Patient discussion about fluorosis

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Q. How do you differentiate between fluorosis and caries?

Both appear as white spots on the teeth, so clinically how do you differentiate between them? I know it has something to do with their appearance while wet and dry, but I am not sure what? please help me I can't find this in any book.
A1Only mild fluorosis is seen as white stop lesion on the tooth. It usually comes with brown spots. Look for them. Another method is trying to stick a dental explorer into it (not the Microsoft one- it’ll only be a portal for viruses..) and because caries is demineralized area it will feel kind of sticky. But I wouldn’t do that…it can harm the teeth. Another way is by an x ray. Fluorosis- you will see it as a whiter spot. Caries- a more translucent spot.
A2Fluorosis is something that happens when the tooth forms. It can not happen after the tooth erupts, so it is something that was always on the tooth. Cavities form after the tooth erupts and would be a white spot that forms where brackets from braces or at gum line or anywhere plaque could build up.
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