{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,9]],"date-time":"2026-01-09T01:48:56Z","timestamp":1767923336658,"version":"3.49.0"},"reference-count":24,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2007,8,1]],"date-time":"2007-08-01T00:00:00Z","timestamp":1185926400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Periodontology"],"published-print":{"date-parts":[[2007,8]]},"abstract":"<jats:p><jats:bold>Background:<\/jats:bold> The objective of this trial was to measure the antimicrobial effects of a minocycline HCl microsphere (MM) local drug\u2010delivery system when used as an adjunct to scaling and root planing (SRP). DNA probe analysis for 40 bacteria was used to evaluate the oral bacteria of 127 subjects with moderate to advanced chronic periodontitis.<\/jats:p><jats:p><jats:bold>Methods:<\/jats:bold> Subjects were randomly assigned to either SRP alone (N = 65) or MM + SRP (N = 62). The primary endpoints of this study were changes in numbers and proportions of the red\u2010complex bacteria (RCB) and the sum of <jats:italic>Porphyromonas gingivalis<\/jats:italic>, <jats:italic>Tannerella forsythia<\/jats:italic> (formally <jats:italic>T. forsythensis<\/jats:italic>), and <jats:italic>Treponema denticola<\/jats:italic> relative to 40 oral bacteria at each test site from baseline to day 30. Numbers of RCB from the five test sites were averaged to provide a value for each subject.<\/jats:p><jats:p><jats:bold>Results:<\/jats:bold> MM + SRP reduced the proportion of RCB by 6.49% and the numbers by 9.4 \u00d7 10<jats:sup>5<\/jats:sup>. The reduction in RCB proportions and numbers by SRP alone (5.03% and 5.1 \u00d7 10<jats:sup>5<\/jats:sup>, respectively) was significantly less. In addition, MM + SRP reduced probing depth by 1.38 mm (compared to 1.01 mm by SRP alone), bleeding on probing was reduced by 25.2% (compared to 13.8% by SRP alone), and a clinical attachment level gain of 1.16 mm (compared to 0.80 mm by SRP alone) was achieved.<\/jats:p><jats:p><jats:bold>Conclusion:<\/jats:bold> These observations support the hypothesis that RCBs are responsible for periodontal disease and that local antimicrobial therapy using MM + SRP effectively reduces numbers of RCBs and their proportions to a greater extent than SRP alone.<\/jats:p>","DOI":"10.1902\/jop.2007.060488","type":"journal-article","created":{"date-parts":[[2007,8,1]],"date-time":"2007-08-01T09:22:59Z","timestamp":1185960179000},"page":"1568-1579","source":"Crossref","is-referenced-by-count":46,"title":["Minocycline HCl Microspheres Reduce Red\u2010Complex Bacteria in Periodontal Disease Therapy"],"prefix":"10.1002","volume":"78","author":[{"given":"J. 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