The texture of a tooth after the nerve has been removed is generally brittle. High inlay restorations can reduce the risk of fracture, but fracture may still occur when the affected tooth is subjected to excessive biting force, as described below.
A tooth that has had its nerve removed has lost its supply of nutrients from the pulp and will be more brittle than a healthy tooth. A high onlay restoration covers the jaw surface of the affected tooth, and the force on the tooth wall is compressive stress, which greatly reduces the risk of fracture and effectively protects the remaining portion of the tooth tissue.
However, the affected tooth cannot withstand excessive occlusal forces, such as biting hard objects, night grinding, trauma, etc., which may still result in the occurrence of tooth fracture.
If symptoms of a fractured tooth occur, it is recommended to visit a hospital and receive professional treatment as soon as possible.