Every specialist be it in any field of dentistry is skilled to do to routine RCT. If your Pedodontist is confident about re-rct you should trust her and get the treatment.
Next Steps
After Re-RCT get a crown made on that teeth.
Health Tips
Doing Re-RCT weakens the tooth to some extent and may involve multiple appointments, avoid chewing anything hard on the tooth in quesiton until your treatment is completed.