When you associate these two dreams, you are very worried about the health of yourself and your family. If your family did have a disease before, you can pay proper attention to it. If not, don't worry too much. In fact, these two dreams also have a good side: your mother dreamed of killing you, which may mean that you have grown up in their minds and your past has vanished. Death represents the past. Losing your teeth also means being an adult, so you have to make a difference. 9 stands for the complicated situation around us, but it's all over. 1 stands for a new beginning. Hands represent the way to deal with problems, and washing hands represents changing the original way to deal with problems. So these two dreams can be understood as you are trying to change your way of dealing with problems, gradually maturing, taking on more responsibilities at home, and your parents' views on you have changed.
The above analysis is for reference only. Adjust it according to your own situation. Don't be superstitious about the predictive function of dreams.