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Introduction: Patients undergoing orthodontic therapy face greater difficulties in maintaining good oral hygiene. To improve mechanical plaque removal, a common strategy is to incorporate a chemotherapeutic agent. Thus, the effects of adding essential oil mouthwash to a standard oral hygiene regimen to maintain oral health were evaluated.Material and Method: Two groups were created with 25 patients each. Gingival index and orthodontic plaque index were calculated as initial reading. Gingival index and orthodontic plaque index were calculated again after 6 months.Result: In the control group, the mean score of gingival index and orthodontic plaque index were significantly increased from baseline reading (T1) to after 6 months reading (T2). In the experimental group, increase in the mean score of gingival index and orthodontic plaque index was not statistically significant.Conclusion: When an essential oil mouthwash is added to the daily oral hygiene regimen (conventional manual toothbrushing + brushing with monotufted brush), it maintained the gingival health and amount of plaque accumulation in orthodontic patients over a period of 6 months.