[Psychoneurological and degenerative-dystrophic disorders in patients with pathology of the temporomandibular joint]. / Psikhonevrologicheskie i degenerativno-distroficheskie narusheniya u patsientov s disfunktsional'nym sindromom visochno-nizhnechelyustnogo sustava.

OBJECTIVE: The aim of the study is to detail neuropsychiatric and degenerative-dystrophic disorders in patients with dysfunctional TMJ syndrome and develop principles for their correction. MATERIAL AND METHODS: 84 patients with complaints of impaired TMJ function were examined: 14 men (16.67%) and 70 women (83.33%) aged 18 to 74 years. The average age of the patients was 63.22±18.82 years. The analysis of the dental status was carried out, the state of the musculoskeletal system and somatic status in patients with dysfunctional TMJ syndrome was studied. Methods of diagnosis of autonomic dysfunction syndrome were used to assess the state of neuropsychiatric status. Occlusive disorders were evaluated in relation to the peculiarities of maintaining posture and autonomic joint dysfunction. RESULTS: Occlusive disorders were assessed in relation to the peculiarities of posture maintenance and autonomic dysfunction of the joint. Pathology of the temporomandibular region was accompanied by psychovegetative disorders in 80% of patients. At the same time, autonomic dysfunction was diagnosed with pathological changes in the autonomic index, the formation of anxiety and depression. CONCLUSION: The adequacy of rehabilitation measures was associated with the preparation of rehabilitation programs, considering the severity of dental pathology, the state of the somatic and emotional-volitional spheres. Elimination of musculo-articular dysfunctions and pain syndrome was of leading importance in the rehabilitation of patients.

[Colonization activity of conditionally pathogenic microorganisms and features of biofilm formation on the surface of thermoplastic polymer material]. / Kolonizatsionnaya aktivnost' uslovno-patogennykh mikroorganizmov i osobennosti obrazovaniya bioplenki na poverkhnosti stomatologicheskogo termoplastichnogo polimernogo materiala.

THE PURPOSE OF THE STUDY: Was to assess the microbial colonization and biofilm-forming activity of conditionally pathogenic microorganisms in vitro to samples of acrylic-free thermoplastic polymer material and to assess the possibility of its use for the manufacture of removable tooth splinting structures by injection method. MATERIALS AND METHODS: The reference strains S. aureus, S. epidermidis, S. pyogenes, E. faecalis, E. coli, and C. albicans. Biofilm-forming activity was assessed by the level of ethanol extraction of a 0.1% aqueous solution of gentian violet by measuring on a PowerWave X microplate reader (USA). RESULTS: A low degree of severity of microbial colonization and sufficient colonization resistance to the formation of a microbial biofilm of E. coli (0.374±0.056 cu opt. Pl.), S. aureus (0.272±0.039 cu. Opt. Pl.), S. epidermdis (0.299±0.028 cu opt. Pl.), S. ryogenes (0.399±0.069 cu opt. Pl.), E. faecalis (0.401±0.089 cu opt. Pl.). Moreover, C. albicans strains form a more pronounced biofilm (0.425±0.104 cu opt. Pl.) in comparison with other strains studied in the experiment. CONCLUSION: Samples from a thermoplastic polymer based on polyoxymethylene have satisfactory biomedical characteristics and can be used at the stages of dental orthopedic treatment of patients without oral candidiasis.

[Comparative evaluation of the microstructure of combined samples made on the basis of acrylic plastic]. / Sravnitel'naya otsenka mikrostruktury kombinirovannykh obraztsov, izgotovlennykh na osnove akrilovoi plastmassy.

