Bad fall, hope he didnt mess teeth up..

My son was running around and ge had a pretty bad fall, i took him to the dentist and they said he had a tear in his gum she called it frenectomy which doesnt usually happen until about 12 years old, hes only 16 months old and im worried, she said sometimes when they hit the primary baby teeth they turn grey or purple and discolor from blood flow.. anyone know if this is common? Have u had that happen? How do u fix it? How hard so you have to hit fir that to happen.. i would hate for him to have discolored teeth until he looses them... i feel so bad.. not sure what i can do

here is a puc of his tooth, most of bleeding has calmed down now