The short version
- Saving the tooth preserves the root and the surrounding bone, and avoids teeth drifting.
- Extraction is better when the tooth is fractured below the gum or too little structure remains.
- A treated tooth usually needs a crown — skipping it is the commonest reason root canals fail.
When a tooth is badly infected, there are two honest options: treat it and keep it, or remove it and replace it. Neither is automatically correct, and being told there is only one choice is usually a sign to ask more questions.
The case for saving the tooth
Nothing works quite like your own tooth. Root canal treatment removes the infected pulp, disinfects and seals the canals, and leaves the root in place — which matters more than most people realise, because the root preserves the surrounding bone and stops the neighbouring teeth from drifting.
Done under magnification, success rates are high. And the experience is not what its reputation suggests: it is performed under local anaesthesia and is generally no more uncomfortable than a filling. The pain people associate with root canals is the infection beforehand — the treatment is what relieves it.
When extraction is genuinely the better decision
If the tooth is fractured vertically or broken below the gum line, it cannot be sealed reliably and will fail whatever is done. If too little sound tooth structure remains to hold a crown, there is nothing to build on. If severe gum disease has already destroyed the supporting bone and the tooth is mobile, treating the nerve does not address the actual problem.
In those situations, heroic treatment simply postpones the inevitable at your expense. A straightforward extraction and a planned replacement is the more honest path.
The part people skip, and regret
A root-treated tooth becomes more brittle, because the procedure removes tissue from the middle of it. Back teeth in particular need a crown afterwards to hold them together under chewing load.
Skipping the crown to save money is the commonest reason a technically successful root canal fails. The tooth splits a year or two later and then genuinely cannot be saved. If the crown is unaffordable right now, say so — that is a legitimate reason to discuss extraction instead, rather than doing half the treatment and hoping.
Counting the real cost
Comparing a root canal plus crown against a simple extraction is not a fair comparison, because the gap does not stay a gap. Replacing the tooth properly with an implant and crown generally costs more than saving it would have, and takes months longer.
The fair comparison is: root canal plus crown, versus extraction plus whatever replacement you intend. Sometimes saving the tooth is both the better and the cheaper option; sometimes it is not.
Questions worth asking
Ask what the actual prognosis is for this specific tooth — not root canals in general. Ask what the alternative involves, start to finish, including the replacement. Ask what happens if you do nothing for six months. And ask to see the X-ray; a good clinician will be glad to show you exactly what they are looking at.
An untreated infected tooth does not stay stable. It progresses to an abscess, and occasionally to a spreading facial infection that becomes a genuine emergency. Choosing between the two options is reasonable. Choosing neither is not.
Worried about any of this?
An article cannot examine your mouth. Call and describe the problem — we will tell you honestly whether you need to be seen urgently or whether it can wait.
