Root canal treatment is usually preferable when a badly damaged or infected tooth can be predictably restored and supported for the long term. It removes infection from inside the tooth while preserving the natural root.
Extraction may be the better option when the tooth is split below the gum, has too little healthy structure remaining, has severe bone or gum support loss, or has already undergone unsuccessful treatment with a poor chance of recovery.
The cheapest immediate option is not always the least expensive overall. A private extraction may cost approximately £100 to £600, while root canal treatment and a crown could cost £800 to £2,500 or more. However, replacing an extracted tooth with an implant may bring the total to £2,000 to £4,000+.
The decision should therefore compare the tooth’s prognosis, treatment burden, future maintenance and complete cost—not simply the price of root canal treatment versus removal.
Seek urgent dental care for severe toothache, facial swelling, fever, a bad taste, difficulty opening your mouth or rapidly worsening symptoms. Call 999 or attend A&E if swelling affects breathing, swallowing, speaking or the eye.
This guide provides general information. Only a dentist who has examined the tooth and appropriate X-rays can determine whether it can reasonably be saved.
What is the main difference between root canal treatment and extraction?
Root canal treatment aims to keep the natural tooth. The dentist removes infected or inflamed pulp from the centre and root canals, cleans and disinfects the space, then fills and seals it.
Extraction removes the entire tooth from its socket. It eliminates the infected or damaged tooth but leaves a space unless the tooth is replaced.
| Consideration | Root canal treatment | Extraction |
|---|---|---|
| Main aim | Preserve the natural tooth | Remove the tooth completely |
| Treatment time | Usually one or more longer appointments | Often completed during one appointment |
| Restoration | Filling, onlay or crown may be required | No restoration unless the gap is replaced |
| Initial private cost | Usually higher | Usually lower |
| Long-term cost | May require a crown or future retreatment | Can become higher if a bridge or implant is fitted |
| Effect on neighbouring teeth | Natural tooth remains in position | Teeth may move if the gap is not managed |
Neither option is universally better. Saving a tooth with a hopeless prognosis can lead to repeated pain and expense, while removing a restorable tooth can create unnecessary functional and replacement problems.
When can a badly damaged tooth be saved?
A tooth may be suitable for root canal treatment when:
- infection or inflammation is confined to the pulp and tissues around the root;
- the root is not split vertically;
- enough healthy tooth remains above or close to the gum;
- decay can be removed and the remaining structure restored;
- the tooth has adequate bone and gum support;
- the canals can be located, cleaned and sealed;
- the final tooth can contribute usefully to chewing and the bite;
- the patient can maintain suitable oral hygiene.
The dentist must consider both endodontic restorability and structural restorability. Successfully disinfecting the canals is not useful if there is too little tooth left to support a filling or crown.
Factors affecting prognosis include:
- how far decay extends below the gum;
- the thickness of the remaining walls;
- whether a crack enters the root;
- the shape and accessibility of the canals;
- previous root canal treatment;
- the size of any infection around the root;
- gum disease and bone loss;
- clenching or grinding;
- smoking and general health;
- whether a protective restoration can be placed promptly.
A badly broken tooth may occasionally need additional procedures, such as gum surgery or orthodontic extrusion, to expose enough sound tooth for restoration. These add cost and treatment time.
Our guide to broken teeth and treatment options explains how the location and extent of damage affect the decision.
When is extraction likely to be the better option?
Extraction may be more predictable when:
- the tooth has a vertical root fracture;
- a crack extends deeply below the gum or through the root;
- decay extends so far below the gum that a reliable seal cannot be created;
- very little healthy tooth remains;
- severe gum disease has destroyed most of the supporting bone;
- the tooth is extremely mobile;
- root canals are inaccessible or damaged beyond predictable treatment;
- previous treatment has failed and retreatment or surgery has a poor prognosis;
- the tooth is causing recurrent infection but has little functional value;
- keeping it would compromise a broader treatment plan.
Wisdom teeth are more likely to be extracted than treated with root canal therapy because they can be difficult to access and may contribute little to function. The same reasoning should not automatically be applied to a first molar, canine or front tooth.
Extraction may also be chosen when the tooth could technically be saved but the treatment is exceptionally complex, expensive or burdensome. The dentist should explain the likely success, uncertainties and reasonable alternatives without pressuring the patient.
If a cracked tooth is suspected, read our guide to cracked-tooth symptoms and treatment. Some cracks can be protected, while others make the tooth unrestorable.
What happens during root canal treatment?
The NHS explains that root canal treatment removes infection from inside a tooth before the space is cleaned, filled and sealed to prevent reinfection.
