The objective in doing Root canal on baby teeth are to preserve them till the time they fall off. The rct differs from that for a adult as the tooth will fall away in a few months to some years. The child's cooperation is paramount in fulfilling the objective. Depending on the age of the child and cooperation results are very predictable and it's a good idea to maintain the tooth till it's ready to fall away with the eruption of the permanent one. Alternatively a serial extraction could also be considered to make sure the permanent one erupts in its place .Timing however is what matters. Please consult with a dentist for a clinical Evaluation and detailed discussion and attention . TC
Root canal is required when the decay has spread to the pulp chamber ..The soft core of the tooth inside.
It should be performed after clinical evaluation and x ray if needed.
In very young children. .It may require general anesthesia or sedation in a hospital environment.
Please get her evaluated with a dentist for diagnosis and detailed treatment plan.