Scope: The present study aims at identifying the similarities between the peri-implantitis microbiota and periodontal sites in patients affected by periodontal diseases.
Material and method: As a prospective study, the investigation followed colonization of the periimplantary sulcuses created at 42 partially edentulous patients with periodontopathic antecedents. The working hypothesis was that a subgingival plaque content undergoing maturation in the peri-implantary sites will be immediately (within 2 weeks) comparable to the microbiotis from the periodontal sites, with similar clinical parameters (reference sites), the presence of bacteria associated with the periodontal malady included. For each patient, 4 subgingival plaque samples were taken over from the superficial and middle sites surrounding the implants (test sites), as well as from the periodontal sites, in the teeth from the same quadrant (unmodified microbiotis, as control sites). The samples were analyzed by the AND hybridization method.
Results and discussion: ADN hybridization put into evidence a complex microbiotis (some pathogenic species included) in the peri-implantary sites, in the first 2 weeks after being connected to fixed prosthetic elements. After 7 days, the frequency of detection for most of the species (bacteria associated with periodontal diseases included) was already almost identical in the samples from the immediate peri-implantary sites (i.e., 5 and 20% of the microbiotis belonging to the red and, respectively orange complex), when compared with samples from the periodontal sites of the reference teeth. Later on (e.g., between the 2nd and the 12th week), the number of bacteria in the peri-implantary sites increased only slightly (0.1 basal value), with minor modifications in the relative ratio of bacteria associated with the periodontal malady (8 and 33% of the microbiotis belonging to the red and orange complexes, respectively). Conclusions: The present study indicates that, initially, colonization of the peri-implantary sites with bacteria associated with the periodontal malady occurs within 2 weeks. The patients with a pre-existening periodontal suffering represent a risk for peri-implantitis development, which is quite a serious situation, once known that colonization of the peri-implantary pockets involves periodontal pathogenic agents.
- oral microbiotis