A typical procedure involves:
- examining the tooth and taking X-rays;
- using local anaesthetic;
- isolating the tooth, commonly with a rubber dam;
- creating an opening through the biting surface;
- removing infected or inflamed pulp;
- locating, cleaning and shaping the root canals;
- disinfecting the canals;
- filling and sealing the prepared spaces;
- placing a temporary or permanent restoration;
- protecting the tooth with an onlay or crown when required.
Treatment may take one, two or more appointments. Molars generally take longer because they have several roots and a more complex canal system.
A general dentist performs many routine root treatments. Complex anatomy, blocked canals, previous treatment, broken instruments or persistent infection may require an endodontist—a dentist with advanced training focused on root canal treatment.
The NHS provides a concise description of how root canal treatment is performed. Our more detailed guide to root canal treatment and recovery covers the stages and possible complications.
What happens during a tooth extraction?
A straightforward extraction is performed after the tooth and surrounding area have been numbed. The dentist loosens the tooth and removes it from the socket.
A surgical extraction may be necessary when:
- the tooth has broken at or below gum level;
- the roots are curved or fragile;
- the tooth is impacted;
- the crown fractures during removal;
- bone must be removed to access the root;
- the tooth needs to be divided into sections.
The gum may be lifted and then closed with dissolvable stitches. A blood clot forms in the socket and protects the healing tissue.
Possible complications include:
- pain and swelling;
- bleeding;
- dry socket;
- infection;
- damage to a neighbouring tooth or restoration;
- sinus communication after removal of an upper back tooth;
- nerve injury involving certain lower teeth;
- delayed healing.
The gap remains after healing unless a bridge, denture or dental implant is fitted. Read our guide to tooth extraction, recovery and costs before comparing the complete treatment pathways.
How much do root canal treatment and extraction cost?
Private prices depend on the type of tooth, complexity, location, dentist and whether a specialist is required.
| Treatment | Possible private UK cost |
|---|---|
| Front-tooth root canal treatment | Approximately £300–£700 |
| Premolar root canal treatment | Approximately £400–£900 |
| Molar root canal treatment | Approximately £600–£1,500+ |
| Specialist retreatment | Approximately £800–£1,800+ |
| Permanent filling or core restoration | Approximately £100–£350 |
| Crown or onlay | Approximately £500–£1,200+ |
| Simple extraction | Approximately £100–£300 |
| Surgical extraction | Approximately £250–£600+ |
A molar treated privately for £900 and restored with a £750 crown creates a total cost of £1,650. If a specialist performs complex treatment, the complete cost could exceed £2,000.
An extraction costing £200 appears considerably cheaper. However, the later cost may include:
| Replacement after extraction | Possible private cost |
|---|---|
| No replacement | £0, although future effects should be considered |
| Removable partial denture | Approximately £500–£1,500+ |
| Conventional dental bridge | Approximately £1,200–£3,000+ |
| Single dental implant and crown | Approximately £2,000–£3,500+ |
| Bone grafting before an implant | Approximately £300–£1,500+ |
See our guide to private dental prices in the UK for wider treatment comparisons.
Which option is cheaper over the long term?
The answer depends on whether the extracted tooth needs replacing and how long each treatment remains successful.
| Example pathway | Illustrative total |
|---|---|
| Root canal treatment, core and crown | Approximately £1,200–£2,500+ |
| Extraction with no replacement | Approximately £100–£600 |
| Extraction followed by a denture | Approximately £600–£2,000+ |
| Extraction followed by a bridge | Approximately £1,300–£3,600+ |
| Extraction, implant and crown | Approximately £2,100–£4,100+ |
Root canal treatment may be the less expensive complete option when it preserves a strategically important tooth for many years. Extraction may cost less when the missing tooth does not need replacement, such as some wisdom teeth or teeth at the very back of the mouth.
Future maintenance also matters:
- a root-treated tooth may need a new filling or crown;
- infection can recur and require retreatment or surgery;
- a bridge may eventually need replacement;
- a denture can loosen as the mouth changes;
- an implant crown or screw may require maintenance;
- gum disease can affect both natural teeth and implants.
No treatment lasts forever. Ask about the likely prognosis over five to ten years rather than accepting a “permanent” or “lifetime” claim.
What happens if you leave a gap after extraction?
Not every missing tooth must be replaced. The decision depends on its position, chewing function, appearance, bite and the condition of the remaining teeth.
Possible effects of leaving a gap include:
- reduced chewing efficiency;
- visible cosmetic change;
- neighbouring teeth tilting or drifting;
- an opposing tooth moving into the space;
- food trapping;
- changes to the bite;
- gradual bone loss in the empty socket.
