Why a root-treated back tooth breaks
Two things happen during a root canal. The pulp is removed, and access to the canals is cut down through the biting surface, which is structurally the worst place to remove material from a molar.
A molar works like an arch. The cusps are held together by the ridge of tooth across the top, and cutting through that ridge lets the cusps flex apart under bite force. Repeated flexing produces a crack, and the crack propagates down. When it reaches below the bone level, the tooth cannot be saved.
The tooth also no longer hurts, because the nerve is gone. So the warning system that would normally tell you something is wrong has been removed along with the pulp.
The timing matters
The crown should follow the root canal within weeks, not eventually. A tooth left in a temporary filling is vulnerable in two ways: it can fracture, and the temporary material leaks, letting bacteria back into the canals that were just disinfected. Reinfection means the root canal has to be redone, which is more difficult and less predictable than doing it the first time.
The commonest version of this failure is not a decision to skip the crown. It is a plan to have it done later that quietly never happens, usually because the pain stopped and the tooth felt fine.
When a filling is genuinely enough
Front teeth. An incisor or canine takes much lower bite force and the access cavity is cut through the back surface rather than the biting edge, so the arch structure is largely intact. Where the tooth is otherwise sound, a bonded filling is often appropriate and a crown would be over-treatment.
The judgement is about how much tooth remains, not simply which tooth it is. A front tooth already heavily restored, or one that is discoloured and needs its appearance corrected anyway, may still be better crowned.
The arithmetic of skipping it
A crown in Lucknow costs ₹3,000 to ₹25,000 depending on material. A root canal costs ₹3,000 to ₹12,000.
If the tooth fractures below the gum, you lose both. The extraction costs ₹500 to ₹5,000, and replacing the tooth costs ₹12,000 to ₹50,000 for a bridge or ₹25,000 to ₹60,000 for an implant. So a decision to save ₹8,000 on a crown routinely costs ₹40,000 or more within a few years, and it costs you the tooth.
This is why a root canal quote that does not mention the crown is an incomplete quote rather than a cheaper one.
Common questions
What happens if I do not get a crown after a root canal?
On a back tooth, it is significantly more likely to fracture, often within a few years and often below the gum line, at which point it usually cannot be saved. The temporary filling also leaks over time and can reinfect the canals, meaning the root canal has to be redone.
How long can I wait before getting the crown?
Weeks, not months. A tooth in a temporary filling is vulnerable to both fracture and reinfection. If cost is the reason for delay, say so, because a core build-up and a properly sealed provisional restoration is a far safer holding position than a temporary dressing.
How much does a crown after a root canal cost in Lucknow?
₹3,000 to ₹25,000 depending on material, with zirconia at ₹8,000 to ₹18,000 being the usual choice for a back tooth. A post and core, which a heavily broken-down root-treated tooth usually needs first, adds ₹1,500 to ₹5,000.
Do front teeth need a crown after a root canal?
Often not. Front teeth take much lower bite force and the access cavity is cut through the back surface rather than the biting edge, so the tooth's structure is largely preserved. A bonded filling is frequently appropriate. A front tooth that is already heavily restored or badly discoloured may still be better crowned.
Medically reviewed
Reviewed by Dr. Dhanya Saxena, BDS, MHA, FMC, FAOI, oro-dental surgeon and aesthetic physician at Redefine Dental and Facial Aesthetic, Indira Nagar, Lucknow. Dental Council registration 20935. Last reviewed 30 August 2026.
This page is general information, not a diagnosis or a quotation. Prices are prevailing Lucknow market ranges. Your own treatment and cost are determined after an examination.