[Laboratory evaluation of the effectiveness and safety of the Chairside Light Whitening System fläsh].

The Aim Of The Study: Optimization of methods for treating dental discoloration using whitening systems based on hydrogen peroxide by laboratory studying their chemical properties.

Material And Methods: The effectiveness of the bleaching system was assessed by quantitatively assessing the color change of model samples of hydroxyapatite (HAP) in the CIE L*a*b* system on a Spectron-M color analyzer after exposure to coloring food media. Safety assessment was carried out on samples made from teeth removed according to indications.

[Laboratory methods for measuring adhesive bond strength between restoration materials and hard tooth tissues].

Was to review laboratory methods measuring the bond strength of adhesive dental materials to hard tooth tissues. The paper points out the impact of test conditions on the measured strength of adhesive bond to dentine and enamel. Various studies are discussed, including the analyses of fracture surfaces and test-induced stresses.

[Reinforcement of photosensitive material for bases of orthodontic appliances].

Objective: The objective of the study was to improve the strength properties polymer by modifying its basis with various materials.

Material And Methods: A polymer in the form of a pink-colored plasticine mass with veins was studied, a quartz mesh «Quartz splint mesh» manufactured by RTD (France) and two metal gold-plated wire mesh (0.1 mm and 0.

[Comparison of the film thickness of composites of different degrees of viscosity].

The measurement of the film thickness of the composite cement Variolink Esthetic («Ivoclar-Vivadent», Liechtenstein) and the microhybrid composite Enamel («Micerium», Italy) was carried out according to ISO 4049: 2009 standards with a load force of 5 kg. While reducing the load force to 5 kg, all materials showed an increase in the film thickness; the film thickness of the Variolink Esthetic composite cement was changed from 23 microns (at 15 kg) to 32 microns (at 5 kg), and the film thickness of the microhybrid composite film Enamel was changed from 39 microns (at 15 kg) to 102 microns (at 5 kg). After preheating, the film thickness was changed from 23 microns (at 15 kg) to 44 microns (at 5 kg).

[Study of the film thickness of dental composite resins after preheating].

Purpose: To compare film thickness of adhesive resin cement and dental composite resins after they are preheated with hot air.

Material And Methods: The film thickness was measured using adhesive resin cement Variolink esthetic (Ivoclar-Vivadent, Liechtenstein), micro-hybrid composite Enamel (Micerium, Germany) and nanofilled composite Estelite sigma quick (Tokuyama Dental, Japan) at different temperatures.

Results: The film thickness of the Variolink esthetic at room temperature was 23 μm, and the dental composites after preheating them with hot air and applying adhesive on both surfaces to be joined produced the following results: Estelite 62 μm and Enamel 25 μm.