ORAL HEALTH EVIDENCE-BASED PRACTICE PROGRAM
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Title Most Herbal and Citrus Fruit Teas Have a Low Erosive Potential
Clinical Question In healthy patients, do herbal and citrus fruit teas cause enamel erosion to the same degree as other popular beverages?
Clinical Bottom Line For patients that drink herbal and citrus fruit teas, the risk of enamel erosion from these drinks is significantly lower than other popular beverages. Studies indicate that many teas have high pH levels and the lowest buffering capacity values compared to many other beverages.
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) 21733310Lussi/2012600 caries free human premolars exposed to beverages, food, and medications.Laboratory study
Key resultsThe extracted teeth exposed to many various herbal teas were found to have no significant effect on enamel surface hardness after 2 and 4 minutes of exposure (P<0.01) compared to the soft drinks, sports drinks, and energy drinks in the study. The exception was rose hip tea that had a high pH, high buffering capacity and caused a significant decrease in surface hardness (P=.006).
#2) 23207851Amoras/201275 bovine enamel specimens exposed to various beverages.Laboratory study
Key resultsThe specimens exposed to black tea caused a small decrease in enamel micro-hardness (mean of -71.18) compared to those exposed to the soft drinks which had the significantly highest value of all beverages (mean of -129.86). Compared to milks and the control group, which was mineral water, black tea was found to have a slightly higher effect in decreasing the surface hardness.
Evidence Search ("Dental Enamel"[Mesh] AND "Food"[Mesh]) AND "Tooth Erosion"[Mesh]
Comments on
The Evidence
The first study was an in vitro study of extracted human premolars exposed to various substances measuring the pH and surface hardness of enamel. This study provided strong evidence with a large sample size. Although it is an in vitro study, the teeth were immersed in saliva for 3 hours to form a pellicle similar to what occurs in the mouth. The second study reviewed the enamel micro-hardness of extracted bovine teeth specimens exposed to various beverages. Each specimen was treated the same at the start then randomly assigned to five types of beverages. These studies show that the link between teas and enamel erosion is weak.
Applicability The erosive potential of herbal teas is significantly less than other beverages. Drinking these teas is unlikely to cause erosion and affect the oral health of patients.
Specialty/Discipline (Public Health) (General Dentistry)
Keywords nutrition, enamel erosion, tea
ID# 2863
Date of submission: 03/27/2015spacer
E-mail zaidan@livemail.uthscsa.edu
Author Byan Zaidan
Co-author(s)
Co-author(s) e-mail
Faculty mentor/Co-author Georgiana S. Gross, MPH
Faculty mentor/Co-author e-mail GROSSG@uthscsa.edu
Basic Science Rationale
(Mechanisms that may account for and/or explain the clinical question, i.e. is the answer to the clinical question consistent with basic biological, physical and/or behavioral science principles, laws and research?)
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Comments on the CAT
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