What is the critical pH necessary for demineralisation of enamel?  

The buffering of erosion-causing beverages like tea is reduced among the elderly because ____.

With what other erosion-causing beverages did the researchers compare their results? 

The 14-day test simulated the effects of _____.

True or False?

Black tea had a higher pH than herbal tea.

True or False?

Excessive teeth grinding can result in severe cases of abrasion. 

What constituent of herbal tea do the researchers blame for erosion?

True or False?

Herbal tea causes significantly more erosion than black tea.

True or False?

The difference between the amount of erosion caused by black tea and the control treatment was significant.

Herbal tea would be considered _____ factor.