An Assessment of the Clinical Efficacy of a Topical Application of 5% Thymoquinone Gel for Plaque-Induced Gingivitis Patients: A Randomized Controlled Clinical Trial.

Background: Gingival diseases, encompassing a spectrum of oral health concerns, represent a prevalent issue within the global population. Despite their widespread occurrence, the research landscape concerning effective interventions, particularly those rooted in herbal products, remains somewhat limited. Addressing this knowledge gap, the current study undertook a comprehensive evaluation aimed at assessing the clinical efficacy of a novel intervention: a 5% thymoquinone (TQ) gel. This investigation specifically focused on the application of TQ gel as an adjunctive measure to the standard protocol of scaling (SC) in individuals afflicted with plaque-induced gingivitis. Through rigorous examination and analysis, this study seeks to provide valuable insights into the potential utility and therapeutic benefits of this herbal-based intervention in managing gingival diseases.

Objective: To evaluate the efficacy of 5% TQ gel using a novel liposome drug delivery as a topical application following SC in gingivitis patients.

Methods: A double-blinded, parallel, randomized controlled clinical trial. The study was performed at the Faculty of Dentistry, King Abdulaziz University, and Qassim University, Saudi Arabia. This trial enrolled 63 participants in an age group between 18 and 40 years attending the outpatient clinics of the Faculty of Dentistry, Qassim University, Saudi Arabia, and a clinical diagnosis of gingivitis was made. The enrolled subjects were categorized into three groups: Group I-TQ gel with SC, Group II-Placebo with SC, and Group III-SC alone, and clinical outcomes were measured at baseline and two-week follow-up visits. Plaque index (PI), papillary bleeding index (PBI), and any adverse events with TQ gel are categorized as mild, moderate, and severe. 63 patients. Group I (n = 21); Group II (n = 21); Group III (n = 21).

Results: The paired -test compared the mean differences in PI and PBI at two time points and it was observed that there were significant differences in Group I with -values of 0.04 and 0.05, respectively. A one-way ANOVA test was performed and it showed significant differences in the mean scores between the three groups for PI (-value-0.01) and PBI (-value-0.05). The post hoc Tukey's test compared the mean differences in PI and PBI between the groups and the results were in favor of Group I which used TQ gel with SC.

Conclusions: The clinical trial concluded that the plaque and gingival bleeding scores were significantly reduced in the group of patients who intervened with TQ gel following SC when compared to SC-alone and placebo groups. Also, there were significant reductions in the scores from the baseline to the two-week follow-up visit in patients treated with TQ gel and SC.