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Title Polyphenols in Green Tea and Coffee Show Anti-Carious Effects
Clinical Question In an adult population, will dietary bioflavonoids found in green tea reduce risk of dental caries compared to antioxidant-rich coffee?
Clinical Bottom Line Research on bioflavonoid supplementation in vitro has shown a reduction in dental caries.
Best Evidence (you may view more info by clicking on the PubMed ID link)
PubMed ID Author / Year Patient Group Study type
(level of evidence)
#1) 19397954Ferrazzano/2009Studies on coffee and tea polyphenolsNarrative review
Key resultsCocoa and coffee polyphenols seems to deter bacterial adhesion on the surface of teeth. The polyphenols in tea exert different actions: tea slowly releases catechins and theaflavins, which slow Streptococcus growth; it can also inhibit the preliminary adherence of Sreptococcus mutans to the tooth surface.
#2) 24909065Meckelburg/2014Deciduous molars from children and saliva taken from middle-aged adultsLaboratory study
Key resultsThe study revealed the coffee species Coffea canephora had an inhibitory action against dental biofim. "C. canephora caused bacterial lysis and consequent release of calcium into the medium." However, the results indicate that the coffee extract did not show a significant difference compared the negative control, purified water, in the amount of calcium released.
#3) 19955272Signoretto/201075 dentate adults without antibiotic treatmentCross-sectional study
Key resultsCoffee, red wine, and water drinkers are shown to have different oral microbial profiles. Roasted coffees produce melanoidins, which have antioxidant activities and showed inhibitory activity against the adherence of S. mutans, S. aureus, and enterobacteria to hydroxyapatite beads.
#4) 19397954Ferrazzano/201166 patients, 12-18 years, in good physical conditionRCT
Key resultsThe infusion of green tea into a mouthwash resulted in a reduced level of salivary bacteria streptococci and lactobacci. Group A, which used the green tea-infused mouth rinse, showed a significant (P<.001) decrease in salivary streptococci and lactobacilli. Group B, which used a placebo mouth rinse, did not show a statistically significant difference in either of the bacterias.
Evidence Search Search “Dental Caries” [Mesh] Search “Antioxidants”[Mesh] Search “Bioflavonoids”[Mesh]
Comments on
The Evidence
Validity: The evidence presented in these studies appears valid and has demonstrated the potential value of bioflavonoid supplementation in helping to prevent future dental caries. There needs to be more randomized controlled studies comparing the anticaries effects of different bioflavonoids.
Applicability Coffee and green teas are readily accessible. These drinks are non-toxic and have potential anti-carious effects. Prescriptions are not necessary to access these beverages. Because of these reasons any clinician can implement these systems.
Specialty/Discipline (Public Health) (General Dentistry)
Keywords Bioflavonoids, antioxidants, green tea, coffee, dental caries
ID# 2837
Date of submission: 04/16/2015spacer
E-mail lawm@livemail.uthscsa.edu
Author Mimi Law
Co-author(s) e-mail
Faculty mentor/Co-author Georgiana S. Gross, MPH
Faculty mentor/Co-author e-mail GROSSG@uthscsa.edu
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