The search yielded 2581 unique papers, after selection resulted in 12 publications that met the eligibility criteria. In general, the available definitions are found to be unclear and sometimes inconsistent. However, based on the available literature, the three biotypes thin scalloped, thick flat and thick scalloped seem a comprehensive categorization in defining periodontal biotypes in the population. The dental, gingival and osseous dimensions have a weak to moderate association. Only between gingival thickness, keratinized tissue and bone morphotype uniform positive associations are found.

Red autofluorescence of plaque and its relation to fluorescence of a single species in the biofilm was studied. Fluorescence images of non-disclosed and disclosed plaque of 28 first-year students were captured. The plaque samples were assessed by culture methods and studied for red autofluorescence. Species capable of producing red autofluorescence were cultivated from subjects with and without red plaque autofluorescence. Red autofluorescence was observed from Actinomyces odontolyticus, Prevotella intermedia and from Porphyromonas gingivalis and Peptostreptococcus micros grown together. The microbial findings indicated that the intrinsic characteristics of the mature biofilm itself are more responsible for the red autofluorescence than the characteristics of the single species.

The higher proportion of caries-associated bacteria on restored tissue indicates that the ecology on the surface of primary lesions differs from that on lesions next to composite, and that secondary caries next to composite may differ from the primary caries process.

No abstract