[Юрій І. Силенко, Ігор В. Животовський, Марина В. Хребор, Богдан Ю. Силенко, Олена А. Писаренко ОЦІНКА СИЛИ АДГЕЗІЇ НА ЗСУВ ПРИ ФІКСАЦІЇ ВІНІРІВ ASSESSMENT OF ADHESION ON OFFSET AT FIXATION OF VENEERS].

Objective: Introduction: The use of ceramic veneers is one of the modern methods of correction of color changes in teeth. The effectiveness of treating dental discoloration with the use of veneers depends on their high-quality fixation on teeth. The aim of the research is to conduct a comparative assessment of the adhesion strength on offset when fixing veneers by various materials and methods.

Patients And Methods: Materials and methods: four types of samples were studied for five each. The first sample is the veneer of typical tooth preparation, fixed on DENTSPLY's Calibra composite cement. The second sample is the "inlay in veneer" design on a tooth with atypical preparation, fixed on DENTSPLY's Calibra composite cement. The third sample is the veneer of standard preparation, was fixed on GC's Gradia Direct heated light curing composite. The fourth sample is the "inlay in veneer" design on a tooth with atypical preparation, fixed on a heated light curing Gradia Direct composite manufactured by GC. The veneers are made of pressed ceramics - disilicate of lithium IPS e.max Press and laminate ceramics IPS e.max Ceram. The tests were carried out using the deformation unit MRK-1.

Results: Results: The adhesive strength of the first sample was 18.8 MPa, the second was significantly increased by 51&. In the third sample, adhesive strength increased by 71& as compared to the first sample, and by 14& as compared to the second one. The adhesive strength of the fourth sample was 46.5 MPa, which is 147& more as compared to the first sample, 64& and 44& higher than the second sample and the third sample, respectively.

Conclusion: Conclusions: Fixation of inlays on the heated composite, both in the classical technique of preparation, and when applying the "inlay in veneer" technique, improves the adhesive strength of the compound by almost 2.5 times.