Differentiated approach to the choice of the adhesive system in filling of vital and devital teeth

Abstract

Relevance. To date, due to the escalation of domestic import substitution in the field of medicine and dentistry, the study of the adhesive bond strength of Russian-made bonding systems when filling teeth with composite materials remains very relevant. At the same time, the issue of the strength of adhesion to the dentin of vital and devital teeth remains insufficiently studied, especially in the aspect of the use of bonding systems of IV-V-VII generations in the restoration of hard dental tissues.Aim. To conduct a comparative analysis of the adhesive strength of modern bonding systems when filling vital and devital teeth in an experiment.Materials and methods. The experimental study included 18 freshly removed teeth. To create the "seal-tooth" complex, Dentlight composite material (VladMiVa, Russia) and 3 adhesive systems (AS) of different generations (VladMiVa, Russia) were used, according to which the samples were divided into subgroups: 1 – Two-component Belabond (AS – IV generation); 2 – Dentlight (AS – V generation), 3 – Self-etching Belabond (AS – VII generation). The value of the adhesive bond was estimated by the value of the destructive stress that occurs when the composite sample is shifted relative to the dentine surface of the tooth using an Instron testing machine. Statistical analysis of the data was performed using the Student's t-test at p < 0.05.Results. The adhesive strength had a statistically significant difference (p < 0.01) between the study groups. It was found that the greatest adhesion force with vital teeth was observed using the adhesive system of the VI generation (Mpa = 23.1), and for filling devital teeth – the adhesive system of the V generation (Mpa = 17), respectively. Low adhesion strength was revealed in generation VII AS (less than 10 MPa) to the dentin of vital and devital teeth (p < 0.05).Conclusion. It was found that the strength of adhesion decreases by 2 times in the group of devital teeth when using IV generation AS, while IV and V generation adhesives are effective for filling vital teeth.