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Green tea relieves erosive, atrophic, and ulcerative lesions in patients with oral lichen planus: a pilot clinical trial study

(3). Erosive OLP is the most advanced type of OLP Materials & Methods
with atrophic and erythematous ulcers covered by Participants:
pseudomembrane, mucosal erosion, and white lace-like The present pilot clinical trial study included 10
patterns (4). About 0.4-3.7% of lesions develop patients (aged between 37-65 years), with at least one
malignancy, and atrophic and erosive types have more clinical and histopathological proven OLP lesion, who
malignancy potential, resulting in a worse prognosis (5, were referred to the Department of Oral Medicine,
6). Although the etiology of OLP is still unknown, the Urmia Dental School, Urmia, Iran. The exclusion
dysregulation of the T-cell-mediated immune system is criteria entailed the presence of any visible oral lesion
the most likely cause of this condition (7, 8). It has other than OLP, pregnant or breast-feeding women,
been demonstrated that the upregulation of cytokines, immunodeficiency diseases, current malignancy or
such as tumor necrosis factor-α, interferon-, and IL-1, malignancy in history, severe or recurrent infections,
is mostly responsible for the occurrence of OLP (9, lichenoid reaction, patients with allergy to botanical
10). products, topical treatment or systemic therapy of OLP
Even though various therapeutic approaches have for one month before starting the study, increased
been provided to reduce pain and heal the lesions, blood pressure, ulcerative colitis, and history of organ
corticosteroids have been the most common drug for transplant. All the patients signed an informed consent
OLP management (11). Other treatment modalities, before the initiation of the study. This study was
e.g. calcitonin inhibitors, immunostimulators, retinoids, approved by the Ethics Committee of Urmia University
low-level laser therapy, and photodynamic therapy, of Medical Sciences (ethical code: 2852-35.-01-1395).
have also been used to treat OLP (12). However,
despite the common use of corticosteroids, various side Interventions:
effects may occur, including adrenal suppression, All the patients were asked to use green tea tablets
secondary candidiasis, and increased blood pressure (450 mg) daily for 30 days. The severity of pain, lesion
(11). Following the side effects reported, many herbal size, and lesion number were investigated 30 days after
drugs with anti-inflammatory and antioxidant effects interventions. The severity of pain and burning
have been suggested for the management of OLP (13). sensation was assessed by visual analog scale (VAS)
Green tea is a popular drink known for its before and after interventions. In addition, lesion size
immunomodulation effects. It has also shown anti- was investigated according to the Thongprasom
inflammatory, anti-oxidative, anti-carcinogenic, criteria.
antimicrobial, antihypertensive and antidiabetic
properties. Green tea has been recognized to have Statistical analysis:
minimum toxicity and side effects and is safe for a The obtained data were analyzed by statistical
wide range of patients (14, 15). Its anti-inflammatory package for the social sciences (SPSS version 22)
activity is performed through downregulating critical software and presented as percentages, frequencies,
inflammatory mediators and increased production of mean, and standard deviation (mean ± SD). The
anti-inflammatory cytokines (16, 17). difference between baseline and after interventions was
OLP is one of the common inflammatory diseases analyzed by Mann-Whitney and analysis of variance
of oral mucosa and corticosteroids and has various side (ANOVA).
effects on reducing pain and clinical symptoms.
However, no study has been found to use green tea to Results
manage OLP. Accordingly, this study aimed to Demographic and clinical characteristics:
evaluate the efficiency of green tea tablets in the The present study included 10 patients (6 females
management of OLP. and 4 males) with OLP in the age range of 37-65 years

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