“…Oral hygiene practices focus on the use of tooth brushing, interdental aides, and mouthwashes to limit the accumulation of microbial plaque. Twelve trials tested the efficacy of tea tree oil for control of microbial plaque on the tooth surface (Groppo et al, 2002;Saxer et al, 2003;Soukoulis and Hirsch, 2004;Prabhakar et al, 2009;Chandrdas et al, 2014;Rahman et al, 2014;Salvatori et al, 2017;Casarin et al, 2019;Bharadwaj et al, 2020;Kamath et al, 2020;Reddy et al, 2020;Ripari et al, 2020). Outcomes assessed in these trials included plaque indices or scores (Saxer et al, 2003;Soukoulis and Hirsch, 2004;Rahman et al, 2014;Salvatori et al, 2017;Casarin et al, 2019;Bharadwaj et al, 2020;Reddy et al, 2020;Ripari et al, 2020), gingival indices (Soukoulis and Hirsch, 2004;Salvatori et al, 2017;Bharadwaj et al, 2020;Kamath et al, 2020;Reddy et al, 2020;Ripari et al, 2020), bleeding indices or scores (Saxer et al, 2003;Soukoulis and Hirsch, 2004;Rahman et al, 2014;Salvatori et al, 2017;Ripari et al, 2020), salivary Streptococcus mutans (S. mutans) count (Groppo et al, 2002;Prabhakar et al, 2009;Chandrdas et al, 2014;Kamath et al, 2020) or, in one study, salivary Lactobacillus count (Prabhakar et al, 2009).…”