One of the most important functions of the oral fluid is to maintain oral homeostasis. In-office teeth whitening systems are able to change the mineral metabolism and the activity of a number of enzymes in the oral fluid, but there are conflicting data in publications about this. The aim of this study was to compare the effect of Opalescense Boost, ZOOM Advance POWER, and ZOOM Phillips White Speed, which contain different percentages of hydrogen peroxide, on the performance of oral fluid. After the procedure of whitening teeth with the studied in-office systems, the concentration of calcium in the oral fluid increased, and the activity of alkaline phosphatase decreased. Calcium levels returned to baseline values after 30 days, and alkaline phosphatase activity returned after 14 days. There was no significant difference in the changes in calcium concentration and alkaline phosphatase activity between different tooth whitening systems. Chemical teeth whitening with the Opalescense Boost system caused the largest change in the activity of superoxide dismutase in the oral fluid compared to the ZOOM Advance POWER and ZOOM Phillips White Speed photocatalytic teeth whitening systems. An increase in the activity of superoxide dismutase by +75.5% was shown immediately after the procedure of teeth whitening with the Opalescense Boost system, which indicated an increase in the power of antioxidant defense mechanisms. To assess the effectiveness and safety of using various whitening systems, it is possible to study the dynamics of the activity of superoxide dismutase, which reflects the processes of antioxidant protection of the oral cavity.

На сегодняшний день изменение цвета зубов — одна из распространенных проблем для людей различных возрастных групп и слоев населения. Это достаточно часто встречающий и полиэтиологический вид патологии твердых тканей зубов, не имеющий универсального метода лечения. Цель работы — изучение необходимости применения эмаль-герметизирующего ликвида на ткани зубов после процедуры химического отбеливания зубов. В эксперименте использовались 24 зуба, удаленных по ортодонтическим показаниям. Процедура химического отбеливания зубов осуществлялась с применением системы Opalescence Xtra Boost. Реминерализующая терапия была проведена с использованием эмаль-герметизирующего ликвида. Изучали элементный состав эмали и дентина методом энергодисперсионной спектроскопии. При традиционном отбеливании без применения реминерализующего препарата и при отбеливании с однократным применением ликвида ширина дентальных канальцев заметно увеличивается, тем самым увеличивая проницаемость между эмалью и дентином. При многократном применении ликвида наблюдается уменьшение ширины дентальных канальцев, а следовательно, уменьшение входных ворот для инфекции. Применение ликвида способствует удалению органического налета с поверхности зуба, сохранению и восполнению состава микроэлементов, обеспечивающих прочность зуба, уменьшению ширины дентальных канальцев и, как следствие, снижению гиперчувствительности зубов. In our days, tooth discoloration is one of the common problems for people of different age and population groups. This is a fairly common and polyetiological type of pathology of hard dental tissues, which does not have a universal method of treatment. The purpose — study the need to use enamel-sealing liquid on dental tissue after the procedure of chemical teeth whitening. . 24 teeth extracted for orthodontic indications were used in the experiment. The procedure of chemical teeth whitening was carried out using Opalescence Xtra Boost system. Remineralizing therapy was carried out using enamel-sealing liquid. The elemental composition of enamel and dentin was studied by energy dispersive spectroscopy. . At traditional bleaching without application of remineralizing preparation and at bleaching with single application of liquid the width of dental tubules markedly increases, thus increasing the permeability between enamel and dentin. With repeated application of liquid, there is a decrease in the width of the dental tubules and hence a decrease in the entrance gate for infection. . The use of liquid helps to remove organic plaque from the tooth surface, to preserve and replenish the composition of microelements that provide tooth strength, to reduce the width of dental tubules and, consequently, to reduce hypersensitivity of teeth.

The basis of modern teeth whitening systems is the use of a whitening gel, usually containing hydrogen peroxide or carbamide peroxide. The purpose of our study was to evaluate the effect of chemical and modified office teeth whitening systems on the mineral metabolism of oral fluid and to determine a safer method. The study covered 81 patients aged 22 to 35 years of both sexes with teeth color A2 and darker on the Vita Classic scale. Determination of the concentration of calcium and phosphates in the oral fluid was carried out on a spectrophotometer using ready-made Human kits. Chemical tooth whitening was performed using a gel based on 40% hydrogen peroxide. After the procedure, remineralization therapy with enamel-sealing liquid was performed for 14 days. The obtained results indicate that the most pronounced changes in the content of calcium (+74.4%, p <0.001) and рhosphates (phosphorus) (-23.07%, p <0.001) were observed when using a chemical bleaching system. After the teeth whitening procedure using a modified technique, less pronounced changes in the concentrations of calcium (+29.07, p <0.001) and phosphorus (-14%, p <0.001) were observed. The use of remineralizing agents led to a faster recovery of the initial levels of calcium and phosphates in the oral fluid. Both bleaching systems caused similar changes in the chemical composition of the oral fluid.

The basis of modern tooth whitening systems is the use of a whitening gel, which usually contains hydrogen peroxide or carbamide peroxide. The study included 81 patients aged 22 to 35 years with a tooth color A2 and a darker color on the Vita Classic scale. The purpose of our research was to identify a new approach to whitening teeth to improve safety and gentleness. To perform this, we assessed the effect of the tooth whitening procedure on the mineral composition of the oral fluid. A new approach to the teeth whitening procedure was to use a mouth retractor and a tool for aspirating the whitening gel, which we developed. Before the procedure, a protective film-forming aerosol, which included sodium ascorbate, was applied. After the tooth whitening procedure, the enamel was remineralized with a sealing liquid for 14 days. The concentrations of calcium and phosphorus in the oral fluid were determined using a spectrophotometer with a set of reagents (Human). The results obtained indicate that the new approach to the teeth whitening procedure contributed to less pronounced changes in the concentrations of calcium (+29.07, p < 0.001) and phosphorus (−14%, p < 0.001) in the oral fluid immediately after the procedure and in combination with the standard procedure for teeth whitening; immediately after this procedure, the calcium concentration increased by 74.4% (p < 0.001), and the phosphorus concentration decreased by 23.07% (p < 0.001). The use of remineralizing agents led to a faster recovery of the initial levels of calcium and phosphorus in the oral fluid.