Bed Epithelium

This is a thin layer of specialised epithelial tissue that sits on the nail bed and under the nail plate.

At the proximal end it is connected to the nail matrix. At the distal end it forms part of the hyponychium seal.

The onychodermal band is where it squeezes past this seal. It is also involved in the condition: hyperkeratosis which is a reaction to several aggressive factors.