Root Canal Treatment or Extraction: How to Decide

When a tooth is badly infected, there are usually two paths: treat the inside of the tooth and keep it, or remove it and decide what — if anything — replaces it. Neither answer is right for every tooth. This guide sets out the questions that matter so you can make the decision with your dentist and endodontist rather than on your own.

Start with the prognosis of the tooth

The first question is whether the tooth can be saved predictably. An endodontist will assess:

• How much sound tooth structure is left. A tooth needs enough solid structure above the gum to support a crown after treatment.
• Whether there is a crack. Cracks that run down the root cannot be repaired; cracks confined to the crown often can.
• The state of the gum and bone around the tooth. Advanced gum disease can undermine an otherwise treatable tooth.
• The complexity of the canals. Curved, narrow or previously treated canals are more challenging but are exactly what specialist treatment is designed for.

A tooth with a good prognosis is almost always worth keeping. A tooth with a hopeless prognosis should be removed — and a good endodontist will tell you which is which.

What extraction really involves

Removing the tooth ends the infection, but it creates a gap. Over the following months the bone that supported the root shrinks, neighbouring teeth can drift, and the tooth in the opposite jaw may over-erupt. Replacing the tooth with an implant, bridge or denture restores function but involves further treatment, time and cost — and each option has its own maintenance needs.

Choosing not to replace a missing back tooth is sometimes reasonable, but it shifts chewing load onto the remaining teeth.

Comparing the options

The figures in any comparison depend on the individual case. Published studies consistently show high survival rates for both well-executed root canal treatment and dental implants; the deciding factors are usually the condition of the specific tooth and the patient's priorities.

The cost question

Root canal treatment followed by a crown is usually less expensive than extraction followed by an implant and crown, and the treatment is completed much sooner. Extraction alone is cheaper in the short term, but the long-term cost of a gap — or of replacing the tooth later — is easy to underestimate.

Common myths

"A root-treated tooth is a dead tooth." The pulp is removed, but the tooth remains attached to the bone by its ligament, has feeling through the surrounding tissues, and functions normally.

"Root canal treatment causes illness elsewhere." This idea comes from discredited research from the early twentieth century. There is no scientific evidence linking root canal treatment to systemic disease. An untreated infected tooth, by contrast, is a genuine source of infection.

"The tooth will just need to come out later anyway." Some teeth do eventually fail, usually because they were not crowned or because a new problem developed. Well-treated, well-restored teeth commonly last for decades.

Making the decision

Ask for a clear assessment of the tooth's prognosis, the expected outcome of each option, and the total cost and time involved. If the tooth can be saved predictably, keeping it is usually the right call. If it cannot, a clear plan for replacement is the priority. Either way, an accurate diagnosis is the place to start — and that is exactly what a consultation is for.