Hard Tooth Tissues Research Articles

Compositional and micromorphological features of hypoplastic enamel in children’s permanent teeth

Enamel hypoplasia is the most common disease of hard tooth tissues of non-carious origin emerging before their eruption. It develops as a result of a delayed and perverse function of ameloblasts leading to the violation of the processes of formation and mineralization of tooth protein structures. The clinical manifestations of enamel hypoplasia are spots, defects in the form of pits, cup-shaped depressions, grooves on various surfaces of child’s teeth. The work is devoted to a comparative investigation of microstructural and compositional features of intact and hypoplastic enamel in children’s permanent teeth using analytical scanning electron microscopy with energy-dispersive X-ray spectroscopy. The hypoplastic enamel is enriched in organic substance and has an irregular structure without keyhole-shaped prismatic structure. Mineral deposition is indicated for hypoplastic enamel including hydroxyapatite with globular structure and calcite and halite, which might have been caused by the violation of extracellular local environment probably due to the enamel hypoplasia development.

DENTAL CROWN BIOMINERALIZATION DURING ITS HISTOGENESIS

The aim: Thepaper wasaimedat thestudyof thebiomineralization processesofa permanentdental crown in thepostnatal period of histogenesis. Materials and methods: The study involved 30 culled puppies aged 30-40 days. To study the histogenesis of the germs of the permanent tooth from the cuticular epithelium in the postnatal period microscopic, electron microscopic, immunohistochemical methods of study have been used. Results: The studies show that in the postnatal period, the maturation of the germ of a permanent tooth starts with the synthesis of cells of the cuticular epithelium of the organic stroma, capable of subsequent mineralization. Differentiation of the proameloblasts, located on the surface of the dental papillary mesenchyma, at the early stages of histogenesis, is strongly associated with the appearance of a specific protein taftelin. Origination of secretory ameloblasts, which produce the protein enamelin, triggers the process of secondary biomineralization of the enamel. The terminal processes of the secretory ameloblasts produce the protein in the form of layers that overlap each other at a certain angle. Such layering of the structures of enamel and dentin contributes to the S-shaped maturation of the hard tooth tissues, strengthening them considerably. At the follicle stage, maturation of the dental crown, coated with cuticular epithelium, occurs. Invaginations of the cuticular epithelium form a characteristic topography of the dental crown, and enamel projections are further formed by the ameloblasts. Epitheliocytes of the inner layer of the enamel organ have desmosomal connections that allow the filtration of the salivary fluid at the stage of the enamel trophism. Conclusions: The findings of the study suggest that, normally, due to the cuticular epithelium, filtration of the salivary fluid occurs with protein deposition on it and subsequent infiltration of the calcium salts into the subjacent enamel.

The frequency of detection of pathological tooth root resorption according to X-ray studies

Процесс резорбции твердых тканей зуба может быть вызван многими факторами, действующими отдельно или одновременно. Наружная резорбция корня, обусловленная воспалением, — достаточно распространенное осложнение, возникающее после смещения зуба, например в результате подвывиха или полного вывиха. Патологической резорбции уделяется особое внимание и с позиции осложнения ортодонтического лечения. По некоторым данным, имеются указания на то, что патологическая резорбция корня встречается у 0—90% лиц, не подвергавшихся никаким видам стоматологических вмешательств. Зачастую процесс протекает бессимптомно и определяется случайно при проведении рентгенологической диагностики. Изучению данного состояния сегодня посвящено много исследований, результаты которых зачастую противоречивы. Цель данного исследования — выявить частоту патологической резорбции корня зуба по данным рентгенологического исследования. В статье представлены результаты анализа рентгенологических снимков на предмет распространения различных видов резорбции твердых тканей зуба

Development And Preclinical Evaluation Of Preparation Effectiveness For The Treatment Of Hard Tooth Tissues After Temporary Filling Removal

Development And Preclinical Evaluation Of Preparation Effectiveness For The Treatment Of Hard Tooth Tissues After Temporary Filling Removal

Atenolol increases dental mineralization in male offspring of treated hypertensive rats and normotensive rats.

