The aim of this study was to investigate the association between expressions of five periodontal pathogens (Actinobacillus actinomycetemcomitans (Aa). Porphyromonas gingivalis (Pg). Tannerella forsythensis (Tf). Treponema denticola (Td) and Prevotella intermedia (Pi) and the periodontal pocket depth (PD) in people suffering from periodontitis. http://fitnessgravesyardes.shop/product-category/right-pedal-arm/