A root-treated molar without cuspal coverage tends to split, and the reason is the access cavity — not the myth that a dead tooth becomes brittle over time.
A root-treated back tooth left without cuspal coverage is far more likely to split, and when it splits vertically it is usually not restorable. The reason is structural rather than mystical. Removing the pulp does not make a tooth brittle in any meaningful sense; what weakens it is everything that had to be removed to get there — the decay, the old filling, and the access cavity cut through the roof of the tooth, which destroys the arch holding the cusps together under load.
An incisor or canine with a small access cavity, intact walls and no discolouration does not automatically need a crown, and we will restore it with a bonded composite instead. Front teeth take shearing rather than crushing forces and keep far more of their original structure after treatment. Any clinic that crowns every root-treated tooth by default is removing tooth substance it did not need to remove, and that particular decision cannot be undone later.
Have the definitive restoration done within weeks, not months. A temporary filling leaks within a few weeks and saliva carrying bacteria travels back down the sealed canal; this coronal leakage is one of the most common reasons a technically perfect root canal fails a year or two later. If you are travelling home before the crown can be made, tell us, and we will place a properly sealed core rather than a soft temporary dressing.
Root canal treatment is €120 and a monolithic zirconium crown is €180 per tooth, so a molar taken from painful to permanently restored is around €300 in total. Both stages fit inside a single five to seven day visit because the design and milling happen in the same building. Compare that with the same sequence priced privately in Western Europe, where the root canal alone frequently exceeds the combined figure here.
On a molar we advise against it. A cusp-covering onlay is an acceptable middle option in some cases, but a plain filling in a tooth that has lost its structural arch is the setup for a fracture that ends in extraction.
A root-treated front tooth can darken slowly over years. If it does, internal bleaching or a veneer solves it, which is a further reason not to crown a healthy-looking incisor prematurely just because it has been treated.