Today another patient friend said to me during the consultation: I should have pulled out the root of the tooth if I had known it would be so hard. This friend’s tooth developed into a stump due to untreated caries. I believe many people will have similar thoughts. In fact, this is a wrong viewpoint, due to which may cause irreparable end —- pulling out the teeth that could have been kept. Human beings have only two tooth rows, and permanent teeth will stay with you until they fall out after replacing the baby teeth, and permanent teeth will not regenerate after they fall out. Even if the permanent tooth is so bad that only the root is left, it will still be very useful. We know that the root is surrounded by periodontal membrane tissue, which has many nerve receptors, which can effectively sense and control the size and direction of the biting force, perceive the nature of things through chewing, and enjoy the joy of chewing; at the same time, due to the existence of the root, the alveolar bone can continuously receive physiological stimulation, minimizing the resorption of the alveolar bone, and retaining a good foundation for future denture repair; in addition In addition, the presence of the root allows the chewing pressure to be transmitted to the bone through the periodontium, and this good support can effectively improve the chewing efficiency of food; of course, if we have missing teeth in the mouth, if we retain the root and make full use of it, the restoration effect of our dentures may be a world of difference from the dentures with the root removed. However, not all roots can be preserved, so you need an experienced and conscientious doctor to examine and judge your case, and if necessary, you need a perfect root canal treatment or periodontal surgery.