<unk>  is histologically identified on microscopic views of tooth<unk> .  Because<unk>  is located around<unk>  rods, the areas of<unk>  enhances the "keyhole" appearance of<unk>  rods by acting as its border.  The location where the two areas of<unk>  meet is known as the rod sheath.
All tooth<unk> , including<unk>  and<unk>  rods, is made by ameloblasts.  However,<unk>  is formed slightly sooner than<unk>  rods.<unk>  has the same composition as<unk>  rods.  A distinction is made between the two because they differ in the direction of their crystalline patterns.
Interrod enamel
Agar plate
Demegestone
Mees' lines
Nodule of vermis
Clavicle
Articular processes
Half and half nails