Copaiba balsam, derived from the resin of Copaifera species, has been traditionally used in South American folk medicine for its purported anti-inflammatory and antimicrobial properties. Its application in oral health, specifically for conditions like gingivitis, is based on these traditional uses. Historically, indigenous communities have employed Copaiba oil for treating wounds and infections, including those of the mouth, to reduce inflammation and promote healing.

Modern scientific research on Copaiba balsam's efficacy for gingivitis is limited. Some in vitro studies suggest that Copaiba oil exhibits antimicrobial activity against oral pathogens, such as Streptococcus mutans and Porphyromonas gingivalis, which are implicated in gingivitis. Additionally, animal studies and limited human trials indicate potential anti-inflammatory effects. However, these studies are preliminary, with small sample sizes and methodological limitations. There is a lack of robust, large-scale clinical trials directly assessing Copaiba balsam's effectiveness in preventing or treating gingivitis in humans.

In summary, the use of Copaiba balsam for gingivitis is primarily grounded in traditional medicine, with some emerging but weak scientific evidence supporting its antimicrobial and anti-inflammatory actions relevant to gum health. More rigorous clinical research is needed to substantiate its therapeutic value for gingivitis.