ArticleCureus2026
Influence of Implant Positioning on Peri-Implant Colonization by Porphyromonas gingivalis and Fusobacterium nucleatum: A Prospective Longitudinal Observational Cohort Study.
Article in Cureus, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionPeri-implant microbial colonization plays a critical role in the maintenance of peri-implant tissue health and the development of peri-implant diseases. Implant positioning relative to crestal bone may influence the peri-implant microenvironment and affect the accumulation of pathogenic microorganisms. However, limited evidence is available regarding the relationship between implant placement depth and the prevalence of key periodontal pathogens. The present study aimed to evaluate and compare the prevalence and quantitative levels of MATERIALS AND
methodsThis prospective longitudinal observational cohort study included 40 participants with functional dental implants, including 20 subcrestal and 20 supracrestal implants. Peri-implant clinical parameters, including probing pocket depth (PPD), bleeding on probing (BOP), plaque index, and radiographic bone loss, were recorded. Peri-implant crevicular fluid samples were collected from sterile paper points and subjected to genomic DNA extraction. Quantitative real-time polymerase chain reaction (qPCR) was performed to detect and quantify
resultsBaseline demographic and clinical characteristics were comparable between the subcrestal and supracrestal implant groups, with no significant differences in age, sex, smoking status, implant location, PPD, BOP, plaque index, or radiographic bone loss (all p > 0.05). At 12 months,
conclusionsSupracrestal implant placement is associated with increased colonization by periodontal pathogens and stronger relationships between bacterial burden and peri-implant tissue deterioration. Subcrestal implant placement may provide a more favorable microbiological environment and contribute to improved peri-implant tissue health.
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