Polson, A M Multi-center comparative evaluation of subgingivally delivered sanguinarine and doxycycline in the treatment of periodontitis. I. Study design, procedures, and management. [electronic resource] - Journal of periodontology Feb 1997 - 110-8 p. digital Publication Type: Clinical Trial; Journal Article; Multicenter Study; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 0022-3492 Standard No.: 10.1902/jop.1997.68.2.110 doi Subjects--Topical Terms: Administration, TopicalAdultAgedAlkaloids--administration & dosageAnalysis of VarianceAnti-Bacterial Agents--administration & dosageAnti-Infective Agents, Local--administration & dosageBenzophenanthridinesBiodegradation, EnvironmentalDental Research--methodsDouble-Blind MethodDoxycycline--administration & dosageDrug Delivery SystemsFemaleHumansIsoquinolinesMaleMiddle AgedPeriodontitis--drug therapyPolyestersRegression AnalysisResearch Design