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:: Volume 36, Issue 3 (Summer 2018 2018) ::
J Dent Sch GYEAR__, 36(3): 81-85 Back to browse issues page
Different effect of green tea consumption on salivary antioxidant status in light versus heavy smokers
Somayyeh Azimi1 , Zahra Mansouri2, Sedigheh Bakhtiari * 3, Mahshid Namdari4 , Elham Sadat Afraz2
1- International Research Collaborative, Oral Health and Equity ,School of Anatomy, Physiology and Human Biology, University of Western Australia, WA, Crawley, Australia
2- Dept. of Oral Medicine, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
3- Dept. of Oral Medicine, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran , sbakhtiari2007@yahoo.com
4- Dept. of Biostatistics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
Abstract:   (996 Views)

Objectives Oxidative stress consequent to cigarette smoking may alter the salivary antioxidant defense system and lead to oral cancer. Green tea, with antioxidant properties, interacts with saliva upon entering the mouth. This experimental study explored the preventive effect of green tea on cigarette smoke-induced oxidative damage over 3 weeks.
Methods In this clinical trial study sixty volunteer healthy male smokers (light and heavy) and non-smokers were selected according to the inclusion criteria. Participants of each three groups were instructed to drink 4g of green tea (prepared with 300 ml hot water) daily, for three weeks. Total antioxidant capacity of saliva was measured at baseline, after 7 days, and after 21 days in each group. Repeated measure ANOVA with Bonferroni adjustment was performed for statistical analysis.
Results Non-smokers had a higher amount of salivary total antioxidant capacity at baseline (p<0.001). After 7days of green tea consumption total antioxidant capacity of non-smokers and light smokers showed no statistical difference (p=0.075), this trend continued until 21 days. In the heavy smokers total antioxidant capacity was still different from the other two groups (p<0.001). However, the maximum positive alteration of salivary total antioxidant capacity from day zero to day 21 occurred in the heavy smoker group (p< 0.001).
Conclusion Although findings support the role of green tea drinking in reducing oxidative damage in saliva of both groups of smokers, heavy smokers showed the most significant change in total antioxidant capacity levels over three weeks.

Keywords: Antioxidant, Green tea, Saliva, Smokers
Full-Text [PDF 373 kb]   (223 Downloads)    
Type of Study: Original Article | Subject: Special
Received: 2019/01/5 | Accepted: 2019/01/5 | Published: 2019/01/5
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Azimi S, Mansouri Z, Bakhtiari S, Namdari M, Afraz E S. Different effect of green tea consumption on salivary antioxidant status in light versus heavy smokers. J Dent Sch. 2018; 36 (3) :81-85
URL: http://jds.sbmu.ac.ir/article-1-1695-en.html


Volume 36, Issue 3 (Summer 2018 2018) Back to browse issues page
مجله دانشکده دندانپزشکی دانشگاه علوم پزشکی شهید بهشتی Shahid Beheshti University Dental Journal
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