What is the chevron shape between the root and blade of a megalodon tooth?

The chevron shape between the root and blade of a megalodon tooth is known as the "crown" or "crown-root junction." This distinctive feature aids in the tooth's strength and durability, allowing it to withstand the forces exerted during the biting and tearing of prey. The chevron shape also provides an effective surface for attachment to the jawbone, enhancing the overall functionality of the tooth in capturing and processing food.