SRP329099 PRJNA747611 Salivary Microbial Dysbiosis is Associated with Peri-implantitis: a cross-sectional study in a Brazilian population The V4 hypervariable region of the 16S rRNA gene was sequenced from saliva samples collected from 21 participants with healthy peri-implant sites and 21 participants with peri-implantitis using the Ion Torrent PGM System to analyze and composition of the salivary microbiome.