Root Canal or Extraction: How the Decision Is Actually Made

When a tooth is badly decayed or infected, there are two real options: clean out the inside and keep it, or take it out. As an endodontist, Dr. Pragati Singh's default is to try to save it — but that is a starting position, not an absolute, and some teeth are genuinely not worth saving.

When a root canal is the better option

The tooth is a good candidate if enough sound structure remains above the gum to hold a restoration, the root is not fractured, the surrounding bone support is reasonable, and the tooth has a useful job to do in the bite. In those circumstances the success rate is high — large studies put survival of properly treated and crowned teeth at around 85 to 95 per cent at ten years.

When extraction is the better option

• A vertical root fracture. This is the clearest indication. A split root cannot be sealed and will keep reinfecting.
• Too little tooth left. If decay extends well below the gum, there may be nothing for a crown to grip.
• Severe bone loss from advanced gum disease, leaving the tooth mobile regardless of what is done inside it.
• A failed re-treatment where the infection has persisted through repeated attempts.
• A tooth with no functional role, such as an unopposed wisdom tooth.

The cost comparison people get wrong

On the day, extraction wins easily. But a gap is not a stable end state. The teeth either side drift into it, the opposing tooth over-erupts into the space, the bite changes over years, and cleaning becomes harder around tilted teeth. The bone in the gap also resorbs once the root is gone.

So the honest comparison is not root canal plus crown versus extraction. It is root canal plus crown versus extraction plus replacement — an implant and crown, a bridge, or a partial denture. An implant typically costs several times what saving the tooth would have. A bridge means cutting down two healthy neighbouring teeth to support it.

Leaving the gap unrestored is a legitimate choice in some positions, particularly the very back of the mouth. It is rarely a good one in a visible or load-bearing position.

Why the natural tooth still wins

Implants are excellent, and for a genuinely unsaveable tooth they are the best replacement available. But a natural tooth has a periodontal ligament — a shock-absorbing attachment with nerve fibres that sense pressure and let you feel what you are biting. An implant is fused directly to bone with none of that. It also cannot get decay, but it can get peri-implantitis, which is harder to treat than gum disease around a natural tooth.

Getting a straight answer

Ask directly: what is the realistic prognosis for this tooth if we try to save it, what would replacement cost if it fails, and what would you do if it were your tooth? Any dentist should answer all three without hesitation. If a tooth is borderline, it is often reasonable to attempt the root canal, on the understanding that extraction remains available if it does not settle.

Frequently asked questions

Is it better to save a tooth or get an implant?

Save it, where the tooth is restorable. A natural tooth retains its shock-absorbing ligament and pressure sensation, and costs considerably less than extraction plus an implant and crown.

How long does a root canal treated tooth last?

With a proper crown, large studies put ten-year survival at roughly 85 to 95 per cent. Failure is most often linked to the tooth cracking, which is why the crown matters so much on back teeth.

When is a tooth beyond saving?

Most clearly with a vertical root fracture, or when so little structure remains above the gum that a crown has nothing to grip. Severe bone loss from gum disease is another common reason.

Is extraction cheaper than root canal treatment?

On the day, yes. Over the following years it usually is not, once you include replacing the tooth. Leaving a gap lets neighbouring teeth drift and the opposing tooth over-erupt.

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