I have a question about my teeth. I found a small, stone or teeth like structure on the left side of my teeth at the end without any pain, redness, or swelling. There's also a black line on one tooth that doesn't appear to be a cavity and doesn't hurt or is sensitive. Can you help me understand these issues, I have attached the pictures.
The stone-like thing in the pictures you sent looks like a small tooth deposit. The black line could be stained or cracked. Tooth deposits can form from leftover plaque. Stains might come from food or drink. It is good you have no pain, red, or swell - that is a nice sign. To fix this, make sure to brush and floss a lot. Also, see your dentist for a check and clean. They can take care of these things for you.