How does smoking rotten the teeth?

Smoking contributes to dental decay and tooth rot primarily by reducing blood flow to the gums, which weakens the supporting structures of the teeth. It also leads to dry mouth, decreasing saliva production that is essential for neutralizing acids and washing away food particles and bacteria. Additionally, the tar and chemicals in cigarettes can stain teeth and promote the buildup of plaque, further increasing the risk of cavities and gum disease. Overall, these factors combine to accelerate tooth decay and deterioration.