Comprehensive study of dental orthopedic morbidity in elderly people and the ways to eliminate it

Relevance. The social profile of senile people has some differences from other age categories of patients. People of the older age group dream of finding harmony with the outside world, preserving the love of the nearest and dearest and relatives and the opportunity to communicate with the opposite sex. Dental health and the resulting quality of life contributes to this in many ways. A smile, laughter, the ability to talk without feeling embarrassed by splashing saliva, bad breath or visible absence of teeth, taking your favorite food together with the nearest and dearest are the main indicators of their life quality dependent on dental health, without which it is impossible to imagine a modern person High prevalence of dental diseases among senile people cause a high need for making various dental prosthetic structures. Studying dental health of this category of citizens can become a promising area of practical healthcare, a comprehensive study of this issue has determined the relevance and purpose of this publication.Materials and methods. The object of the study was senile people, 75-89 years old, who sought dental orthopedic care in municipal healthcare institutions of Cheboksary, the Chuvash Republic. The sample size was 481 people.Results. It was found that the maximum number of patients in the age group of 75-88 years - 188 persons (39.1%) - had complete absence of teeth, the total number of patients with the first, second, third and fourth classes according to the Kennedy classification of dentition defects was 56 persons (11.6%), 143 persons (29.7%), 79 persons (16.4%), 15 persons (3.2%), respectively. The total number of patients with the first Kennedy subclasses (class 1-3) was 135 persons (33.1%), with the second subclasses – 69 persons (16.9%), with the third subclasses - 53 persons (13.0%). The analysis of dental prosthetic structures mounted in elderly patients showed that the total number of orthopedic structures amounted to 4,615 units, among which there were pin structures - 1,328 units (28.8%); the total number of artificial dental crowns was 1,662 units (36.0%); the total number of prosthetic bridges – 620 units (13.4%); removable laminar dentures in partial loss of teeth – 445 units (9.6%); clasp prostheses – 184 units (4.1%); removable laminar dentures in complete loss of teeth – 376 units (8.1%).Conclusions. All types of dental orthopedic diseases are commonly found in patients of senile age, they had all kinds of dental prosthetic structures made. The choice of the dental prosthetic design used in orthopedic dental rehabilitation was determined by the type of dentition defect and met the principles of rational prosthetics.

The influence of accelerated aging on the physical and chemical properties of a composite material: a systematic overview

Relevance. Today, dental composite materials are very popular among dentists. The composite material is a filler in the form of particles of various sizes immersed in a polymer matrix. Polymer composites are used for direct filling of all groups of teeth and at different depths of the lesion. Composite materials have optimum mechanical, aesthetic and functional properties. They are simple and easy to use, provide long-term restoration service, and also have a wide price range. All these qualities allowed composite materials to firmly gain a foothold in the practice of dentists around the world. In this regard, clinicians and researchers are constantly trying to significantly improve their physical, mechanical, adaptive and aesthetic properties.Aim. Conduct a systematic assessment of the available scientific data on the effect of accelerated aging of the composite on its physicochemical properties.Materials and methods. In the course of a systematic review of the literature, a study was made of publications in electronic databases such as Google Scholar, PubMed, Research gate, Elibrary. The search results are formatted using the Prisma diagram.Results. Dental composites inevitably age over time and under the influence of environmental factors. To predict the long-term service life of composite restorations, scientists and clinicians are studying the aging behavior of the material. To simulate the clinical conditions of the oral cavity, various methods of artificial aging of dental composite materials have been developed.Conclusions. A study of scientific papers published over the past 10 years on the topic of artificial aging of dental composite materials has shown its unambiguous effect on the mechanical and morphological properties of polymers. The use of methods for simulating clinical conditions made it possible to reduce the study time and analyze the changes obtained.

Laboratory studies of heated Bulk Fill composite in the tooth cavity during filling of teeth with carious defects

Aim. To study with the help of a microscope the marginal fit of Bulk-Fill group composite materials to the hard tissues of the tooth. Optimize the method of heating the composite in the cavity.Materials and methods. The marginal fit of the composite material of the Bulk-Fill group, sealed in 30 teeth of chewing anatomical and functional accessories extracted according to various indications, was studied. Materials used in the laboratory experiment: 3M ESPE Filtek posterior restorative Bulk Fill, SDR (Dentsply Sirona), Sonic Fill (Kerr). According to the manufacturers, the materials are used with the method of single-portion sealing. The research was conducted at the Department of General Dentistry of the S.M.Kirov Military Medical Academy of the Ministry of Defense of the Russian Federation.Results. 30 teeth extracted according to various indications of chewing anatomical and functional accessories were indicators were shown by the Sonic Fill (Kerr) system, due to heating and changing the viscosity of the material.Conclusions. It was proved in the laboratory that the heated composites of the Bulk-Fill group had the best edge fit during sealing than composites at normal room temperature. A nozzle was developed for heating the composite in the tooth cavity (priority application No. 2021120658 dated 12.07.2021).

