Comment on the statement "pH change as a cause tooth decay".give one method to prevent tooth decay?
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If the ph value is less than 5.5 our teetch cause decay. Our tooth contains calcium phospate. If we eat acid foods they are in our teeth and it causes bacteria so it causes tooth decay
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when bacteria acts on left over food ,acids are produced which when decreases on a ph of5.5 tooth stars decaying or dental carries to overcome use of a base eg tooth paste should be used
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