Pseudomonas Aeruginosa is a Gram-negative anaerobic bacterium that is part of the normal flora of the oral cavity, where it can be found in dental plaque, gingival crevices, and other oral surfaces, but it has also been associated with various oral diseases, including peri-implantitis and systemic diseases, including severe life-threatening infections.

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Carvalho ÉBS, Romandini M, Sadilina S, Sant’Ana ACP, Sanz M. Microbiota associated with peri-implantitis-A systematic review with meta-analyses. Clin Oral Implants Res. 2023;34:1176–87. doi: 10.1111/clr.14153.