These changes do not occur to the same degree in every person. A small gap at the back of a stable mouth may cause little practical difficulty, while losing a first molar or front tooth may have a greater effect.
Possible replacements include:
Removable partial denture
This is usually the least expensive replacement. It can replace several teeth but must be removed for cleaning and may feel bulky.
Resin-bonded bridge
A replacement tooth is attached to a neighbouring tooth using a metal or ceramic wing. This can require little or no drilling but is not suitable for every gap or bite.
Conventional bridge
The neighbouring tooth or teeth are prepared to support the replacement. This may be reasonable when they already need crowns, but it removes healthy tooth structure if they are otherwise intact.
Dental implant
An implant supports a crown without relying on adjacent teeth. It requires adequate bone, surgery, healing time and ongoing cleaning.
Our guides explain dental bridges and provide a full UK single-implant cost breakdown.
Is root canal treatment more painful than extraction?
Both procedures are normally performed under local anaesthetic. You should feel pressure and movement but not sharp pain during treatment.
Root canal treatment has a reputation for being painful because patients often arrive with severe inflammation or an abscess. The treatment is intended to remove the source of that pain.
After root canal treatment:
- the tooth may feel tender when biting;
- the surrounding gum can feel sore;
- mild discomfort may last several days;
- persistent or worsening pain needs review.
After extraction:
- pain and swelling are expected for a short period;
- the socket usually feels most uncomfortable during the first few days;
- healing discomfort should gradually improve;
- sudden severe pain several days later can indicate dry socket.
Extraction creates a surgical wound and can involve more post-treatment swelling than an uncomplicated root canal. Difficult surgical removal may require several recovery days.
If dental fear is influencing the choice, tell the dentist. Pain control, longer appointments, staged care and sedation may be available. Our guide to dental anxiety and finding a supportive dentist explains the options.
How successful is root canal treatment?
Root canal treatment can preserve many infected teeth for years, but success depends on the tooth, quality of treatment and final restoration.
Reasons treatment may fail include:
- a narrow or hidden canal remaining untreated;
- bacteria remaining inside complex canal anatomy;
- a leaking filling or crown;
- new decay;
- a delayed permanent restoration;
- fracture of the weakened tooth;
- persistent infection around the root;
- poor gum and bone support.
A failed root canal does not always mean immediate extraction. Options may include:
- repeating the root canal treatment;
- referral to an endodontist;
- apical surgery to treat the root end;
- repair or replacement of the crown;
- extraction when further treatment is unlikely to succeed.
Specialist treatment can improve access to complex canals through enhanced imaging, magnification and dedicated instruments. It cannot make a deeply split or structurally unrestorable tooth predictable.
The British Endodontic Society provides resources for patients considering treatment to save a tooth. See its patients and public information.
Does a root-treated tooth always need a crown?
Not every root-treated tooth requires a crown, but badly damaged back teeth frequently need strong protection because they absorb substantial chewing forces.
A crown or onlay may be recommended when:
- a large filling has already removed much of the tooth;
- the tooth has lost one or more cusps;
- decay caused extensive structural damage;
- the tooth is a premolar or molar exposed to heavy biting forces;
- there are cracks in the remaining walls;
- the dentist needs to create a reliable long-term seal.
A front tooth with a small access opening and otherwise sound structure may sometimes be restored with a bonded filling. Colour changes can be managed separately if appearance becomes a concern.
Delaying the permanent restoration can allow the temporary filling to leak or the tooth to fracture. Ask when the crown or onlay should be fitted and avoid biting very hard foods on the tooth in the meantime.
Read our guide to dental crowns, materials and costs for more information.
Do antibiotics remove the need for root canal treatment or extraction?
Antibiotics do not remove infected tissue from inside a tooth and cannot repair severe decay or a fracture. Symptoms may temporarily improve while the underlying source remains.
Definitive treatment may involve:
- drainage of an abscess;
- root canal treatment;
- extraction;
- gum treatment when infection originated around the tooth.
Antibiotics may be prescribed when infection is spreading, the person has systemic symptoms or another clinical indication exists. They are not routinely required for every toothache.
The NHS states that a dental abscess does not disappear on its own and requires urgent dental treatment. See the NHS guidance on dental abscess symptoms and treatment.
Repeated antibiotic courses without treating the tooth can delay necessary care and contribute to antimicrobial resistance.
How should you decide between root canal treatment and extraction?
Ask the dentist to explain the decision using your X-rays and examination findings.
