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The purpose of this study was to evaluate the level of\n                      <jats:italic>Streptococcus mutans<\/jats:italic>\n                      and\n                      <jats:italic>Lactobacillus<\/jats:italic>\n                      species with and without the use of probiotics for six-months after the treatment of all dental caries under general anesthesia.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      Fifty-eight pediatric patients without any systemic diseases, whose dental treatments were completed under general anesthesia (GA), were included in the study. The patients were recruited in two-groups; Group A: Patients started using probiotics after GA and Group B: Patients did not use probiotics after GA. Saliva samples were taken from all patients on the day before GA (T0), at one-month (T1), three-month (T2) and six-month (T3) follow-up after GA. The counts of cariogenic bacteria were determined by the analysis of saliva samples using real-time polymerase chain reaction. Statistical significance level was accepted as\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.05.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      There was statistically significant difference between Group A and B for T0, T1, T2 and T3 regarding\n                      <jats:italic>S. mutans<\/jats:italic>\n                      (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.001,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.04,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.04,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.03;\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.05). However, there was no statistically significant difference between groups regarding\n                      <jats:italic>Lactobacillus<\/jats:italic>\n                      species (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009\u2265\u20090.05).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>\n                      Probiotic use and treatment of all caries significantly reduced the level of\n                      <jats:italic>S. mutans<\/jats:italic>\n                      but not\n                      <jats:italic>Lactobacillus<\/jats:italic>\n                      species. Furthermore,\n                      <jats:italic>S. mutans<\/jats:italic>\n                      decreased after cessation of probiotics, but it was not statistically significant.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Trial registration<\/jats:title>\n                    <jats:p>\n                      Study was registered as \u201cEffects of Probiotics on\n                      <jats:italic>Streptococcus mutans<\/jats:italic>\n                      and\n                      <jats:italic>Lactobacillus species<\/jats:italic>\n                      \u201d with the registration number of NCT05859646 (16\/05\/2023) at\n                      <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/www.clinicaltrials.gov\">https:\/\/www.clinicaltrials.gov<\/jats:ext-link>\n                      Protocol Registration and Results System.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s12903-024-04659-y","type":"journal-article","created":{"date-parts":[[2024,8,2]],"date-time":"2024-08-02T13:04:20Z","timestamp":1722603860000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Evaluation of probiotics\u2019 efficiency on cariogenic bacteria: randomized controlled clinical study"],"prefix":"10.1186","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7850-2375","authenticated-orcid":false,"given":"Didem","family":"Sakaryal\u0131 Uyar","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1872-028X","authenticated-orcid":false,"given":"Aylin","family":"\u00dcsk\u00fcdar G\u00fc\u00e7l\u00fc","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1966-3907","authenticated-orcid":false,"given":"Ekin","family":"\u00c7elik","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3291-6174","authenticated-orcid":false,"given":"Bet\u00fcl","family":"Memi\u015f \u00d6zg\u00fcl","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0451-0142","authenticated-orcid":false,"given":"Aylin","family":"Altay Ko\u00e7ak","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2571-0637","authenticated-orcid":false,"given":"Ahmet Celal","family":"Ba\u015fustao\u011flu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,8,2]]},"reference":[{"key":"4659_CR1","doi-asserted-by":"publisher","first-page":"16","DOI":"10.1016\/j.jdent.2016.03.002","volume":"48","author":"D Gruner","year":"2016","unstructured":"Gruner D, Paris S, Schwendicke F. 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