Why do people with bad teeth generally have a good temper? Is there a scientific basis?

According to the theory of traditional Chinese medicine, "teeth are outside the bone" means that teeth are exposed bones, and "kidney dominates the bone" means that teeth and bones come from the same source and both grow and develop by nourishing kidney essence, so the growth and loss of teeth are closely related to the rise and fall of kidney essence. When the kidney essence is sufficient, the teeth are nourished, showing that the teeth are firm and tidy.

Traditional Chinese medicine pays attention to the overall concept, and the related theories such as "anger hurts the liver" and "essence and blood are homologous" can be seen that the two will have a certain impact.