Abstract

ARDILA MEDINA, C.M.; ALZATE VEGA, J.  and  GUZMAN ZULUAGA, I.C.. Association of Prevotella intermedia/nigrescens, gram-negative enteric rods and clinical parameters in chronic periodontitis. Avances en Periodoncia [online]. 2013, vol.25, n.3, pp.165-170. ISSN 2340-3209.

Introduction: The relationships between Prevotella intermedia/nigrescens and gram-negative enteric rods in subgingival plaque of patients with periodontitis has received little attention in the literature. Objective: The objective of this study was to explore the relationships between P. intermedia/nigrescens, gram-negative enteric rods and clinical parameters of patients with chronic periodontitis. Materials and Methods: Clinical parameters and occurrence of P. intermedia/nigrescens and gram-negative enteric rods were examined in 76 patients with chronic periodontitis. Chi-square and Mann-Whitney tests were used to determine differences in clinical variables versus the presence or absence of both microorganisms. Correlations among microorganisms studied and clinical data were determined using Spearman rank correlation coefficient. Results and conclusions: P. intermedia/nigrescens and gram-negative enteric rods were detected in 46.7% and 26.31% individuals, respectively. A total of 22% of patients harbored the microorganisms studied. There were significantly positive correlations between P. intermedia/nigrescens and gram-negative enteric rods (r=0.286, p<0.0001). The microorganisms studied were significant and positively correlated with probing depth (PD), clinical attachment level and bleeding on probing (r=0.362; 0.358; 0.079; p<0.0001). The mean PD (mm) and clinical attachment loss of the sampled sites was significantly higher in patients with presence of P. intermedia/nigrescens and gram-negative enteric rods. The adverse clinical parameters observed in presence of these microorganisms could have implications in the pathogenesis of periodontal disease and a possible impact on outcomes after treatment.

Keywords : Chronic periodontitis; Prevotella intermedia/nigrescens; gram-negative enteric rods.

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