Microbiota analysis of peri-implant mucositis in patients with periodontitis history

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Abstract
Objectives: To investigate the bacterial diversity in peri-implant plaques and the effect of periodontitis history on the occurrence of peri-implant mucositis.Materials and methods: Three groups of subgingival plaques were collected from peri-implant sulci in the first molar area. The three groups included healthy implants in patients without periodontitis (NH implant), healthy implants in patients with periodontitis history (PH implant), and peri-implant mucositis implants in patients with periodontitis history (PM implant). Subgingival plaques in periodontal pockets of contralateral natural first molars were also collected. Bacterial DNA was extracted and the V4 region of the 16S rDNA sequence was amplified and sequenced on an Illumina HiSeq platform. The operational taxonomic units obtained from amplicon sequencing were used to analyze the prevalence and identity of bacteria based on public databases and advanced techniques.Results: Analysis of similarities indicated a significant difference in bacterial structures between the NH implant and PM implant groups. Additionally, a significantly higher relative abundance of the generaActinomycesandStreptococcuswas found in the samples of the NH implant group. The generaFusobacteriumandPrevotellacould be considered as potential biomarkers for peri-implant mucositis. Moreover, more gram-negative anaerobic bacteria (PorphyromonasandPrevotella) were detected in the samples from patients with periodontitis history.Conclusions: The increased accumulation ofFusobacteriumandPrevotellais associated with a higher risk of peri-implant mucositis. In addition, patients with periodontal history may be more likely to develop peri-implant mucositis.Clinical relevance: The increase in periodontal pathogens and the decrease in health-associated bacteria in patients with periodontitis history may be more likely to develop peri-implant mucositis. These results provide a bacteriological basis for the prevention and treatment of peri-implant mucositis in patients with periodontitis history.
Funding Information
  • National Natural Science Foundation of China (81571800)
  • foundation for development of science and technology of nanjing (201803036)
  • key project of re-search and development plan of jiangsu province (BE2020629)
  • development of science and technology of Nanjing (YKK19094)

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