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

Wongkhantee, S.; Patanapiradej, V.; Maneenut, C.; Tantbirojn, D.

doi:10.1016/j.jdent.2005.06.003

« Previous Next »Journal of Dentistry
Volume 34, Issue 3 , Pages 214-220, March 2006

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

S. Wongkhantee
- Department of Operative Dentistry, Khon Kaen University, Khon Kaen, Thailand
- Department of Operative Dentistry, Chulalongkorn University, Bangkok, Thailand
V. Patanapiradej
- Department of Operative Dentistry, Chulalongkorn University, Bangkok, Thailand
C. Maneenut
- Department of Operative Dentistry, Chulalongkorn University, Bangkok, Thailand
D. Tantbirojn
- Department of Operative Dentistry, Chulalongkorn University, Bangkok, Thailand
- Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota, 16-212 Moos Tower, 515 Delaware St SE, Minneapolis, MN 55455, USA
- Corresponding author. Address: Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota, 16-212 Moos Tower, 515 Delaware St SE, Minneapolis, MN 55455, USA. Tel.: +1 612 625 0950; fax: +1 612 626 1484.

Received 12 July 2004; received in revised form 4 May 2005; accepted 6 June 2005.

Summary

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, 5s 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.