Comparison of in vitro erosion potentials between beverages available in the United Kingdom and the United States
Received 2 September 2009; received in revised form 23 November 2009; accepted 28 November 2009. published online 04 December 2009.
Abstract
Objective
Our objective was to compare the physiochemical properties and erosion potentials between beverages available in the UK and the US.
Methods
The physiochemical properties (pH, titratable acidity and fluoride concentration) and erosion potential on enamel surfaces of beverages available in the UK were compared to similar beverages from the US. Enamel windows were exposed to beverages for 25h. Teeth were sectioned through the windows, and lesion depths were defined as the average distance between the original tooth structure and the base of demineralization.
Results
The pH was lower in UK apple juice, orange juice, Diet Pepsi® and Sprite Zero® (p<0.05), and higher in UK orange soda and diet orange soda than in similar US beverages (p<0.05). Titratable acidities were higher in UK apple juice, orange juice, orange soda, diet orange soda and Sprite® (p<0.01), and lower in UK Sunny D® than in the US counterpart (p<0.001). Fluoride concentrations were lower in UK apple juice, orange juice, Coke®, and Diet Coke®, Sprite® and Sprite Zero® (p<0.001), and higher in UK orange soda, diet orange soda, Pepsi® and Diet Pepsi® than in their US counterparts (p<0.001). Lesion depths were higher in UK apple juice, orange juice, Diet Coke®, Sprite® and Sprite Zero® than in their US counterparts (p<0.05). Lesion depths were associated with pH (p=0.010) and country of origin (p=0.002).
Conclusions
Under similar laboratory conditions, the physiochemical properties and erosion potentials on enamel surfaces differed between some, but not all, beverages available in the UK and the US.
aCollege of Dentistry, University of Iowa, Dental Science Building, Iowa City, IA 52242-1010, United States
bDepartment of Preventive and Community Dentistry, College of Dentistry, University of Iowa, N-335 Dental Science Building, Iowa City, IA 52242-1010, United States
cInstitute for Aging and Health, School of Dental Sciences; Newcastle University upon Tyne NE2 4BW, United Kingdom
dDepartment of Preventive and Community Dentistry, N-431 Dental Science Building, College of Dentistry, Iowa City, IA, 52242-1010, United States
eDows Institute for Dental Research, N-413 Dental Science Building, College of Dentistry, Iowa City, IA 52242-1010, United States
ABSTRACT