l noticed a cavity in my tooth that has thin dark lines on the top of the tooth. There are no holes or dark dots. It looks more as if some of the visible nerves (?) on my tooth turned dark. Is this a beginning stage? Is it any easier to fix than other types of cavities? l plan to go to the dentist soon but l just wanted to know beforehand. Thank you.

really dark in the center and brownish in color in surrounding areas of cavity, your roots are dying sorry, it will be painful if not filled with haste.

It might just be a stain in the pits and fissures of the tooth.
You're dentist will know the difference when he probes it.
Do not worry about it just yet.

its yellow and dark

our tooth has pits and fissures on the occulusal surface. The initial cavities start from their. If you donot have any hole then it looks like as if it is a very initial stage. It can be filled very easily. For more information on dental caries you can visit the following very informative website
http://identalhub.com/ArticleSubCategories.aspx?ArticleCategoryId=7&Name=Dental%20Caries
you can also use their free dental consultation facility from dentist