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How is tooth decay related to $\text{pH}$ ? How can it be prevented ?
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• Tooth decay starts when pH of mouth is lower than 5.5. (1 Mark)
• It can be prevented by cleaning the mouth after eating. / By using toothpastes as they are basic in nature. (1 Mark)
(any other preventive method)
• It can be prevented by cleaning the mouth after eating. / By using toothpastes as they are basic in nature. (1 Mark)
(any other preventive method)