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  • 1
    Online Resource
    Online Resource
    Sensitivity of parodontopatogens to the cell juice of Siberian fir (microbiological investigation)
    ECO-Vector LLC ; 2022
    In:  Russian Journal of Dentistry Vol. 25, No. 6 ( 2022-07-22), p. 505-510
    Details
    In: Russian Journal of Dentistry, ECO-Vector LLC, Vol. 25, No. 6 ( 2022-07-22), p. 505-510
    Abstract: BACKGROUND: Search for new effective means of preventing inflammatory complications in the state of peri-implant tissues is relevant; in particular, products from coniferous greens produced by the Solagift company (Tomsk) are of interest. The bioeffective cell juice of the Siberian fir, the 100% carbon dioxide extract of Siberian fir (water fraction), stands out among them. Fir cell juice is recommended for enhancing immunity, preventing inflammatory diseases of the upper respiratory tract, and treating several pathological conditions. Fir juice contains vitamin C, carotene, polyphenolic compounds, flavonoids, iron, magnesium, copper, manganese, zinc, and maltoliron chelate complex (a natural antioxidant). AIM: This microbiological study aimed to examine the sensitivity of periodontal pathogens to bioeffective cell juice of Siberian fir of various concentrations. MATERIAL AND METHODS: A number of periodontal pathogens were cultivated in the presence of bioeffective Siberian fir cell juice in the following proportions: 1:5, 1:10, and 1:15. Incubation for up to 3 days was conducted in a reverse-spinner RTS-1 bioreactor (BioSan, Latvia) with automatic analysis of the optical density (OD) of the culture at a wavelength () of 850 nm. OD was measured in McFarland units (mcf). The assessment of culture growth control was based on the analysis of the growth phases of periodontal pathogens: adaptive (lag phase), exponential (log phase), stationary, and withering away. The following clinical isolates of microorganisms were used: Streptococcus constellatus, Staphylococcus aureus, Fusobacterium nucleatum, and Aggregatibacter actinomycetemcomitans. RESULTS: The microbiological study of the sensitivity of periodontal pathogens (such as S. constellatus, S. aureus, F. nucleatum, and A. actinomycetemcomitans) to bioeffective cell juice of Siberian fir showed a growth slowdown of microorganisms in the presence of fir juice and inhibition of the growth of a culture of periodontal pathogens when co-cultivated with fir juice. A significant decrease in the OD of cultures of all studied periodontal pathogens was observed at a fir juice concentration of 1:10 and 1: 5. At these concentrations, there was no growth of S. aureus culture, and the degree of decrease in the average OD of other periodontal pathogens reached 27.1% (A. actinomycetemcomitans), 31.8% (F. nucleatum), and 33.6% (S. constellatus).
    Type of Medium: Online Resource
    ISSN: 2413-2934 , 1728-2802
    URL: Article
    DOI: 10.17816/1728-2802-2021-25-6-505-510
    Language: Unknown
    Publisher: ECO-Vector LLC
    Publication Date: 2022
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  • 2
    Online Resource
    Online Resource
    Dynamics of the state of supporting implants of covering and fixed prostheses in the complete absence of teeth
    ECO-Vector LLC ; 2022
    In:  Russian Journal of Dentistry Vol. 26, No. 1 ( 2022-08-31), p. 25-30
    Details
    In: Russian Journal of Dentistry, ECO-Vector LLC, Vol. 26, No. 1 ( 2022-08-31), p. 25-30
    Abstract: BACKGROUND: The functional duration of implant prostheses in the complete absence of teeth is insufficiently represented in the special literature. Hence, the experience of using such prostheses of various designs over 20 years is summarized. AIM: To analyze the effectiveness of implant prostheses in the complete absence of teeth in terms of peri-implant tissue status MATERIAL AND METHODS: This study examined 23 patients with fixed dentures on 4 implants after 5 years and 30 patients with fixed dentures on 6 implants after 10 years from the manufacture date. Overdentures on 4 implants with rigid attachments were analyzed in 24 patients after 10 years and with elastic attachments in 28 patients after 20 years. Additionally, 20 years ago, 73 patients received overdentures with bar fixation on 2 implants. The evaluation criteria include the detection of mucositis, peri-implantitis with 1/3 and 1/2 bone resorption, and implant removal. RESULTS: When summarizing the state of implants over 20 years, the following results were obtained: removable dentures are more effective with rigid attachments on a bar and 4 implants and less effective on 2 implants (47.9% and 65.2% of implant removals, respectively); fixed prostheses with complete absence of teeth (experience of 10 years of use) are preferred with support for 6 implants (28.3% of removals vs. 42.4% with support for 4 implants). CONCLUSIONS: In conclusion, the proportion of removed implants is 50% of the installed ones. The functional average period of fixed prostheses on 6 implants in the absence of teeth is 10 years (on 4 implants is 5 years) and removable prostheses on 24 implants with elastic and rigid attachments is 5 years.
