title: The erosive effect of herbal tea on dental enamel.
abstract: OBJECTIVE
  The aim of this study was to determine whether conventional black tea and a herbal tea were capable of eroding dental enamel. A further aim was to investigate whether herbal tea of the type tested eroded dental hard tissues to a greater or lesser extent than conventional black tea.
  
  
  METHODS
  Three groups of 21 teeth were exposed to a conventional black tea Typhoo (Group A), a herbal tea Twinings Blackcurrant, Ginsing and Vanilla (Group B) and water, which acted as a control (Group C). Sequential profilometric tracings of the specimens were taken, superimposed and the degree of enamel loss calculated as the area of disparity between the tracings before and after exposure.
  
  
  RESULTS
  Conventional black tea and herbal tea, of the type tested, both resulted in tooth surface loss. Tooth surface loss, which resulted from exposure to herbal tea (mean 0.05mm(2), s.d. 0.02), however, was significantly greater (P=0.00) than that which resulted from exposure to conventional black tea (mean 0.01mm(2), s.d. 0.00) and water (mean 0.00mm(2), s.d. 0.00).
  
  
  CONCLUSIONS
  It was concluded that herbal tea and conventional black tea of the type tested result in erosion of dental enamel. The erosive effect of the herbal tea of the type tested was five times more severe than that of the conventional black tea tested. The cumulative effects of regular consumption of herbal tea of the type tested are likely, therefore, to be of clinical significance.
authors.affiliation: Unit of Operative Dentistry and Endodontology, University Dental Hospital of Manchester, Higher Cambridge Street, M15 6FH, Manchester, UK. paul.brunton@man.ac.uk
authors.forename: P A
authors.initials: PA
authors.lastname: Brunton
authors.forename: A
authors.initials: A
authors.lastname: Hussain
mesh_terms: D000704:Analysis of Variance; D001547:Benzaldehydes / Q000009:adverse effects; D001628:Beverages / Q000009:adverse effects* / Q000145:classification; D003743:Dental Enamel / Q000648:ultrastructure; D005421:Flavoring Agents / Q000009:adverse effects; D006801:Humans; D005894:Panax; D019685:Rosales; D013223:Statistics as Topic; D013662:Tea / Q000009:adverse effects; D014077:Tooth Erosion / Q000139:chemically induced* / Q000473:pathology; D014867:Water
chemical_list: D001547:Benzaldehydes; D005421:Flavoring Agents; D013662:Tea; D014867:Water; C100058:vanillin