A Clinical Study to Evaluate Effects of an Oral Rinse on Plaque and Gingivitis

Inclusion Criteria: * Subjects to whom these criteria apply will be entered into the 7-day washout * Able to understand and willing to sign the Informed Consent * In good general health ages 18 and older * Have at least 20 natural teeth, including at least one molar and one premolar in each quadrant but excluding the third molars * Willing to return to the study facility for scheduled study visits and recalls * Agree not to use other oral hygiene products (non-study toothpaste, dental floss, mouth rinse, chewing gum) * Agree not to brush or floss teeth after 10:00 pm the night before and not eat or drink 4 hours before an appointment * Agree to the study instructions and visit schedule, including no eating or drinking for 4 hours before assessment appointments Subjects must meet the screening inclusion criteria and these additional requirements for enrollment: * Completed the washout period (at least 7 days) using only the study toothbrush, dental floss and toothpaste * A qualifying baseline GI of at least 1.0, as determined by the Löe-Silness Gingival Index (GI) * A qualifying baseline Modified Quigley-Hein (Lobene-Soparkar Modification of Turesky's modification) Plaque Index (PI) of at least 1.5 Subjects will be excluded if they do not meet the screening exclusion criteria. Exclusion Criteria: * Subjects to whom these conditions apply will be excluded: * A history of antibiotic therapy within the previous 30 days or have a condition that is likely to need antibiotic treatment over the course of the study (eg, cardiac conditions requiring antibiotic prophylaxis such as heart murmurs, pacemakers, or prosthetic heart valves, and prosthetic implants) * A history of using antimicrobial oral mouth rinse during the past 3 months * Taking medications which may alter gingival appearance/bleeding * Use of anticonvulsants, calcium channel blockers, or other medications with side effects known to impact oral health * Current participation in any other clinical study within the past 30 days * Reside in the same household with a subject already enrolled in the study * Dry mouth due to head/neck radiation therapy * Orthodontic appliances * Widespread caries or chronic neglect * Gross pathological changes of oral soft tissues * Known history of sensitivity to oral hygiene products * Advanced periodontal disease (purulent exudate, tooth mobility, and/or extensive alveolar bone loss) * Pregnant or nursing or plan to become pregnant within the 6 month study duration * Medical and oral conditions that, in the investigator's judgment, may compromise the subject's safety or interfere with the conduct and outcome of the study * Difficult to be compliant with study visits, such as extensive travel commitments or lack of transportation