This study evaluates how atenolol affects dental mineralization in offspring of female spontaneously hypertensive rats (fSHR) and normotensive Wistar rats (fW). fSHR and fW were treated with atenolol (100 mg/Kg/day, orally) during pregnancy and lactation. Non-treated fSHR and fW were the control groups. Enamel and dentin hardness were analyzed (Knoop, 15 g load, 10s) in mandibular incisor teeth (IT) and molar teeth (MT) obtained from the male offspring of atenolol-treated and non-treated fWistar and fSHR. Data were analyzed by ANOVA, followed by Tukey post hoc test (p < 0.05). Atenolol reduced the arterial blood pressure (SBP) in fSHR, but it did not change the SBP in fW. The offspring of non-treated fSHR had lower enamel (IT and MT) and dentin (IT) hardness than the offspring of non-treated fW (p < 0.05). Atenolol increased enamel and dentin hardness in the IT obtained from the offspring of fSHR and fW (p<0.05), but the offspring of fSHR presented higher values (p < 0.05). Atenolol did not alter enamel width in the IT obtained from any of the groups, but it increased enamel and dentin hardness in the IT obtained from the offspring of fSHR and fW. Atenolol affected the IT obtained from the offspring of fSHR. Atenolol increased only enamel hardness in the MT obtained from the offspring of fW. In conclusion, maternal hypertension reduces tooth hard tissues, and treatment with atenolol increases tooth hardness in male offspring of hypertensive and normotensive female rats.

PROGNOSTIC INDICES OF PATHOLOGICAL TOOTH WEAR DEVELOPMENT

The aim: To study possibilities of prognosis of pathological wear of tooth hard tissues development depending on the functional activity of masticatory muscles. Materials and methods: In order to achieve the goal of the study, a survey of patients at the age of 19 to 69 years was conducted for precision of number of persons who have increased tooth wear. During the examination of all patients, three groups were selected: control and two researched ones. Patients in the control group (30 patients between the age of 18 and 60 years old) had an intact dentition without any visible sign of increased tooth wear. The researched groups included 25 patients aged from 18 to 60 years old. The secondresearch group included patients who had increased tooth wear of I-III level. The children of the patients of the II group with or without any sign of increased tooth wear were referred to the third research group. Results: The method of electromyography was performed for the study of peculiarities of the muscular activity of the maxillofacial area of the patients of the control and research groups. In our opinion, all manifestations of increased tooth wear are related to changes in the muscle system, the motor apparatus and the nervous activity of an organism. Conclusions: The study of direct muscular apparatus and related bone system may predict the possibility of developing of an increased tooth wear of young patients in the future and prevent its development, as well as to justify the application of a prevention and treatment plan of the studied pathology.

Dental status of patients with squamous cell carcinoma of the oropharyngeal region

Purpose of the study . To evaluate changes in the oral cavity in patients with squamous cell carcinoma of the oropharyngeal region after radiation therapy. Materials and methods. The study included 70 patients with oropharyngeal squamous cell carcinoma. All patients underwent external beam radiation therapy. We used dose fractionation mode: 5 fractions per week, single focal dose — 2G. The severity of oral mucositis was assessed using the RTOG evaluation scale. Results . Patients with carcinoma of the oropharyngeal region before the start of the main treatment had pathology of hard tooth tissues (CPU-14.62±1.08), gingival inflammation (PMA-41.71±4.98), periodontal inflammation (CPITN-2.54±0.62). After the end of radiation therapy, oral mucositis was detected in all patients (100%). We found changes in the negative side for all indicators of dental status indices compared to primary CPUs-15.26±0.90; CPITN-3.36±0.58; PMA-49.75±5.28 (p<0.05). Clinical signs of oral mucositis begin to appear as early as 7 days after the start of radiation therapy, RTOG=1,5. After 3 weeks, patients develop severe mucosal lesions with fibrinous plaque and severe pain syndrome (RTOG=3.0), requiring intensive drug therapy (p<0.05). Conclusion . In connection with the early appearance of post-radiation oral mucositis, preventive and therapeutic measures to improve the regeneration.

