In children aged 6-9 years, it is very critical when it comes to trauma in the front teeth especially, to know outcome of their problem at later date.
Reason cited is that front teeth erupt at age of 6-7 years or 7-8 years, but root completion of teeth happens after 3 years, that is 9-10 years.
In this window period of 6-10 years if any trauma occurs to pulp of tooth or any trauma occurring without breakage of pulp, it can be managed by a 2 stage process called Apexification or Apexogenesis.
First followed by root canal treatment and later is an intermediate process usually done with help of MTA at the level where fracture has happened.
The advantage of MTA is that it aids in helping roots to grow so that the root canal can be carried out effectively.