Microbiological research was carried out by PCR method in 42 persons aged 25-60 years (men - 24 and women - 18), installed and Osseo integrated DIO dental implants, which were prototyped by metal-ceramic crowns, with temporary fixation on Tempo Bond NE. After 20 days, a follow-up visit was scheduled. All the examined patients were taken biological substrate of gingival fluid from the para-implant furrow using paper endodontic pins (№ 25). Exposure of two pins was made within 30 seconds with the help of tweezers between the peri-implant cuff and the crown, biological substrate of gum liquid was taken from the parai-implant furrow. The biological substrate was transported and tested according to the manufacturer's recommendations. When studying the content in patients with orthopedic constructions on dental implants by PCR method we observed high frequency of occurrence of Streptococcus sobrinus (69,3%), Streptococcus sanguis (48,6%) and Porphyromonas gingivalis (41,9). Relatively similar data on the content of these microorganisms were obtained in the molecular genetic study of Streptococcus oralis samples (22.7%). Obviously, it is the combined effect of the most frequently diagnosed pathogens and peculiarities of interaction of anaerobic agents of parasitocenosis that can determine the nature of inflammatory and destructive process in the peri-implant zone.
Для снижения амплитуд ускорений при высокочастотных воздействиях и амплитуд перемещений при низкочастотных колебаниях, в работе был применен принцип парных колонн, которые рассчитывались за пределами упругости. В начале, внутренние колонны воспринимают только изгибающие моменты и осевые усилия. При увеличении перемещения, в работу включаются наружные колонны. В зазорах между внутренними и наружными колоннами монтируются распирающиеся узлы и демпферы разрывного типа.
People lose their teeth throughout their lives for various reasons: due to age, diseases (severe forms of periodontitis), and maxillofacial injuries. This condition is called adentia. Restoration of the dentition with complete or partial adentia occurs with the help of removable and non-removable dentures. Removable dentures present discomfort to many, causing the gag reflex and inconvenience. To solve this problem, implantation is used. All-on-4 technology refers to a one-stage technique with immediate loading, since a fixed prosthesis is installed immediately after implantation, until the artificial root is completely fused with the jawbone. Dental implantation and prosthetics on four implants quickly and effectively restores the aesthetics and functions of the dentoalveolar apparatus. If in classical prosthetics the patient will have to wait more than six months for all the implants to heal, then the “all on four” procedure allows the teeth to be installed on the day of treatment. In each jaw, two implants are located in the front part vertically and parallel to each other, and two implants - at an angle of up to 45 degrees in the distal region, where the molars are located.
Одной из наиболее часто встречающихся аномалий зубочелюстной системы является сужение верхнего зубного ряда, которая составляет 63,2% от общего числа зубочелюстных аномалий. Сужение верхнего зубного ряда сопровождается аномалиями положения зубов, зубных рядов и прикуса. Наряду с морфологическими изменениями при сужении верхнего зубного ряда наблюдается изменение височно-нижнечелюстного сустава, функций жевательных и мимических мышц, пародонта зубов, неправильное дыхание, глотание, нарушение речи и т.д. Данная аномалия зачастую сопровождается эстетическими нарушениями лица, что в свою очередь снижает социальную адаптацию пациента.
Under our supervision, there were 92 patients with included and terminal defects of the dentition, who underwent prosthetics based on dental implants of the “DIO” system at the Department of Orthopedic Direction FPK TGSI Control group (13) of the patient, “manual toothbrush” - during the entire study period, patients used only a manual toothbrush to clean the crowns on implants; The second group (30) of patients who were prescribed a “manual toothbrush + interdental brush”, corresponding to the size of the proximal space of the orthopedic construction; The third group (49) of patients who were prescribed a “manual toothbrush + interdental brush + irrigator”, in addition to a manual toothbrush, were prescribed an interdental brush and an oral irrigator, an irrigator Waterpik WP-660 (Aquarius) was prescribed for the oral cavity after brushing teeth twice per day for 3-5 minutes, the power of the water jet of the irrigator corresponded to mode 2. An index assessment of the amount of plaque in the area of a fixed structure on implants was carried out using a simplified index of oral hygiene (IGR-U) (J. R. Vermillion, 1964) The condition of the gums in the area of dental implants was assessed based on the Gingival Index (GI) - Loe & Silness, 1963. Thus, at the beginning of the study in all three groups, the HI was low and corresponded to good implant hygiene. After 3 and 6 months, the values of those indices were significantly worse, and corresponded to the unsatisfactory hygiene of the implants. In groups 2 and 3, throughout the entire study, HI indices were optimal and corresponded to good and satisfactory implant hygiene. The indicators of the 3rd group, in which the whole complex of individual and professional methods was applied, were the most positive throughout the study, in comparison with other groups. Analysis of the results of the Gingival Index study showed that the indicator increased in all observation groups. In group 2 patients using manual dental and interdental brushes for cleaning the structure, by the end of the study period the index value increased to 0.95 ± 0.05 points, which corresponded to mild gingivitis of the gums in the area of implants, i.e. there was slight hyperemia and individual punctate bleeding of the gums at the probing sites. Patients of the 3rd group, using an irrigator, had minimal index values at all periods of the study, and the index values were interpreted as “normal gums”, that is, no signs of gingivitis were recorded.
Free metal ions from dental alloys may cause allergic, cytotoxic or pathogalvanic reactions. The presence of free cobalt ions is tested by a quantitative reaction. Saliva samples are taken for checking the presence of metal ions and isoprostanes. Open circuit potential measurements are conducted before and after fixing the PFM crowns produced by SLM and 3D printing
To evaluate the effectiveness of orthopedic treatment by using cast stump pin inlays with total destruction of the crown part destroyed at the bifurcation of the tooth by premolarization.