Asked for male, 26 years old from Nagapattinam
Don't panic. It happens when any one face trauma to tooth. You have not mentioned the age of your son. Treatment depends whether it's a milk tooth or permanent tooth and what is his age. Blackening of tooth indicates that tooth nerve is dead and that tooth requires root can treatment. If that tooth is milk tooth and near to its permanent tooth eruption age it can be extracted also. If permanent tooth eruption time is more that 2 years than rct of milk tooth can be done too. Yes your son will have a normal tooth cycle. Don't worry, just visit a dentist nearby and get him treated.