AN ELECTRONIC EXCEL-CALCULATOR FOR CALCULATING DENTAL CROWN VOLUMES

Previous studies have found that with increasing volume of hard tissues defect, the sensitivity of the restored structure to the physical and mechanical restoration characteristics is increasing too. Since existing volume determination techniques cannot be use in a clinical setting, this gives reason to consider the problem of volume determination dental hard tissue defects extremely important, and this research-relevant.&#x0D; Aims of research. Develop and evaluate the possibility of using methods to determine dental crown volumes and volumes of defects in hard tooth tissue.&#x0D; Materials and methods of research. For determination of crown volumes and defect volumes of hard tooth tissues for each group of teeth were used appropriate geometric models. Together with the built models, were performed the mathematical calculations to calculate their linear dimensions.&#x0D; Results of the research. We have developed and substantiated the feasibility of using an electronic Excel calculator to calculate dental crown volumes in clinical settings.&#x0D; Conclusions. Using our electronic Excel calculator to calculate tooth crown volumes and methods for determining the volume of dental hard tissue defects, in clinical settings we can objectify the diagnostic process in the presence of dental hard tissue defects.

CORRELATION INTERRELATION OF PSYCHOEMOTIONAL STATE OF CHILDRENWITH SOCIO-HYGIENIC FACTORS OF CARIES OCCURRENCE

Questionnaire is one of the possible ways of research in organized children's groups, which allows us to identify socio-hygienic factors of caries occurrence. Proper oral hygiene, awareness of children about this, regular preventive visits to a dentist, knowledge about the possibility of caries prevention play an important role in caries prevention. Lately, a great attention is paid to the psycho-emotional state of adult patients and especially of children due to the impact school strain and the formation of behavioral responses on them.&#x0D; The aim of our research was to study the correlation interrelation between the psycho-emotional state of children from 6 to 16-year-old with the socio-hygienic factors of dental caries occurrence.&#x0D; Dental survey, analysis of the emotional state and interrogation of children and their parents were performed in 295 children from 6 to 16-year-old. Children and their parents were interviewed in order to study the influence of socio-hygienic factors on the possibility of caries occurence. Psycho-emotional state was studied by the following methods: method of definition of school fears, kinetic image of the family, Spielberg's self-esteem scale of personal anxiety level.&#x0D; Definition of school fears has revealed that 13.2% of the surveyed children had signs of general school fear, 15.6% had a fear of social contacts with peers, 10.2% had a fear of social contact with teachers, 17.0% had a fear of self-expression, 10.2% had a fear of knowledge test situations, 38.6% had a fear of not meeting the expectations of others, 14.6% had low physiological resistance to school fears. Anxiety (by Spielberg`s method) was found in 80.3% of surveyed. Only general school fear (rs = 0.17, p &lt;0.005) correlated with the children age. Its frequency increases in 2.6 times after 12 years age.&#x0D; Only 36.1% of children did not experience psychological distress inside of their families. However, tensed relationship inside of families was not determined in 51.4% of children without caries and only in 22.1% of children with caries (pMU &lt;0.001). There are correlation interelationships between caries development and tensed relationships inside of families and general school fear, less pronounced correlation between carious process activity and tension inside of families and general school fear.&#x0D; Children with low physiological resistance to school fears have the least complaints about the condition of tooth hard tissues. However, complaints do not have significant interrelation with caries presence. Children with caries do not have complaints about the presence of carious cavities in teeth, rarely complain on discoloration, misalignment or irregular shape teeth, equaly as children without caries. Children with a fear of knowledge testing are the most likely to complain about the presence of carious cavities.&#x0D; Children who can better resist to school fears are more likely to visit a dentist for a preventive purpose. Children who have a fear of social contact with teachers or fear of unsettled meeting the expectations of others are less likely to seek a preventative meeting with a dentist. Increasing anxiety (according to Spielberg`s method) contributes to preventive treatment. Low physiological resistance to school fears indicates the risk that, even if there is pain in a tooth, children do not seek for a dental support.&#x0D; During the questionnaire of children the dependence of general school fear presence with the age of the child was found, which frequency increases in 2.6 times after 12 years age.&#x0D; There is a correlation interrelationship between the frequency of attendance of a dentist and the presence of a common school fear, ie, greater the fear, less attendences of a dentist. Greater the children`s general school fear is observed, greater the anxiety during the dentist appointment is noted. The results are improved according to work with children and their parents on the regulation of the emotional state of children.

