoration of dental tissues (remineralization). However, when the localization of the defect in natural cavities or on the contact surfaces necessarily carried dissection and sealing of the cavity. In the middle and deep caries cavity dissection is mandatory. Treatment consists of an instrumental treatment of enamel and dentin, followed by drug treatment cavity, the imposition of gaskets and permanent seal. The quality and durability of the seals depend on many factors. First, the qualifications of the doctor, the quality of filling materials and compliance with treatment technology. However, the essential condition of the tooth and its salinity. Dental fillings - a method of treatment, ensuring the restoration of anatomic form and function of the tooth by filling defects in solid tissues and cavities filling material. Fillings prevent the spread of caries and restoration process. Temporary fillings. Intended for short-term isolation of the cavity, for example, in order to preserve the drug or therapeutic pads on the bottom of the cavity. Therapeutic gaskets. In cases where the bottom of the cavity is close to the pulp, even the most gentle dissection adversely affect the pulp of the tooth. In these cases, cover the bottom of the cavity produce therapeutic pad. After the deposition and solidification treatment pad is placed an insulating gasket and a permanent seal. Isolation pads. Isolation pads insulate the pulp of a permanent filling material, toxins, isolated permanent filling material from the impact of dental lymph and contribute to better adhesion of the seal. Materials for permanent fillings. There are several classes of materials for permanent dental fillings: amalgam, cements, composites, hybrid materials (Compomers, ormokery). Dental Amalgam. Alloy obtained by combining mercury with silver alloy. Recent studies have shown the complete harmlessness of this material, and currently has resumed production of silver amalgam. Cements. The main ones are tsinkfosfatnye, tsinksilikatnye, tsinkpolikarboksilatnye cements. Currently used rarely and only for special operations. GLASS cements. They have good chemical adhesion to tooth structure. Dental composite materials and light chemical curing. Today is the main class of permanent filling materials. Their advantages: high strength and aesthetic characteristics, manufacturability. However, composites do not have the chemical adhesion to tooth structure, which eliminates the use of adhesive systems. Compomers. Light-Composites "hybrid" type, combining the advantages of composites and of glass. Ormokery. Light-Composites "hybrid" type. Materials based on a matrix of organosilicon compounds Adhesive system. Promote the accession of composite materials to dental tissues.