Selection of the study group: inclusion and exclusion criteria
periodontitis, bleeding, gingivitis
PERIODONTITIS, BLEEDING, GINGIVITIS
Participants were sought for voluntary enrolment in the setting of the Faculty of Medicine and Dentistry of Santiago de Compostela (Universidade de Santiago de Compostela -USC-, Spain) from October 2021 to April 2022. Two clinicians adopting a previously standardised approach evaluated all the volunteers who verified compliance with the established inclusion and exclusion criteria. The subjects chosen were systemically healthy adults aged between 20 and 45 years with a good oral health status, i.e., a minimum of 24 permanent teeth, no evidence of gingivitis or periodontitis (bleeding on probing < 10%) [