Why do primary teeth heat up more easily during polishing?

Primary teeth heat up more easily during polishing primarily because the enamel and dentin are thinner compared to those in permanent teeth. This reduced thickness leads to less thermal insulation, allowing heat generated during the polishing process to transfer more rapidly to the pulp within the tooth.

In primary teeth, the enamel is typically about one-third thinner than that of permanent teeth, and the dentin layer is also less substantial. As a result, the heat that is produced by the friction of polishing instruments and materials can more easily affect the inner structures of the tooth, particularly the pulp, which could lead to discomfort or sensitivity.

Other factors, such as the thickness of the enamel, the size of the pulp chamber, or the amount of polishing paste used, do not significantly contribute to the increased heat sensation during the polishing of primary teeth. Understanding the structural differences between primary and permanent teeth is essential for effective and safe dental hygiene practices, particularly in pediatric dentistry.