Pre op: tooth #19 with a failing root canal
Please note the (underwhelming) root canal filling. Patient, 11 years old, was quite symptomatic.
A young tooth is difficult to clean and obturate well because of the size of the canal system.
Post op: completed retreatment
An alloy was placed in the access to ensure against any bacterial products.
3 year post operative x-ray
Periapical lesion has healed and tooth is asymptomatic.
I recommend full coverage at 18 years of age to allow for structural changes in her dentition. Prior to 18 it is probably best that a posterior tooth have some sort of temporary crown. I always recommend this to the patient and parents.