Don't know why you're freaking out.
To clarify my entire family are dentists - going back to my Great Grandmother and now my sister.
If you don't feel any pain the root isn't exposed to open air yet so the tooth is just fine - if you've never had a cavity then your track record would indicate it's likely a chipped tooth and not a cavity (they don't just appear overnight).
When is the last time you saw your dentist prior to noticing this? As I said cavity's don't just appear overnight. Believe it or not you can chip teeth on somthing as simple as a plastic straw drinking a soda.
How strong your teeth are is a genetics thing, dependant on the acidity of your saliva amoung other things. Whether you like it or not you may just be pre-disposed to having cavity's with age.
I'd venture to say you either grind your teeth in your sleep or just chipped it on somthing. If it were serious you'd know it (I haven't had any cavity's myself) exposed roots are extremly painful. If it's not sensitive to cold drinks or when you brush your teeth it's nothing to worry about.
A little bit of drilling and some cement will make it look like new
To clarify my entire family are dentists - going back to my Great Grandmother and now my sister.
If you don't feel any pain the root isn't exposed to open air yet so the tooth is just fine - if you've never had a cavity then your track record would indicate it's likely a chipped tooth and not a cavity (they don't just appear overnight).
When is the last time you saw your dentist prior to noticing this? As I said cavity's don't just appear overnight. Believe it or not you can chip teeth on somthing as simple as a plastic straw drinking a soda.
How strong your teeth are is a genetics thing, dependant on the acidity of your saliva amoung other things. Whether you like it or not you may just be pre-disposed to having cavity's with age.
I'd venture to say you either grind your teeth in your sleep or just chipped it on somthing. If it were serious you'd know it (I haven't had any cavity's myself) exposed roots are extremly painful. If it's not sensitive to cold drinks or when you brush your teeth it's nothing to worry about.
A little bit of drilling and some cement will make it look like new