Does Daily Intake of Matcha Tea Enhance The Periodontal Health of Patients With Localised Gingivitis: A Control Study.

IF 1.4 4区医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

Oral health & preventive dentistry Pub Date : 2025-09-11 DOI:10.3290/j.ohpd.c_2268

Rasha Salah Abood, Firas Bashir Hashim Al-Taweel, Hadeel Mazin Akram, Hayder Raad Abdulbaqi

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Abstract

Background: Gingivitis is a reversible, dental biofilm-induced inflammation which is characterised by bleeding on probing (BOP) and oxidative stress in the gingival tissues. Matcha tea, a type of green tea with high antioxidant content, has been reported to enhance periodontal health, but its exact beneficial efficacy remains to be investigated.

Objective: This pilot-controlled trial aimed to investigate the influence of daily consumption of matcha tea on gingival status and salivary 8-hydroxy-deoxyguanosine (8-OHdG) concentration in localised gingivitis patients, as well as to determine the bleeding on probing (BOP) threshold that predicts for gingival health after intervention.

Methods: Twenty-seven adults with localised gingivitis (BOP >10% but ≤30%) drank matcha tea twice a day for 30 days while maintaining oral hygiene habits. Clinical parameters, including plaque index (PI) and BOP, as well as salivary 8-OHdG, were evaluated at baseline and post-intervention. After treatment, patients with BO 10% were reassigned as healthy, and those with BOP ≥10% as gingivitis. Regression and correlation analyses, including the Wilcoxon and Mann-Whitney test, ANCOVA, and receiver operating characteristics (ROC) curve, were performed to determine a BOP cut-off value that would predict gingival health.

Results: PI, BOP, and 8-OHdG were statistically significantly decreased in the entire cohort after 1 month. Patients reassigned as healthy underwent a greater reduction in PI (from 28.3 ± 7.5 to 17.5 ± 5.3), BOP (from 16.4 ± 5.0 to 5.6 ± 2.5) and 8-OHdG (from 6.9 ± 1.6 to 5.6 ± 1.8 ng/ml). In contrast, patients with gingivitis had statistically significant reductions in PI and BOP, but not in 8-OHdG. The mean BOP reduction was statistically significantly higher in healthy subjects. A ROC calculation revealed a BOP cut-off 18% at baseline, indicating a high likelihood of achieving gingival health following ingestion of the matcha tea (sensitivity = 0.92, specificity = 0.70).

Conclusion: Daily intake of matcha tea for 1 month improved gingival health and decreased oxidative stress markers in the localised gingivitis patients. A 18% baseline BOP predicted successful transition to gingival health after intervention. These results corroborate the adjuvant therapy of matcha tea in the treatment of gingivitis, and further large-scale randomised trials are recommended.

Source of funding: No external funding was received.

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每日摄入抹茶是否能改善局部牙龈炎患者的牙周健康：一项对照研究

背景：牙龈炎是一种可逆性的，由牙齿生物膜引起的炎症，其特征是牙探出血（BOP）和牙龈组织的氧化应激。抹茶是一种抗氧化剂含量高的绿茶，据报道可以促进牙周健康，但其确切的有益功效仍有待研究。目的：本试验旨在探讨每日饮用抹茶对局部牙龈炎患者牙龈状态和唾液8-羟基-去氧鸟苷（8-OHdG）浓度的影响，并确定干预后预测牙龈健康的探诊出血（BOP）阈值。方法：27例局部牙龈炎患者（BOP = 10%但≤30%）在保持口腔卫生习惯的情况下，每天饮用抹茶2次，连续30天。临床参数，包括斑块指数（PI）和BOP，以及唾液8-OHdG，在基线和干预后进行评估。治疗后，BOP≥10%的患者被重新归类为健康患者，BOP≥10%的患者被重新归类为牙龈炎患者。采用回归和相关分析，包括Wilcoxon和Mann-Whitney检验、ANCOVA和受试者工作特征（ROC）曲线，以确定预测牙龈健康的BOP临界值。结果：1个月后，整个队列的PI、BOP和8-OHdG均有统计学意义的降低。重新分配为健康的患者的PI（从28.3±7.5降至17.5±5.3），BOP（从16.4±5.0降至5.6±2.5）和8-OHdG（从6.9±1.6降至5.6±1.8 ng/ml）的下降幅度更大。相比之下，牙龈炎患者的PI和BOP有统计学意义上的降低，但8-OHdG没有。健康受试者的平均BOP降低在统计学上显著更高。ROC计算显示，基线BOP截止值为18%，表明摄入抹茶后实现牙龈健康的可能性很高（敏感性= 0.92，特异性= 0.70）。结论：每日摄入抹茶1个月可改善局部牙龈炎患者的牙龈健康，降低氧化应激标志物。18%的基线BOP预测干预后成功过渡到牙龈健康。这些结果证实了抹茶在治疗牙龈炎中的辅助治疗作用，并建议进一步进行大规模随机试验。资金来源：未收到外部资金。

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来源期刊

Oral health & preventive dentistry DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

3.00

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Clinicians, general practitioners, teachers, researchers, and public health administrators will find this journal an indispensable source of essential, timely information about scientific progress in the fields of oral health and the prevention of caries, periodontal diseases, oral mucosal diseases, and dental trauma. Central topics, including oral hygiene, oral epidemiology, oral health promotion, and public health issues, are covered in peer-reviewed articles such as clinical and basic science research reports; reviews; invited focus articles, commentaries, and guest editorials; and symposium, workshop, and conference proceedings.