background. this study was designedaimed to investigate assess the antimicrobial antimicrobial eeffect of chlorhexidine (chx) on aggregatibacter a. actinomycetemcomitans biofilmss extracted isolated from subgingival plaque of periperi-iimplantitis lesions. methods. 13 thirteen participants patients requiring peri-implantitis treatment were consecutively selected and theirwere consecutively recr...