Why might a patient experience thermal sensitivity after cementing a crown?

A patient may experience thermal sensitivity after cementing a crown primarily due to microleakage. Microleakage refers to the microscopic gap that can occur between the crown margin and the tooth structure, allowing fluids, bacteria, and temperature changes to enter. This can irritate the pulp and lead to sensitivity to hot and cold stimuli.

When a crown is not sealed properly, small amounts of saliva and other irritants can infiltrate the area, potentially causing discomfort. Inadequate sealing can result from various factors, including improper adhesive techniques or insufficient curing of the cement used, which may be overlooked during the cementation process.

Understanding microleakage emphasizes the importance of quality control during crown placement, as ensuring a tight fit and proper sealing can significantly minimize postoperative sensitivity and enhance patient comfort.