Useful questions include:
- Is the tooth definitely restorable?
- How much healthy structure remains?
- Is there evidence of a crack or root fracture?
- How much bone supports the tooth?
- What is the chance of keeping it for five or ten years?
- Would a general dentist or endodontist perform the treatment?
- Will I need a crown, post, onlay or gum procedure?
- What is the complete cost of saving the tooth?
- What happens if root canal treatment fails?
- Does the tooth need to be replaced if extracted?
- What would each replacement option cost?
- How soon must treatment begin?
A second opinion may be useful when:
- the tooth is being described as borderline;
- the only choices presented are extraction and an implant;
- several teeth are scheduled for removal;
- the treatment plan is particularly expensive;
- you want an endodontist to assess whether retreatment is possible;
- the explanation does not match the symptoms or X-ray.
A clinician should discuss reasonable alternatives and material risks as part of valid consent. The General Dental Council places communication and informed consent among its professional standards. See the GDC Standards for the Dental Team.
When is tooth damage or infection an emergency?
Ask for an urgent dental appointment if you have:
- severe or persistent toothache;
- a dental abscess;
- facial or jaw swelling;
- a bad taste or pus in the mouth;
- fever or feeling generally unwell;
- difficulty opening the mouth;
- a broken tooth causing severe pain;
- swelling that is increasing;
- pain that is not controlled by appropriate pain relief.
Call 999 or attend A&E if:
- swelling makes breathing, speaking or swallowing difficult;
- there is extensive swelling inside the mouth;
- the eye is swollen, painful or vision is affected;
- you are becoming severely unwell or confused.
GPs cannot provide definitive dental procedures. Contact your dentist, an urgent dental service or NHS 111 if you cannot obtain an emergency appointment.
Our guide to dental emergencies and where to seek help explains the available routes.
Frequently asked questions
Is root canal treatment better than extraction?
It is generally preferable when the tooth can be reliably treated and restored. Extraction is better when the tooth is structurally hopeless, severely unsupported or unlikely to remain useful.
Is it better to remove an infected tooth?
Not necessarily. Root canal treatment can remove infection while preserving a restorable tooth. Removal may be recommended if saving it has a poor prognosis.
What is the cheapest option?
Extraction usually has the lowest immediate cost. Root canal treatment may cost less over the complete pathway if extraction would be followed by an expensive bridge or implant.
Can a dentist tell from an X-ray whether a tooth can be saved?
An X-ray provides important information about roots, infection and bone, but restorability also requires examination. Some cracks are difficult to confirm until old fillings or decay are removed.
Can a tooth be too damaged for root canal treatment?
Yes. A split root, decay extending deeply below the gum, severe bone loss or insufficient remaining tooth structure can make extraction more predictable.
Can I ask for a second opinion before extraction?
Yes, unless delaying treatment would create an immediate clinical risk. An endodontist can assess complex teeth and whether root canal treatment or retreatment is feasible.
Does root canal treatment kill the tooth?
It removes the living pulp from inside the tooth, but the tooth remains supported by living tissues around its root and can continue to function.
How many appointments does a root canal take?
It commonly takes one or more appointments. The NHS notes that treatment often requires at least two visits, although timing depends on the tooth and technique.
Will root canal treatment stop an abscess?
It treats infection originating inside the tooth by cleaning and sealing the canals. Healing around the root takes time and follow-up may be required.
Can an abscess return after root canal treatment?
Yes. Reinfection can occur because of untreated canal anatomy, leakage, new decay or fracture. Retreatment, surgery or extraction may then be considered.
Do I need an implant after extraction?
No. Alternatives include leaving the gap, using a denture or fitting a bridge. The best option depends on the tooth’s position, bite, appearance, health and budget.
How long should I wait for an implant after extraction?
An implant can sometimes be placed immediately, but other cases need weeks or months of healing. Infection, bone volume and grafting requirements affect the timing.
What happens if I leave an infected tooth untreated?
Pain may worsen or temporarily disappear as the pulp dies, but infection can remain and spread into surrounding tissues. Seek dental care rather than waiting for symptoms to settle.
Can antibiotics cure an infected tooth?
No. They may help control spreading infection, but the source generally requires drainage, root canal treatment or extraction.
Can a root canal tooth last for life?
Some remain functional for decades, but no lifetime outcome can be guaranteed. Treatment quality, remaining structure, crown protection, oral hygiene and gum health all affect longevity.
What if I cannot afford root canal treatment?
Ask whether suitable NHS treatment is available, whether payment can be staged and whether referral options exist. Also compare the complete cost of extraction and replacement before deciding.
