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Topographic distribution of subgingival plaque along root surfaces of human periodontally diseased teeth
Author(s) -
Crespi Roberto,
Covani Ugo,
Margarone Joseph E.,
Andreana Sebastiano
Publication year - 1996
Publication title -
journal of clinical periodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.456
H-Index - 151
eISSN - 1600-051X
pISSN - 0303-6979
DOI - 10.1111/j.1600-051x.1996.tb00596.x
Subject(s) - coronal plane , periodontal disease , dental plaque , dentistry , biology , anatomy , medicine
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.