THE RELEVANCE OF THE STUDY: Is dictated by the insufficient strength of the bases of removable plate prostheses made of acrylic plastic masses. The literature data confirm the high prevalence of strips of removable plate prostheses made of acrylic plastics, regardless of the complexity of the clinical situation, but in great dependence on the time of use of prostheses. The search for new approaches to reduce the risks of structural failures, regardless of the operating time, led to the emergence of a metal mesh and a composite frame. THE PURPOSE OF THE WORK: Is a comparative analysis of the resistance of structures to moisture and heat, in accordance with GOST R 57695-2017, aimed at modeling the aging of samples from acrylic polymers reinforced with a metal mesh and a composite frame based on fiberglass. MATERIALS AND METHODS: The whole experiment was carried out in accordance with GOST R 57695-2017 and was aimed at modeling the aging of three types of samples of acrylic polymers and combinations: «acrylic polymer-metal mesh¼, «acrylic polymer-composite frame¼ of size 20×18×1, 8 mm for studying microstructure and morphology. The obtained profiles of samples with a simulated aging effect were evaluated using an Axiovert 40MT optical microscope (Carl Zeiss), with an increase of ×200, ×500. RESULTS: Analysis of the microstructure data showed that profiles of 3 types of samples before exposure to aging factors have a homogeneous structure with a rough surface. With an increase of ×500 in four samples with a metal mesh, both before and after exposure to moisture and heat, the presence of voids between the base material and the metal reinforcing component is noted. In samples reinforced with composite material, its pronounced integration with acrylic plastic is preserved, which is due to the presence of a chemical bond. During the experiment, it was found that the conditions modeled according to GOST R 57695-2017 do not significantly affect the structure of the samples, and the morphology analysis revealed a close fit between the components of the materials in the combined samples and the absence of changes at the interface. CONCLUSIONS: The proposed option of reinforcing the base of a removable laminar denture, due to the introduction of a skeleton made of composite material based on fiberglass, is optimal for increasing the effectiveness of orthopedic treatment.

[Features and significance of adhesion of bacteria and fungi of the oral cavity as the initial stage of the formation of a microbial biofilm on dental polymer materials]. / Osobennosti i znachenie adgezii bakterii i gribov polosti rta kak etapa formirovaniya mikrobnoi bioplenki na stomatologicheskikh polimernykh materialakh.

OBJECTIVE: Characteristics of the adhesion of yeast fungi and oral bacteria of various types in vitro to samples of polymeric materials for fixed structures of dental prostheses, obtained using various technologies: adjective digital 3D printing and traditional methods. MATERIAL AND METHODS: Conducted model experiments on the adhesion of bacterial (including the main periodontopic-pathogenic species - P. gingivalis, P. intermedia, etc.) and fungal pathogens (C. albicans) to standard samples of polymer materials NextDent C & B Micro Filled Hybrid («NextDent¼, Netherlands), Detax Freeprint temp UV («Detax¼, Germany), obtained by digital additive 3D printing technology, and Luxatemp Automix Plus («DMG¼, Germany) and Acrytemp («Zhermack¼, Italy) - by the traditional method as a control. Removal of adhering microbes from the material was carried out using an ultrasound machine (exposure time 10 minutes, power 60 kHz). RESULTS: The dependence of the degree of microbial adhesion on the nature of the material and processing technology (3D printing, milling) was established. The materials of NextDent C & B Micro Filled Hybrid and Detax Freeprint temp UV showed high resistance to adhesion of clinical isolates of periodontal pathogenic bacteria and C. albicans fungi. CONCLUSION: The lowest adhesion values for periodontopathogenic species and C. albicans fungi were detected when using samples of materials obtained by 3D printing: NextDent C & B Micro Filled Hybrid and Detax Freeprint temp UV compared to Luxatemp Automix Plus and Acrytemp polymers.

[Prosthodontic treatment of edentulous patients with postoperative mandibular defects of oncological origin]. / Osobennosti ortopedicheskogo lecheniia patsientov s polnym otsutstviem zubov i posleoperatsionnymi defektami verkhnei cheliusti onkologicheskogo geneza.

The aim of the study was clinical and bacteriological approbation of improved obturator dentures with soft lining. The study involved 116 patients (68 females and 48 males aged 47-78) with edentulous jaws and side palatal defect of oncological origin. Improved elastic obturator maxilla dentures in patients with palatal defects proved to have better stability and provides better comfort effectively preventing inflammation of prosthetic bed soft tissues.