Can you get a filling/root canal with general anaesthetic?

Yes: There are a number of dentists and endodontists who are qualified by training or have hospital privileges that can perform your dental work under general anesthesia.

Yes: Fillings or root canals can be done with local anesthetic (novacaine) or for those patients who are fearful be done under sedation.

Comfort zone: A root canal is a common dental procedure. Sedation dentistry is used to provide a safe, comfortable relaxing and anxiety-free experience for certain people receiving any dental treatment. Depending on your degree of fear or anxiety, different levels of sedation may be required. Take care and have a comfortable experience.

You probably can,: But local anesthesia should be adequate. The more medications you take the higher the risk and required monitoring and time for them to wear off.

Yes: Yes, root canals can be done under general anesthetic but this is typically a procedure that is done awake. In my case I work with a board certified specialist in anesthesia to perform these procedures asleep

Yes: should to enough to control the area and fix the issue

Yes: Yes. Some endodontists have anesthesiologist come to the dental office.