RAMAN-FLUORESCENT CHARACTERISTICS OF DIFFERENT ANATOMICAL AND TOPOGRAPHIC ZONES OF TEETH OF DIFFERENT FUNCTIONAL GROUPS

The aim of the study is to study the state of mineralization of various anatomical and topraphic zones of teeth for different functiona I groups and to justify its clinical feasibility. In a preclinical in vitro study on 20 model test objects of teeth (incisors, canines, premolars and painters), removed according to clinical indications, Raman-fluorescent study of the degree of mineralization of various anatomical and topographic zones of the tooth in different functional groups of teeth was carried out. Used APC Inspector M with a wavelength of532 nm probing radiation. The advantages of Raman fluorescence spectroscopy for determining the degree of mineralization of hard tooth tissues are objectivity (digital technology), expressiveness, non-invasiveness, simple and non-destructive control of the degree of mineralization/remineralization of hard tooth tissues, the ability to document and store information. In th e course of the study, a qualitative and quantitative analysis of the mineralization of various anatomical and topraphic zones of teeth for different functional groups of teeth was carried out. High sensitivity and reproducibility of the method allowed to reveal significant differences in mineralization of tooth enamel in the area of the cutting edge, equator and neck of the tooth. It is shown that these differences are manifested in other functional groups of teeth (p &lt; 0.05).

Distribution of molar incisor hypomineralization in children in Northeast Bulgaria. Severity of the dysplasia and sensitivity of the affected teeth

INTRODUCTION: Molar incisor hypomineralization (MIH) is dysplasia associated with quantitative and qualitative disturbance in the development of the hard tooth tissues, described as a separate nosological unit for the first time in 2001. The distribution of the disease is significantly different in different geographic regions and varies from 2.4% to 40% with average distribution worldwide of 12.9% affecting over 17 million people all over the world. The modern science still cannot determine its exact etiological cause so it is considered that dysplasia is an idiopathic disease. Gene mutation is discussed as an etiological factor caused by the influence of environmental factors. Other causes might be systemic diseases, infections, intoxications, and use of different medicines. AIM: The aim of the article is to investigate the distribution of MIH in relation to its severity and concomitant hyperesthesia. MATERIALS AND METHODS: A retrospective study was conducted in the University Medical Dental Center - Varna, including 1183 children, examined with a standard set of dental instruments – dental mirror, probe and pincers. The examination was done after professional cleaning and drying of the teeth. The dental status was filled out in individual ambulatory cards for each patient. RESULTS: The study investigated the distribution of MIH in Northeast Bulgaria and found that 6% of the children in the sample experienced dysplasia. In most of the cases (61%), children had all 4 permanent molars affected by it. The results supported outcomes of other studies regarding the association between the severity of the dysplasia and the presence of concomitant hyperesthesia. With the increase in the severity of MIH tooth sensitivity increases. CONCLUSION: Recent studies concerning the distribution of MIH have shown that dysplasia appears frequently in modern society. Severe hyperesthesia reflects the lifestyle and restricts the diet of children. In some cases, a radical surgical approach is considered, which may traumatize the psychological state of the child and increase the anxiety in future dental treatment.

Perbedaan Daya Antibakteri Ekstrak Temulawak (Curcuma xanthorrhiza Roxb.) 3,125% dan Chlorhexidine 0,2% terhadap Lactobacillus acidophilus

Background: Caries is a process of demineralization of hard tissues of teeth due to the activity of bacterial metabolism. Lactobacillus acidophilus as one of the cariogenic bacteria that important process of deep caries. Efforts that can be used to inhibit cariogenic bacteria for example using antibacterial agents such as chlorhexidine that have been shown to inhibit Lactobacillus acidophilus bacteria, but chlorhexidine has some side effects. It takes basic herbal ingredients as an alternative agent that can inhibit the growth of cariogenic microorganisms, one of them is temulawak extract. Purpose: This research was conducted to compare antibacterial agent between Curcuma xanthorrhizaRoxb and chlorhexidine 0,2% to inhibit Lactobacillus acidophilus. Methods: The research was a laboratory experimental study. Temulawak extract was made by maceration method with etanol 96% and certain dilution was performed to obtain concentration of temulawak extract 100%, 50%, 25%, 12,5%, 6,25%, 3,125%, 1,56%, 0,781%. A preliminary study was conducted to determine the value of KHM and KBM of temulawak extract against Lactobacillus acidophilus were known by counting the growth of bacteria colonies on muellerhinton media in CFU/ml. From the calculation of the number of colonies Lactobacillus acidophilus, obtained KHM value of 3.125% and KBM value of 6.25%. Further research is conducted by comparing antibacterial ability of temulawak extract used KHM concentration and chlorhexidine 0,2% by using diffusion method by measurement of inhibiton zoneResult: Measurement result of inhibition zone by using calipers show that chlorhexidine 0,2% have inhibiting zone (in mm) 15.1; 15.2; 15.4; 14.9; 15.0; 15,15; 15.5; 15.7; 15.8; 16.0; 14.6; 15.2; 14,85; 15,1; 15.3; 15,2, while the measurement of inhibition zone of temulawak extract 3,125% are (in mm) 10,0; 10.3; 10.2; 9.9; 9.8; 10.1; 10.3; 10.1; 10.45; 10.1; 9.95; 9.85; 8.85; 9.35; 9.45; 9.4. Conclusion: Chlorhexidine 0,2% more potential as antibacterial agent than temulawak extract 3.125% to inhibit Lactobacillus acidophilus.