Non-surgical correction of severe skeletal class 3 with Carriere Motion 3D class 3

The article describes the principle and method of treating a patient with III skeletal class malocclusion. The aim of the article is to demonstrate the treatment effectiveness with the Carriere Motion 3D class 3. As a result, Carriere Motion 3D class 3 has been shown to be effective in assessing early outcomes in the treatment of class 3 malocclusion.

Moscow State University of Medicine and Dentistry named after A.I. Evdokimov

Relevance. The effect of a tissue engineering construct based on synthetic octacalcium phosphate activated with plasmid DNA with vascular endothelial growth factor gene on bone morphogenesis at the jaw defect sites of patients was studied. It is shown that the studied osteoplastic material stimulates osteosynthesis pathways already at early stages, and xenogenic hydroxyapatite, triggers osteogenesis processes with considerable delay and does not have time to form a full-fledged bone structure by 6 months.Aim. Evaluate the dynamics of reparative osteogenesis based on the results of histomorphometric diagnostics in patients with defects in the jaw bones of various configurations and lengths with an implanted bone matrix based on synthetic octacalcium phosphate activated with plasmid deoxyribonucleic acid with genes of vascular endothelial growth factor.Materials and methods. Histomorphological examination of bone tissue biopsy of jaws was carried out in 50 patients of both genders, who needed additional volume of bone tissue to install dental implantation. Patients were divided into 2 groups by type of grafted material. 6 months after the surgery, bone biopsies were taken from the bone sites at the stage of implant placement. Histomorphological patterns and histomycrophotograms were studied in bone biopcies.Results. In bone tissue biopsies of patients implanted with a tissue engineering construct based on synthetic octacalcium phosphate activated with plasmid DNA with vascular endothelial growth factor gene, it was revealed that after 6 months there was prevaluation of mature bone tissue (42,71%), with the proportion of differentiated plate bone tissue being < 90%.Conclusions. Histomorphometric analysis showed that in patients implanted with a tissue engineering construct based on synthetic octacalcium phosphate activated with plasmid DNA with vascular endothelial growth factor gene, after 6 months, early rearrangement of bone tissue into a mechanically dense and highly mineralized structure was detected.

Optiminization of regeneration at the stages of soft tissue augmentation using a collagen matrix

Lack of adequate width and thickness of periodontal or peri-implant soft tissues can compromise the aesthetics, function or survival of teeth and dental implants. Biomaterials are widely used in dentistry to overcome the disadvantages of autogenous tissue transplantation. The advantage of using biomaterials is that there is no need for re-surgery and that they are available in large quantities. The most widely used biomaterial for soft tissue augmentation is collagen, as it is believed to best mimic the natural cellular environment of the extracellular matrix, although other biomaterials are also candidates for soft tissue regeneration. Collagen matrices differ in composition, three-dimensional structure, elasticity and mechanical stability. Aim. is to review the literature on the optimization of regeneration at the stages of soft tissue augmentation using a collagen matrix.

Anthropogenic factors of influence on the morbidity of the dental system of the children's population of Makhachkala

Relevance. The study of the relationship between the dental morbidity of children in the city of Makhachkala from the anthropogenic impact of a landfill.Materials and methods. The study was based on a survey of children aged 2 to 17 years in three kindergartens and two schools in the city of Makhachkala in the zone of ecological distress. A total of – 420 children were examined, including – 85 of the temporary bite period; – 110 of the replacement bite period and 225 of the permanent bite period. The criteria for the selection of children were the duration of residence in this neighborhood and the presence of the 1st, 2nd, 3rd and 4th health groups. The dental examination included an assessment of the condition of the oral cavity, hard tooth tissues and periodontal tissues using a set of dental instruments according to a generally accepted technique.Results. Studies on the relationship of poor-quality drinking water with a reduced content of fluoride and the prevalence of non-carious lesions of the hard tissues of the teeth revealed that in the city of Makhachkala, a high prevalence of molarincisive enamel hypoplasia was detected in 45.4% of the examined and a multiple form in 31.6%% of systemic hypoplasia, local hypoplasia was noted in 22.1%, segmental hypoplasia was observed in only 4 children from 335 examined. The prevalence of diseases of the oral mucosa is due to a decrease in immunity in an environmentally unfavorable city, due to the unbalanced composition of macro and microelements in drinking water, high content of sulfur oxides, carbon and dioxin-like compounds in the air. The prevalence and development of caries was noted in 75% of the examined children.Conclusions. The high morbidity rate of the children's population in Makhachkala is associated with the anthropogenic impact of solid household waste, poor-quality drinking water, air and indicates the need to develop modern waste disposal technologies and implement recommendations for the organization of preventive and medical-dental care for children from an early age.

