Which type of dentine is more prominent below the DEJ?

Intertubular dentine is the type of dentine that is more prominent below the enamel-dentin junction (DEJ). This is because intertubular dentine forms the bulk of the dentin and is found between the dentinal tubules, contributing to the overall structural integrity and strength of the tooth. Below the DEJ, intertubular dentine provides a crucial supporting framework as it is dense and less mineralized compared to other types of dentine.

In contrast, peritubular dentine surrounds the dentinal tubules and is much more mineralized, making it a smaller volume compared to intertubular dentine. Primary dentine refers to the dentin formed during tooth development and is not specifically more prominent below the DEJ. Secondary dentine, which forms after tooth eruption and contributes to the aging process of the tooth, is also not as prominent in the area directly beneath the DEJ. Therefore, the unique structure and composition of intertubular dentine make it the predominant type in that region.