Research of Influence of Salivary and Oral Cleaning Hygiene on Indicators of Mineralization of Hard Tooth Tissues of Different Functional Groups

Research of Influence of Salivary and Oral Cleaning Hygiene on Indicators of Mineralization of Hard Tooth Tissues of Different Functional Groups

Magnetic resonance imaging and computed tomography of equine cheek teeth and adjacent structures: comparative study of image quality in horses in vivo, post-mortem and frozen-thawed

BackgroundThe use of cadavers for radiology research methodologies involving subjective image quality evaluation of anatomical criteria is well-documented. The purpose of this method comparison study was to evaluate the image quality of dental and adjacent structures in computed tomography (CT) and high-field (3 T) magnetic resonance (MR) images in cadaveric heads, based on an objective four-point rating scale. Whilst CT is a well-established technique, MR imaging (MRI) is rarely used for equine dental diagnostics. The use of a grading system in this study allowed an objective assessment of CT and MRI advantages in portraying equine cheek teeth. As imaging is commonly performed with cadaveric or frozen and thawed heads for dental research investigations, the second objective was to quantify the impact of the specimens’ conditions (in vivo, post-mortem, frozen-thawed) on the image quality in CT and MRI.ResultsThe CT and MR images of nine horses, focused on the maxillary premolar 08s and molar 09s, were acquired post-mortem (Group A). Three observers scored the dental and adjacent tissues. Results showed that MR sequences gave an excellent depiction of endo- and periodontal structures, whereas CT produced high-quality images of the hard tooth and bony tissues. Additional CT and MRI was performed in vivo (Group B) and frozen-thawed (Group C) in three of these nine horses to specify the condition of the best specimens for further research. Assessing the impact of the specimens’ conditions on image quality, specific soft tissues of the maxillary 08s and 09s including adjacent structures (pulps, mucosa of the maxillary sinuses, periodontal ligament, soft tissue inside the infraorbital canal) were graded in group B and C and analysed for significant differences within CT and MR modalities in comparison to group A. Results showed that MRI scores in vivo were superior to the post-mortem and frozen-thawed condition.ConclusionsOn comparing the imaging performance of CT and MRI, both techniques show a huge potential for application in equine dentistry. Further studies are needed to assess the clinical suitability of MRI. For further research investigations it must be considered, that the best MR image quality is provided in live horses.

Topographic characterization of canine teeth using atomic force microscopy images in nano-scale

The purpose of the present study was to investigate a new method to evaluate micro topography and micro morphology of hard tissue of canine teeth using an atomic force microscope (AFM). For this aim, three extracted human canine teeth were applied. The unpolished surfaces were analyzed with AFM images with 15 µm × 5 µm area and their information obtained by power spectral density (PSD) method and fast Fourier transform algorithm. It was observed that PSD analyses extract suitable information about surface morphological variations so that by moving from enamel to cementum, the fractal dimension and surface complexity were increased.

