Effect of acidic food and drinks on surface hardness of enamel, dentine, and tooth-coloured filling materials

J Dent. 2006 Mar;34(3):214-20. doi: 10.1016/j.jdent.2005.06.003. Epub 2005 Aug 8.


Objectives: The purpose of this study was to determine the effect of acidic food and drinks (Cola soft drink, drinking yogurt, orange juice, sports drink, Tom-yum soup) on surface hardness of various substrates (enamel, dentine, universal composite, microfilled composite, conventional glass ionomer, resin-modified glass ionomer, polyacid-modified resin composite).

Methods: Specimens (n = 10) were alternately immersed, 5 s each, in food or drinks and in artificial saliva for 10 cycles. Baseline and post-immersion Vickers hardness were compared using paired t-test. The difference in hardness between the groups was analysed with one-way ANOVA followed by a least significant different (LSD) test.

Results: Cola soft drink significantly reduced surface hardness of enamel, dentine, microfilled composite, and resin modified glass ionomer (p < 0.05). Orange juice and sports drink significantly reduced surface hardness of enamel (p < 0.05). Drinking yogurt and Tom-yum soup did not reduce surface hardness of any substrate.

Conclusion: This in vitro study confirms the erosive potential of certain acidic food and drinks that public should be aware of.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acrylic Resins / chemistry
  • Analysis of Variance
  • Beverages / adverse effects*
  • Carbonated Beverages / adverse effects
  • Composite Resins / chemistry
  • Dental Enamel / chemistry
  • Dental Enamel / drug effects*
  • Dentin / chemistry
  • Dentin / drug effects*
  • Hardness / drug effects
  • Hardness Tests
  • Humans
  • Polyurethanes / chemistry
  • Silicon Dioxide / chemistry
  • Surface Properties / drug effects
  • Tooth Erosion / chemically induced
  • Yogurt / adverse effects


  • Acrylic Resins
  • Composite Dental Resin
  • Composite Resins
  • Polyurethanes
  • glass ionomer
  • Silicon Dioxide