Introduction. Fluid composites are resin-based materials, diluted with low viscosity, which is used in dentistry as a restorative material for frontal, lateral teeth and in the treatment of carious and non-carious diseases. Purpose. Evaluation of the types of coronary dental lesions according to the etiological factor at the front teeth. Analysis of dental glyphs at the composite-dental tissue interaction. Material and methods. a) In that study were included 28 patients, 10 women and 4 men aged between 30 and 45 years, who went to the USMF No. 1 dental clinic for treatment. In accordance with the purpose and objectives of this paper, we studied specialized literary sources and analyzed the clinical and paraclinical features of diagnosis with the development of a treatment plan. b) As working materials, were used: fluid composites such as Clearfil AP-X Esthetics Flow (Kuraray) and composites Clearfil AP-X ES-2 (Kuraray). Results. After examining the patients, the presence of carious diseases was determined in 85.7% of cases, non-carious diseases in 14.3% of cases. Microscopic analysis of dental grinds demonstrated better adhesion of fluid composites to viscous composites. Conclusions. The most recent studies evaluated on state-of-the-art fluid composites have shown that fluid composite materials are designed to provide better mechanical, physical, optical and aesthetic properties than many other universal composites.