    Type of Medium: Online Resource
    ISSN: 2413-2934 , 1728-2802
    URL: Article
    DOI: 10.17816/1728-2802-2022-26-1-25-30
    Language: Unknown
    Publisher: ECO-Vector LLC
    Publication Date: 2022
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  • 3
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    Online Resource
    Experimental and clinical study of the concentrations of chemical elements in oral fluid from prostheses and implants
    ECO-Vector LLC ; 2023
    In:  Russian Journal of Dentistry Vol. 26, No. 6 ( 2023-02-28), p. 497-501
    Details
    In: Russian Journal of Dentistry, ECO-Vector LLC, Vol. 26, No. 6 ( 2023-02-28), p. 497-501
    Abstract: BACKGROUND: Electrochemical reactions can occur in the mouth of patients with prostheses made of metal alloys. The phenomena of galvanism reflect the hidden process of corrosion of structural alloys in oral fluid, which makes it necessary to analyze the chemical contents of prostheses under clinical conditions in patients with implants and experimental conditions. AIM: Comparative analysis of the trace element content in the oral fluid from prostheses in implants in the clinic and an experiment. MATERIALS AND METHODS: National Research Technological University MISIS analyzed artificial saliva after prostheses were in contact with grade 4 and grade 5 implants for 3 months. Titanium, cobalt, chromium, aluminum, vanadium, molybdenum, tungsten, manganese, nickel, and iron were determined by spectrometry. The same chemical elements were analyzed using an identical spectrometric method in 32 patients with fixed dentures on implants. RESULTS: Under the experimental conditions, nine trace elements were found in the container around one grade 4 implant with a crown, including titanium (0.4 g/l), cobalt (3.8 g/l), chromium (0.5 g/l), aluminum (2.6 g/l), vanadium (0.6 g/l), molybdenum (1.5 g/l), tungsten (3.0 g/l), manganese (0.9 g/l), nickel (0.5 g/l), and iron (0.6 g/l). The grade 5 implant was characterized by a greater degree of diffusion of aluminum, nickel, and manganese into artificial saliva. Mass spectrometry of the oral fluid in patients with dental implants revealed more trace elements than experimental data. The difference in the concentration of microelements from the prostheses under clinical conditions and in the experiment ranged from 0 to 128 times the minimum. CONCLUSION: Fixing experimental prostheses on implants for 3 months in artificial saliva was accompanied by the diffusion of microelements from the prostheses and implants into the environment, particularly cobalt, aluminum, and vanadium. Prostheses on implants with a lower titanium content are characterized by a greater degree of diffusion of aluminum, cobalt, nickel, and manganese. More significant diffusion of microelements occurred from the prostheses into the saliva under clinical conditions, according to the spectrometric data.
    Type of Medium: Online Resource
    ISSN: 2413-2934 , 1728-2802
    URL: Issue
    URL: Article
    DOI: 10.17816/dent-2022.26.6
    DOI: 10.17816/dent115204
    Language: Unknown
    Publisher: ECO-Vector LLC
    Publication Date: 2023
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  • 4
    Online Resource
    Online Resource
    Frequency of galvanic pair detection of metal structures in the mouth in the absence of galvanic syndrome and pathological changes in the oral mucosa
    ECO-Vector LLC ; 2023
    In:  Russian Journal of Dentistry Vol. 27, No. 1 ( 2023-06-19), p. 15-22
    Details
    In: Russian Journal of Dentistry, ECO-Vector LLC, Vol. 27, No. 1 ( 2023-06-19), p. 15-22
    Abstract: BACKGROUND: Currently, numerous metal structures are used in dentistry, such as implants, pins, dentures, etc. These structures are often made of various metals and metal alloys with different electrochemical potentials. This circumstance can lead to the appearance of a galvanic cell, consisting of metal structures. In the existing literature, no data reveal the frequency of the detection of galvanic pairs of metal structures in the mouth in the absence of galvanic syndrome and oral mucosal diseases. AIM: To examine the detection frequency of galvanic pairs of metal structures in the mouth in the absence of galvanic syndrome and pathological changes in the oral mucosa. MATERIALS AND METHODS: A survey of 133 patients aged 3387 years was conducted to detect the presence of galvanic pairs of metal structures in the mouth. All patients do not have galvanic syndrome and pathological changes in the oral mucosa. The patients were divided into four age groups: 3344 years old (n = 33), 4559 years old (n = 35), 6074 years old (n = 35), and 7587 years old (n = 30). Electrochemical potentials of metal structures in the mouth were determined according to the method developed at the Department of Therapeutic Dentistry of the E. V. Borovsky Institute of Dentistry of the First Moscow State Medical University named after I.M. Sechenov (Sechenov University). An electrode made of 999 gold was used as an active indicator electrode, which was used to touch metal structures in the mouth during the study. An EHP-1 silver chloride electrode was used as a passive reference electrode. A Fluke 115 multimeter was used as a measuring device. RESULTS: In the group aged 3344 years, galvanic pairs were found in 18%, and they had 5.2 2.1 metal structures. The group aged 4559 years had 7.4 3.5 metal structures in the mouth, and 23% of the participants had galvanic vapors in the oral cavity. In the group aged 6074 years, 26% had galvanic vapors in the oral cavity. In this group, the maximum number of metal structures in the mouth was 7.9 4.1. In the group aged 7587 years, 20% had galvanic pairs of metal structures in the mouth, and they had 5.9 1.8 metal structures in the oral cavity. CONCLUSION: Galvanic pairs of metal structures in the oral cavity were found is 1826% of the participants in different age groups. The share is associated not so much with age but to a greater extent with the number of metal structures in the oral cavity. With the increased number of metal structures, the probability of the appearance of a galvanic pair in the mouth, formed by metal structures with different electrochemical potentials, increases.
    Type of Medium: Online Resource
    ISSN: 2413-2934 , 1728-2802
    URL: Issue
    URL: Article
    DOI: 10.17816/dent.2023.27.1
    DOI: 10.17816/dent173956
    Language: Unknown
    Publisher: ECO-Vector LLC
    Publication Date: 2023
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