What is the yellow substance on the inner walls of the teeth?

    Under normal circumstances, yellowing of the inner walls of teeth may be caused by aging, pigmentation, poor oral hygiene, dental plaque, tartar, etc., and the appropriate treatment method can be selected according to the specific situation. Detailed analysis is as follows:

1. Aging

    As age increases, the tooth enamel gradually wears away, allowing the color of the dentin to gradually show through. Dentin is usually light yellow, thus making the teeth appear yellow. It is recommended to choose toothpaste containing fluoride and anti-wear ingredients, as fluoride can strengthen the hardness of the enamel and reduce wear.

2. Pigmentation

    Long-term consumption of foods or beverages containing pigments, such as coffee, tea, red wine, soy sauce, chocolate, etc., or long-term smoking may cause pigments and components in tobacco to easily adhere to the surface of teeth, leading to yellowing of the inner walls of teeth. It is recommended to reduce the consumption of staining foods and beverages, quit smoking promptly, and avoid worsening pigmentation.

3. Poor Oral Hygiene

    Brushing for too short a time or incorrect brushing technique can prevent effective removal of food debris and plaque from the tooth surfaces and interdental spaces, gradually forming tartar. Tartar appears yellow or brown and adheres to the inner walls of teeth, causing discoloration. It is recommended to brush teeth regularly, and use dental floss daily to clean interdental spaces, removing food debris and plaque.

4. Dental Plaque

    Bacteria in the mouth, food debris, and components in saliva interact and adhere to the tooth surfaces, forming dental plaque. If oral hygiene is not maintained timely, plaque can easily accumulate, especially on the inner walls of teeth. It is recommended to use the correct brushing technique, such as the Bass method, brushing teeth at least twice daily for no less than two minutes each time.

5. Tartar

    If plaque remains on the tooth surfaces for a long time, it gradually absorbs minerals from saliva and hardens into tartar after some time. Tartar is typically yellow or brown and firmly adheres to tooth surfaces, especially near the gum line on the inner walls of teeth. It is recommended to follow medical advice and improve the condition through ultrasonic scaling, which can effectively remove tartar in a timely manner.

    If abnormalities occur in the teeth or mouth, it is recommended to seek timely medical attention at a hospital and follow medical advice for treatment.