Can an old filling eventually lead to root canal treatment?

Yes, indirectly. A large filling can leave less natural tooth structure, while a worn or damaged edge may allow decay to develop. However, age alone does not mean the filling needs replacement or that a root canal is necessary. The dentist assesses the restoration, pulp, and remaining tooth structure before recommending treatment.

Why does tooth pain disappear and then return later?

Pain can ease temporarily even when the underlying problem remains. If the pulp loses vitality after severe damage, sensitivity may fade before inflammation or infection develops around the root. Other dental conditions can also cause intermittent symptoms. Arrange an assessment if pain returns, lingers after temperature changes, or occurs with swelling.

Does every cracked tooth need root canal therapy?

No. A superficial crack may only need monitoring or a restoration, while a deeper crack that affects the pulp may require root canal treatment. If the tooth is split or the crack extends deeply into the root, it may not be restorable. Examination helps determine the likely outcome.

Is a crown always needed after root canal treatment?

Not always, but back teeth often need a crown because chewing places substantial force on them, particularly when a large filling or crack has weakened the structure. The recommendation depends on the tooth’s location, remaining healthy tissue, and extent of damage. Follow the dentist’s restoration and review advice to protect the tooth.