Nail is produced by the normal nail bed: a controversy resolved

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Abstract
Nail thickness and mass (dry weight/unit surface area) of 21 toenails, removed from 19 patients after accidental injury, were measured over the mid point of the lunula at the nail plate immediately distal to the lunula and at the distal end of the nail bed. Nail thickness increased from 43% of the final thickness over the mid-point of the lunula to 81% at its distal margin, the remaining increase in thickness being formed by the nail bed. The changes in nail mass were comparable. We conclude that ventral nail produced by the nail bed comprises about one-fifth of the terminal nail thickness and mass.

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