Interrod enamel is

histologically Histology, also known as microscopic anatomy or microanatomy, is the branch of biology which studies the microscopic anatomy of biological tissues. Histology is the microscopic counterpart to gross anatomy, which looks at larger structures vis ...

identified on microscopic views of

tooth enamel Tooth enamel is one of the four major tissues that make up the tooth in humans and many other animals, including some species of fish. It makes up the normally visible part of the tooth, covering the crown. The other major tissues are dentin, ...

. Because interrod enamel is located around

enamel rod An enamel prism, or enamel rod, is the basic unit of tooth enamel. Measuring 3-6 μm in diameter, enamel prism are tightly packed hydroxyapatite crystals structures. The hydroxyapatite crystals are hexagonal in shape, providing rigidity to the pri ...

s, the areas of interrod enamel enhances the "keyhole" appearance of enamel rods by acting as its border. The location where the two areas of enamel meet is known as the

rod sheath Rod sheath is an area identified in histologic sections of a tooth. It is found where enamel rods, the functional unit of enamel, meet interrod enamel. The crystals of both types of enamel meet at sharp angles and form the appearance of a space ...

. All tooth enamel, including interrod enamel and enamel rods, is made by

ameloblast Ameloblasts are cells present only during tooth development that deposit tooth enamel, which is the hard outermost layer of the tooth forming the surface of the crown. Structure Each ameloblast is a columnar cell approximately 4 micrometers in ...

s. However, interrod enamel is formed slightly sooner than enamel rods. Interrod enamel has the same composition as enamel rods. A distinction is made between the two because they differ in the direction of their crystalline patterns.

References

*Cate, A.R. Ten. Oral Histology: development, structure, and function. 5th ed. 1998. . Parts of tooth it:smalto interprismatico {{dentistry-stub