Is a Root Canal Safe? The Real Risks, the Myths and What Protects You

The Short Answer

Yes. For most people, a root canal is a routine and safe treatment. It is not free of risk, but serious problems are uncommon, and leaving an infected tooth untreated is usually the bigger danger.

The Real Risks

• Soreness for a few days: very common, and normally eases on its own. Occasionally a tooth flares up with more pain or swelling, and needs a quick review. Read what pain is normal after a root canal.
• Infection that stays or comes back: this can happen if a canal is missed or bacteria leak back in later. Such a tooth can often be treated again. See failed root canals and retreatment.
• A broken instrument: the fine instruments used inside canals can occasionally break. It can often be removed or worked around.
• A small hole in the root (perforation): uncommon. Small ones can often be repaired, especially when treated straight away.
• A cracked tooth: a treated back tooth can break if it isn't protected. This is why most back teeth need a crown.
• Numbness that lasts longer than expected: rare, and more of a concern with lower back teeth, which sit near a nerve.

What the Research Says About Success

A large review of studies found that 86% to 93% of root canal treated teeth were still in place 2 to 10 years later (Ng and colleagues, International Endodontic Journal, 2010). Your own chances depend on how badly the tooth is damaged, how well it is sealed, and how you look after it.

The Myths

"Root canals cause illness in the rest of the body"

This idea goes back to a theory from the early 1900s, based on studies that had serious flaws. Modern research has not shown that root canal treatment causes illness elsewhere in the body. An untreated tooth infection, on the other hand, can spread.

"A root canal is very painful"

The tooth is numbed first, so most people feel pressure rather than pain. The severe pain people remember usually comes from the infected tooth before treatment.

"Pulling the tooth is safer"

Extraction is also a procedure with its own risks, and the gap can lead to shifting teeth and further treatment. If a tooth can be saved, keeping it is usually better. Compare both in root canal vs extraction.

"Antibiotics can fix it instead"

Antibiotics can't reach the bacteria living inside the root canals. They can help with a spreading infection when prescribed, but they don't remove the cause.

What Happens If You Don't Treat the Tooth

An infected tooth doesn't heal on its own, even if the pain stops for a while. The infection can damage the bone around the root and cause an abscess. Rarely, it can spread into the face and neck, which is a medical emergency.

What Keeps Treatment Safe

• A clear X-ray and diagnosis before anything starts
• Sterilised instruments and careful infection control
• Keeping the tooth clean and dry during treatment, away from saliva
• Accurate measuring of each canal, with an electronic apex locator and X-rays
• Working under magnification, so fine canals are easier to find and clean
• A good seal afterwards, with a proper filling or crown placed on time

What You Can Do

• Tell your dentist about every health condition and medicine, and if you are pregnant
• Don't stop any medicine on your own; ask first
• Avoid chewing hard food on the tooth until it is fully restored
• Don't delay the final filling or crown
• Brush, floss and keep your follow-up visits

Bottom Line

A root canal is a safe, well-studied way to keep your own tooth. The risks are real but mostly uncommon, and many can be managed. An infection left untreated is usually the greater risk.

If you are unsure, ask to see your X-ray and go through the options. Read how root canal treatment works, or call or WhatsApp +91 97370 97666. I see patients across Ahmedabad by appointment, in English, Hindi or Gujarati.

Dr. Bhavya Soni
BDS | MDS, Conservative Dentist & Endodontist