ВОЗРАСТНАЯ ДИНАМИКА СТОМАТОЛОГИЧЕСКИХ И ЛАБОРАТОРНЫХ ПОКАЗАТЕЛЕЙ ЗДОРОВЬЯ У ДЕТЕЙ 5-6, 12, 15 ЛЕТ ГОРОДА ЕКАТЕРИНБУРГА

Subject. The health status of children and adolescents is one of the most acute medical and social problems. It is known, that with dental diseases, changes occur not only in the immunological profile of the oral fluid, but also in morphology of the oral tissues. New approaches to the traditional cytological study of buccal epithelium such as analysis of the cytogram with the isolation of various types of cells, as well as the detection of cytological abnormalities of cells, allows us to evaluate the reactivity of the oral mucosa in pathological processes. According to WHO recommendations (2013), groups of children 5-6, 12, 15 years of age are the global indicator age groups for monitoring disease trends and comparisons on an international scale.&#x0D; The objective of the study is to assess the health status of children age 5-6, 12, 15 with non-invasive methods. It is based on the results of a clinical and laboratory examination of 179 children, attending organized children's groups. Children underwent a comprehensive dental examination, which included a questionnaire according to the WHO method, an external examination of the maxillofacial region, an examination of the oral cavity, identification of pathology of hard tooth tissues. &#x0D; Methodology. We studied the change in the dental status of patients, indicators of oral fluid and basal epithelium with age, in order to prognostically use non-invasive assessment methods in a comprehensive health examination, planning and evaluating the effectiveness of prevention programs. &#x0D; Results. It was noted that the dental health status of children 5-6, 12, 15 years old can be assessed as satisfactory, while dental, laboratory and cytological health indicators worsen with age. Non-invasive methods for assessing the dental status of patients can be used in a comprehensive examination of children's health, planning and evaluating the effectiveness of prevention programs.

THE CONDITION OF SKELETAL SYSTEM IN PUPILS WITH HEARING IMPAIRMENT

Pathogenic link of dentofacial abnormalities with posture disturbance and vertebra deformation causes interest in researchers, because the problem of the disorder of skeletal system has an important role. Orthodontic correction of dentofacial abnormalities without treatment of skeletal apparatus is incorrect and it leads to the large number of relapses and complications and also including temporo-mandibular joint. The aim of the research was to study correlation between injuries of hard tissues of teeth, posture disorders, bite abnormalities (malocclusion) in schoolchildren with hearing disorders. The condition of hard tissues of teeth, muscoskeletal system, dentofacial system in pupils with hearing impairment was done and evaluated. The age of examined is 6-19 years old, bite formation: 1st – presents the period of mixed bite (6-13 years old), 2nd – presents the period of permanent bite (14-19 years old). Results and conclusions: During dental examination it was detected that 58 pupils with hearing disorders (81,8%) have carious lesions of the teeth, the level of caries intensity contains 3,36. The condition of skeletal system was investigated in 56 pupils (36 boys and 20 girls). Disturbances of skeletal system in schoolchildren with hearing disorders presented 94,74%; 5,26% of pupils were almost healthy. The condition of the bite was examined in 58 pupils (32 boys and 26 girls). Different types of disorders of dentofacial apparatus were detected in 100% of pupils with hearing disorders. The most widespread pathology of bite was Angle’s bite (the first class) 68,97%, the second class – in 27,58%, the third class – 3,45%. Orthognathic bite among pupils with hearing disorders was not observed. In 31,15% of pupils during temporo-mandibular joint, deviation of mandible is observed.

The role of odontogenic infection role as a medical justification of planning the individual prevention programs in childbearing age women

