Myth #1
“Root canals are extremely painful.”
Fact. Modern root canals are virtually painless. The procedure relieves pain caused by infection, and 89% of patients describe it as comparable to a routine filling (American Association of Endodontists). The pain you remember from older root canal stories was the infection, not the treatment.
Myth #2
“Root canals cause cancer or other systemic disease.”
Fact. This myth traces to discredited research from the 1910–1930s by Dr. Weston Price and has been repeatedly debunked. There is no peer-reviewed evidence linking modern root canal therapy to cancer or systemic illness. The American Dental Association and AAE have published extensive responses.
Myth #3
“Pulling the tooth is cheaper than a root canal.”
Fact. Up front, yes — extraction is cheaper. But replacing an extracted tooth with an implant + crown ($4,000–$6,000) costs significantly more than a root canal + crown ($1,500–$2,800). And skipping replacement leads to bone loss and tooth shifting that creates further problems down the road.
Myth #4
“Root canals always fail eventually.”
Fact. Modern microscope-guided root canals have a 90–95% success rate at 10 years (AAE 2024). Many treated teeth last a lifetime. The cases that fail are typically older treatments without microscope or CBCT, or teeth with crowns that allowed bacterial leakage.
Myth #5
“You don't need a crown after a root canal.”
Fact. For molars and most premolars, you do. The crown protects the structurally weakened tooth and prevents fracture. Skipping the crown is the single biggest reason root-canal-treated teeth eventually fail. Front teeth sometimes do well with just a permanent filling — your dentist will advise.
Myth #6
“Root canals take multiple visits.”
Fact. Most root canals are completed in a single appointment of 60–90 minutes. Complex molars or retreatments occasionally require a second visit. Your endodontist will tell you up front.
Myth #7
“Pain after a root canal means it failed.”
Fact. Mild soreness for 24–72 hours after a root canal is normal — the tissue around the root tip heals like any other wound. Severe or persistent pain beyond that warrants a callback, but a successful procedure can absolutely have some post-op soreness.
Related: Signs you need a root canal · Root canal vs extraction · Smoking after a root canal