The state of the alveolar bone tissue depending on the vitality of the tooth pulp according to the saliva indicators of patients with moderate periodontitis

Aim. To evaluate the results of surgical treatment of patients with moderate chronic periodontitis with different dental pulp status by determining sRANKL, OPG and FGF-2 in mixed saliva and dynamic densitotomometry data.Materials and methods. Surgical treatment of 24 patients with moderate chronic periodontitis was performed. Three months before the operation, according to the indications, endodontic treatment of the examined teeth was performed in some patients. Depending on the status of the dental pulp, the patients were divided into two groups: I – patients with vital teeth, II – patients with teeth after endodontic treatment. Before and after surgery, all patients underwent clinical examination, enzyme immunoassay of saliva remodeling markers and optical densitotomometry of periodontal bone to compare the results of treatment. Results. The OHI-S index showed a significant decrease in the mean value by 12 months of observation in both groups, which was statistically significant. Higher indices of the PI index by the end of the observation period were detected in the area of depulpated teeth. An equivalent dynamics of a decrease in the value of periodontal attachment according to the CAL index was revealed in both groups after treatment. The saliva showed an equivalent decrease in sRANKL, an increase in OPG by the end of the observation period, statistically insignificant when compared between groups. FGF-2 remained undetected at any of the observation periods in all groups. Densitotomometry data indicated an increase in the density characteristics of periodontal bone by the end of observations with a stable dependence on lower values in the area of depulpated teeth. Conclusions. In the saliva of patients, the processes of periodontal bone resorption were found to be statistically equivalent in intensity, regardless of the status of the dental pulp. The absence of FGF-2 content in saliva until the end of the observation period should be considered as an indicator of periodontal healing of vital and depulpated teeth by the formation of fibrous connective tissue. Dynamic densitotomometry of alveolar bone tissue revealed statistically significantly lower density characteristics in the area of teeth with a condition after endodontic treatment.

Features of local etiological factors of periodontal disease in residents of high latitudes

Aim. The purpose of the article is to determine specific regional risk factors for periodontal diseases in residents of the North-East of Russia on a complex clinical and physiological research.Materials and methods. A clinical study of the biophysical properties and composition of oral fluid (salivation rate, pH, viscosity, microcrystallization type, lysozyme activity) in the adult population with inflammatory periodontal diseases were done at dental clinic of the Medical Institute of M.K.Ammosov North-Eastern Federal University, dental clinic "Valeon" and clinical and diagnostic laboratory "Scientific and Practical Center of Phthisiatry" (Yakutsk). A total of 1012 individuals aged 15-19 years old (n = 248) and 35-44 years old (n = 764) were examined. Oral hygiene in the age groups was assessed by the Oral Hygiene Index according to J.C. Green and J.R. Vermillion (1964). In addition, social and hygienic status was assessed according Yu. V.Chizhov's method (2005). Statistical processing was carried out using the SPSS software package, version 22. The research was performed in accordance with the principles and rules of evidence-based medicine.Results. The obtained results determine quantitative and qualitative changes in oral fluid properties. The presence of biological risk factors associated with changes in the composition and properties of the oral fluid, as well as a low sanitary level, which are associated with viscosity increase, salivation rate decrease, a predominance of II and III types of microcrystallization, acidic pH level, a decrease in the level of lysozyme activity, were revealed. The identified risk factors have an impact on the prevalence of periodontal disease in the people of the North and mostly determine their clinical course.Conclusion. The revealed biophysical features of oral fluid in the examined adolescents and adult population of the North-East of Russia are specific regional local risk factors for the development of periodontitis, which must be taken into account when improving the therapeutic and preventive measures of pathological processes of periodontal tissues.

Risk factors analysis for early childhood caries

Aim. To study the dominant antenatal and postnatal risk factors for development early childhood caries (12 – 47 months).Materials and methods. In order to study the dental morbidity of the child population aged 1 to 3 years, permanently living in Moscow, an epidemiological examination of 510 children was carried out. To determine the dental status of the subjects, clinical research methods were carried out. To assess antenatal and postnatal risk factors for the development of caries in children aged 1 to 3 years, a questionnaire survey was conducted between parents or legal representatives. The survey participants answered 5 questions that are important for understanding the causes of early tooth decay.Conclusions. With growing up, the prevalence of caries increases. The prevalence of Early Childhood Caries among the boys and the girls aged 12-23 months and 24-35 months depends on the sex of the child. A statistically significant difference in the intensity of caries in different age groups was revealed; the older the age group, the higher the intensity of caries. The risk of caries in children in the group with the pathological course of the mother's pregnancy is higher than in the group with the normal course of pregnancy. A statistically significant relationship was found between the prevalence of caries in children and the age at which toothbrushing began.