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The intervention group rinsed the mouth with 100 ml green tea solution for 60 seconds at least twice daily.

The control group rinsed the mouth with 100 ml tap water for 60 seconds at least twice daily.

All patients received instructions for using the Bass brushing method to brush their teeth with a soft small-headed toothbrush. The intervention group rinsed the mouth with 100 ml green tea solution for 60 seconds at least twice daily. For the preparation of the green tea mouthwash, green tea solution was made with 5 g (1 teaspoon) of green tea powder dissolved in 100 ml water to produce 5% green tea mouthwash, as described in a previous study (Eshghpour, et al., 2013). The green tea powder was ground from Camelia sinensis leaves and regularly provided by the researcher. The green tea solution is made for a single use and remade before rinsing each time. When patients return to the outpatient monthly, the researcher first confirms patients' compliance, then assists with solving difficulties and gives encouragement.

mouthwash with green tea

All patients received instructions for using the Bass brushing method to brush their teeth with a soft small-headed toothbrush. The control group rinsed the mouth with 100 ml tap water for 60 seconds at least twice daily.

mouthwash with tap water group

Objectives: To evaluate the effectiveness of green tea mouthwash on the oral health status (OHS) in oral cancer patients undergoing anticancer treatment.

Materials and methods: This was a prospective, single-blind, randomized, controlled trial. Patients were randomly assigned to 2 groups: mouthwash with green tea (intervention) group or tap water (control) group. The intervention group rinsed the mouth with 100 ml green tea solution for 60 seconds at least twice daily, and the control group rinsed the mouth with 100 ml tap water for 60 seconds at least twice daily. The primary outcome was OHS, which was evaluated according to the Oral Assessment Guide and measured at seven time points by the same researcher. Time 0 (T0) corresponded to baseline, and Time 1-6 (T1-T6) corresponded to monthly outpatient follow-ups until six months.

Patients were randomly assigned to 2 groups: mouthwash with green tea (intervention) group or tap water (control) group. The intervention group rinsed the mouth with 100 ml green tea solution for 60 seconds at least twice daily, and the control group rinsed the mouth with 100 ml tap water for 60 seconds at least twice daily.

Because of the nature of the intervention, only the data analyst was blinded to the meaning of the group assignment code.

Green Tea Mouthwash on the Oral Health Status in Oral Cancer Patients

Effectiveness of Green Tea Mouthwash on the Oral Health Status in Oral Cancer Patients: A Single-blind Randomized Clinical Trial and a CONSORT-compliant Article

Patients' oral health status (OHS) was assessed according to the Oral Assessment Guide (OAG) by the same researcher. The OAG consists of eight items: voice, swallow, lips, tongue, saliva, mucous membranes, gingiva and teeth or dentures. Each item is rated by a grading of 1 (normal) to 3 (severe). Sum scores between 8-24 points and a higher score indicate poorer OHS.

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization
Green Tea Mouthwash on the Oral Health Status in Oral Cancer Patients	NCT04615780	Oral Cancer	mouthwash with ... mouthwash with ...	20 Years -	Chiayi Christian Hospital
Green Tea Mouthwash on the Oral Health Status in Oral Cancer Patients	NCT04615780	Oral Cancer	mouthwash with ... mouthwash with ...	20 Years -	Chiayi Christian Hospital
Green Tea Mouthwash on the Oral Health Status in Oral Cancer Patients	NCT04615780	Oral Cancer	mouthwash with ... mouthwash with ...	20 Years -	Chiayi Christian Hospital

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