Which type of rinse can help control subgingival plaque?

Chlorhexidine gluconate is the correct answer as it is a powerful antimicrobial agent that specifically targets bacteria in the oral cavity, including those associated with subgingival plaque. Its use is particularly beneficial in managing periodontal diseases as it reduces bacteria at and below the gum line, helping to control plaque accumulation effectively. Chlorhexidine is often recommended following periodontal therapy or surgery due to its prolonged antimicrobial action and ability to reduce inflammation in the gums.

While alcohol-based mouthwashes and essential oil mouthwashes can have some antibacterial properties, they do not have the same level of efficacy against subgingival plaque as chlorhexidine. Fluoride rinses are excellent for caries prevention but do not directly address plaque control, particularly in subgingival areas. Therefore, chlorhexidine gluconate stands out for its effectiveness in controlling subgingival plaque accumulation and improving oral health in individuals with periodontal concerns.