Could a chitosan toothpaste beat cavity protection? new trial aims to find out

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Male or female, aged 18-70 years (inclusive). * Available for the duration of the study. * Able to understand and willing to read and sign the Informed Consent Form after the nature of the study has been fully explained. * Willing to comply with all study procedures and clinical examination schedules. * Good general health (absence of any condition that, in the opinion of the study examiner, might pose risk during participation; e.g., certain heart conditions, valve/hip replacements). * Presence of at least 20 natural teeth (excluding third molars) with scorable facial and lingual surfaces. * Mean Modified Gingival Index (MGI, Lobene) ≥ 2.0 and Mean Modified Plaque Index (MPI, Turesky) ≥ 1.5 at screening. * Willing and able to complete study questionnaires on product usage experience during routine toothbrushing. Exclusion Criteria: * Pregnant or lactating. * Use of tobacco products. * History of alcohol or drug abuse. * Any medical condition (e.g., significant heart or liver disease, bleeding disorders, blood dyscrasias) or current medication use that, in the investigator's judgment, may compromise subject safety or the quality of study results. * Medical condition requiring pre-medication prior to dental visits/procedures. * History of allergy to oral hygiene products. * Use of anti-inflammatory, immunosuppressive, antimicrobial, or anticoagulant drugs, or antibiotics within 30 days prior to study start or during the study. * Ongoing use of medications known to affect gingival tissues (e.g., calcium channel blockers, phenytoin, cyclosporine). * Presence of orthodontic bands or removable partial dentures. * Tumors of the soft or hard tissues of the oral cavity. * Five or more carious lesions requiring immediate restorative treatment. * More than two periodontal pockets (\>4 mm) with bleeding on probing. * Any gingival condition (e.g., hyperplasia or overgrowth) that would interfere with clinical assessment. * Participation in another clinical study with an oral care indication or test panel within 30 days prior to study start. * Medical condition that prohibits abstaining from eating or drinking for up to 2 hours.