Black marks look like stains trapped in the grooves (pits and fissures) of the tooth, it's not necessarily cavity & Surface staining from tea/coffee or food pigments.

Based on the photo and your description, these marks are natural grooves (fissures) with mild staining, which is very common in back teeth. Since you have no pain, no sensitivity, and no food getting stuck, this does not suggest a cavity at present. Cavities usually cause symptoms or show progression over time. This is not a cause for concern. Maintain good oral hygiene, brush twice daily with fluoride toothpaste, and limit sugary foods. A routine dental check-up and professional cleaning can easily manage this, and if the grooves are deep, a preventive sealant may be advised.

Get it rechecked for a decay before the black lines can be underlying decay Early evaluation will stop the decay Either a filling or a sealant will help

Initial cavity Before it get deeper pls get pit and fissure sealent done

This is classic pits and fissure carries. You should go for pit and fissure sealants treatment. If this is left untreated, then it may grow into occlusion carries and further deep, so better get it treated in initial phase only.

Hello These are pit and fissures caries(cavity). Better to get it restored with cement filling

Hello Looks like the caries is due to the deep pits They can be sealed

It looks like an incipient caries..

They may be stains or even starting of caries . Just get check up done . Caries are best if treated early.

They look like extrinsic stains in the picture - surface staining from tea /coffee or any coloured foods . If you are a person who goes for routine Dental check-ups and whenever you go next and the Dentist notices any catch in those grooves then those are early signs of Dental decay and you need to get filling done .

From the photo and your description, these look like natural fissure lines and superficial staining on the chewing surface of molars. These grooves are normally present in teeth and sometimes collect pigments from food or drinks, which can appear as black or brown lines. Since you have no pain, no sensitivity, and food is not getting stuck, it is less suggestive of an active cavity. Many people have similar fissure markings which remain stable for years. However, if you want to be completely sure, a dentist can check clinically and may suggest polishing or a preventive sealant if the grooves are deep. You should get it reviewed if you notice pain, sensitivity, or if the marks start increasing in size. Maintain proper brushing focusing on back teeth grooves and regular dental check-ups every 6 months.

Hello, From the image and symptoms, this looks like early (incipient) tooth decay in the grooves. That’s why there’s no pain or sensitivity yet. At this stage, it can often be managed with good oral hygiene, fluoride application, and monitoring. If the grooves are deep, a preventive sealant or small filling may be advised to stop it from progressing. Do get it checked clinically to decide the best preventive step. Hope this helps.

Appears to be extrinsic staining of teeth caused due to food . Visit Dentist for cleaning of teeth.