Relevance:odontogenic infection plays an important role in the development of pregnancy complications, often causing premature birth of the child, as well as limiting its growth and development. According to studies Figueiredo C., Rosalem C., Cantanhede A. found that during pregnancy, women’s organs undergo various physiological, neurological and hormonal changes that occur gradually. In the process of such a restructuring of the body changes the dental status, which determines the correction stages of individual oral hygiene. According to the study Trigolos N. N., Firsova I. V., Makedonova Y. A. and others determined that dental health improves dental status, eliminates the possibility of exacerbation of chronic odontogenic foci of infection, reduces the risk of fetal infection and development of prenatal and postnatal complications, as well as a positive effect on antenatal prevention of dental diseases of the child.Materials and methods:a total of 216 pregnant women were examined and monitored for a month. To study the hygienic status of women during pregnancy with the pathology of hard tissues of teeth, the hygienic index of green-Vermillion was used. Assessment of the acid-base state of the oral fluid was carried out using the pH meter of the company “Hanna” with a replaceable pH electrode HI 1270. Antimicrobial activity of the hygiene of the mouth was studied with the use of different means of oral hygiene in the process of carrying out hygienic measures to identify maximum efficiency in the selection of funds and the development of “personal hygiene prevention programme”.Results:the assessment showed an increase in the cleansing effect for the entire period of the study in group 1 from 16.90 ± 3.53% to 49.77 ± 5.62%, in group 2 – from 28.19 ± 3.85% to 64.21 ± 6.32%, in contrast to the control – from 16.14 ± 3.21% to 35.87 ± 5.07%. Indicators of changes in acid-base efficiency of oral fluid were in the 1st group 2.50 ± 0.20, in the 2nd group - 3.21 ± 0.20, and in the 3rd group was 2.38 ± 0.20.Conclusion:during pregnancy, it is necessary to choose the right hygiene products to ensure oral health and maintain odontogenic infectious status, which eliminates the risk of preterm birth, which threatens a pregnant woman. The importance of odontogenic infection and ways of prevention in women of childbearing age is determined by the development of measures to strengthen dental health and plays a leading role in the planning of individual programs for the prevention of major dental diseases in women of childbearing age.

SURVEY OF A FUNCTIONAL STATE OF MASSETER MUSCLES IN EDENTELOUS PATIENTS BASED ON THE DATA OF SURFACE ELECTROMYOGYOPHY STUDIES

The difficulty of prosthetics and rehabilitation of patients with complete loss of teeth is associated with a burdened psychological and anatomical status. The main reasons for teeth extractions are periodontal tissue diseases, diseases of hard tooth tissues of carious and non-carious origin and traumas. Complete loss of teeth leads to a large number of local and general complications. The masticatory apparatus undergoes a number of functional and morphological changes. It becomes necessary to manufacture complete removable dentures to prevent the occurrence of pathologies in such situations. The effectiveness at this type of dentures depends on compliance with the protocols of their fabrication and the quality of the basic dental materials. Currently, prosthodontists use thermoplastic plastics in the fabrication of complete removable prostheses, more commonly the main group of materials for this constructions are heat-polymerized acrylic resins. Evaluation of the quality of the fabricated complete removable dentures and of the functional state of the masticatory system after prosthetics is determined by their fixation and stabilization, restoration of the patient's appearance and degree of masticatory effectiveness. It can be determined by using of a surface electromyography an objective method for evaluation of the functional state of muscles by recording of their electrical biopotentials.&#x0D; The aim of our study was to study the functional state of the masseter muscles using surface electromyography in edentulous patients, who got dentures made from a thermoplastic base material «Vertex ThermoSense» in the prosthodontics clinic.&#x0D; Material and methods. We used polyamide (nylon) «Vertex ThermoSense», (Netherlands) in this work, for the fabrication of complete removable dentures. We made dentures for 19 elderly and senile patients (60 years and older) with a complete absence of teeth, who retired to the prosthodontics clinic with a goal of manufacturing new complete removable dentures for the upper and lower jaws. Over the past 3-5 years, they have been using complete removable dentures that were made from acrylic resins.&#x0D; Results. Assessing the results of the electromyographic study after 1 year of using of the dentures, it can be concluded that the amplitudes during compression approach the norm and almost four times higher than before prosthetics. A similar pattern as observed with the arbitrary chewing: the amplitudes approach the norm in comparison with the results before prosthetics. As for the coefficient «K», its value decreased in comparison with the results before prosthetics almost twice, which is largely close to the norm.&#x0D; Conclusion. Based on our study of the functional state of the masticatory muscles using surface electromyography in edentelous patients, who got dentures made polyamide thermoplastic material from a «Vertex ThermoSens», we can conclude that of electromyographic studies before prosthetic treatment are significantly different from normal, and after a year of using of dentures are as close as possible to them, which indicates a quiche adaptation to dentures.

Реминерализирующая терапия с использованием GC Tooth Mousse

The results of the own investigations are represented in this work. The analysis of the clinical findings, the positive dynamics of saliva microcrystallization proves the efficacy of remineralizing GC Touth Mousse preparation in the treatment of the initial caries, in remineralization of non-caries lesions and hard teeth tissues with unfinished mineralization.