Though the teeth has become loose and after a year or so the permanent tooth will erupt ... however u got to watch out whether the injury has damaged the permanent tooth that is present inside and the gums. If it has it may delay the eruption or lead to curving of the roots of the teeth
Next Steps
Please consult with a specialist pedodontist for the best opinion
Health Tips
Though the tooth is loose, it can be retain like a space maintainer .. else the other teeth would migrate to the empty space and later on causing alignment /irregular/crowding teeth problems.