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Topographic distribution of subgingival plaque along root surfaces of human periodontally diseased teeth
A descriptive study
Roberto Crespi, Ugo Covani, Joseph E. Margarone,
Sebastiano Andreana,
Joseph E. Margarone
The Department of Oral and Maxillo-facial Surgery, School of Dental Medicine, State University of New York at Buffalo, Buffalo, NY, USA
Search for more papers by this authorCorresponding Author
Sebastiano Andreana
The Department of Periodontics, School of Dental Medicine, State University of New York at Buffalo, Buffalo, NY, USA
Sebastiano Andreana, Department of Periodontics, SUNY at Buffalo, 250 Squire Hall, 3435 Main Street, Buffalo, NY 14214-3092, USASearch for more papers by this authorRoberto Crespi, Ugo Covani, Joseph E. Margarone,
Sebastiano Andreana,
Joseph E. Margarone
The Department of Oral and Maxillo-facial Surgery, School of Dental Medicine, State University of New York at Buffalo, Buffalo, NY, USA
Search for more papers by this authorCorresponding Author
Sebastiano Andreana
The Department of Periodontics, School of Dental Medicine, State University of New York at Buffalo, Buffalo, NY, USA
Sebastiano Andreana, Department of Periodontics, SUNY at Buffalo, 250 Squire Hall, 3435 Main Street, Buffalo, NY 14214-3092, USASearch for more papers by this authorAbstract
Abstract The purpose of this study was to characterize the topographical distribution and organization of subgingival plaque in periodontally diseased teeth. 26 extracted teeth were fixed and processed for undecaicified histological evaluation. The sections were cut perpendicular to the long axis of the tooth and analyzed by phase-contrast microscopy. The coronal portion of the analyzed roots showed a dense accumulation of filamentous forms, fusiform rods, coccoid forms and loosely aggregated spirochetes. The middle and apical portions showed a non-uniform distribution of the microflora, with microorganisms representing all the known morphotypes. Furthermore, plaque was detected below undisturbed periodontal fibers, indicating that plaque not only forms apically, but also in a lateral direction, penetrating and colonizing below areas where periodontal fibers are inserted into the root surface.
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