There is definite radiolucency associated with 11 and 22 ,it looks like a radicular cyst irt 22 but irt 11 it is massive and needs débridement and excisional biopsy ,it could be cystic but histopathology will tell definitive diagnosis,it doesn’t look like a surgical defect as you mentioned 16 years have lapsed since it was first treated,in this long time bone healing should have taken place .
Re root canal is not required if tooth first root canal is good enough which is not very clear from X-rays provided.
Apicectomy can be done at the time of surgery.
Prognosis of 11 will depend upon the nature of the associated radiolucency ,if anything aggressive,tooth will need to be extracted.
Next Steps
Visit an Oral & Maxillofacial Surgeon for detailed treatment planning
Health Tips
Always better to see doctor/ dentist in person even for second opinion
Hope that helps !!