cortices. 1  1a (1) : the outer or superficial part of an organ or bodily structure (such as the kidney, adrenal gland, or cerebellum or a bone); especially : cerebral cortex (2) : the proteinaceous usually pigmented layer of a hair below the cuticleb : the outer part of some organisms (such as paramecia)
If a toenail has completely fallen off, it can take up to 18 months for it to grow back. A toenail can take longer to grow back if the nail bed has permanent damage. In some cases, old nails do not completely fall off, and they act as a protective...
Depending on the severity of the infection, you can start to see improvements in your nail in a few weeks. For complete regrowth, however, it could take anywhere from 6 months to a year. This also depends on whether or not you are consistent with treating the fungus, and how well you keep the nail trimmed. No one can say for sure how long it will take a toenail to regrow, but for most people, this is the case.