Yellow stains on the roots of the teeth need to be ultrasonic scaling, but also need to pay attention to oral hygiene, diligent brushing and rinsing. Yellow stains on the roots of the teeth are usually caused by the accumulation of food debris, and at the same time, if you drink tea and smoke or drink coffee for a long time, it may also lead to pigmentation on the teeth, the symptoms of yellow stains on the roots of the teeth, you can usually seek medical treatment in time to carry out ultrasonic scaling, through the ultrasonic vibration can be removed from the teeth of the pigmentation and tartar. Normally, when brushing teeth, you must extend the brushing time and brush your teeth for many times to remove the residual substances on your teeth, and you also need to protect your teeth to avoid tooth damage. Regular dental checkups are needed to avoid plaque buildup.