Abstract
The present prospective open cohort study of 6 years of follow-up within a periodontal maintenance therapy program will evaluate in 56 subjects paired by gender (50% females) and age the levels of A. actinomycetemcomitans (A); the occurrence and distribution of a-b-c-d-e-f-g serotypes (B); the prevalence and distribution of A. actinomycetemcomitans JP2 and Non JP2 clones (C); detection of…