YES, my middle child did this. She was 4 when it happened. She fell on a ladder at gymnastics class. her teeth were bleeding as well. I didn't think much of it, except for that she was bleeding and upset, so we left the gym and went home. I let her rest (sometimes she would over react to getting hurt) I was able to give a bag of ice. I had to go to a baby shower. When I came back, she wouldn't close her mouth, and the bag of water (started as ice) was still in her mouth, she wouldn't remove it. My husband said that she fell esleep she would wake right up when she would close her mouth. So we went to the ER. By that time she was more reasonable. They gave her kiddy vicodin and would not do an xray because it wouldn't get the right picture anyway, and we would have to make an appointment with our dentist. Her teeth were loose as well, but they said to feed her soft foods. We took her to the dentist that monday and the took an xray and determinded though her baby teeth were damaged and already starting to turn grey, that her upper jaw was not broken and her adult teeth were fine. The dentist suggested we keep an eye on the teeth and gums and if they started to swell and blister it means there was an infection caused by the dead teeth and that they would be removed.
She still has her teeth and they are still discolored but they are solid, no movement and she is fine a year later...
Super scary. Especially will someone so young!