Anatomy and Physiology of Nail Growth

Nails is the largest skin supplement. It grows continuously in a non-cyclic way throughout life; growth is not dependent on hormone. Nail Growth through all our lives, but the fastest in the first four years of life and the fastest grows between 4-30 years.

The toe of the middle finger of the dominant hand grows to a maximum of about 0.1 mm / day, while the toe nail grows only 0.03-0.05 mm / day. The size and shape of the nails vary characteristicly from the finger to the toe and toe to toe, for which the size and shape of the terminal phalanx bone is responsible. The distal phalanx provides bone support for the nail bed and is broken in 50% of the finger tips. The nail bed is maintained between the nail plate and the distal phalanx. Nail nails grow faster than toenails.

The nail apparatus consists of both epithelial and connective tissue components. The nail is fixed to the bone by a vascularized dermis and two strong ligaments

Nail Growth
Growth is the fastest in people who eat long fingers and fingernails. The plate is produced by the nail matrix.
Normal growth is about 1.9 to 4.4 mm per month (0.3 mm per day). It may take two months for the plate to come out of the proximal nail curl
A full nail plate needs 6 months to re-grow
The first plate is always irregular, so clinical results can only be assessed at one year follow-up.
Nail plate growth stops for 3 weeks
Proximal portion of plate thickens
Growth accelerates for 50 days (plate thins)
Then the growth slows for 30 days.
A transverse line on the nail plate: Beau’s line
Width is related to trauma duration
Gone away in time
Grows faster in the summer in the winter months.
Nail plate
The nail plate is the real nail and is made of translucent keratin.
The pinkish appearance of the nail comes from the blood vessels underneath.
While the matrix epithelium is responsible for the production of the nail plate, it mediates the intact binding of the nail bed epithelium.
Produced by Germinal matrix
Keratin structure, partially transparent and both longitudinal and transverse curved
Three different layers, 0.5 mm thickness, 20% water
Our nails consist of keratinised cells.
These cells form the nail plate which is the structure that covers the nail bed and the underlying matrix.
The nail plate is slightly curled, allowing the nails to be buried in fingers. This is more pronounced in the nail nails than in the nail tips to provide additional power to the foot.
I Eponychi
Eponychium is more known as a cuticle.
The cuticle was placed between the skin of the finger and the nail plate.
It connects these structures and provides a waterproof barrier.
Hyponium is the area between the nail plate and the fingertip.
It is the connection between the free edge of the nail and the skin of the fingertip.
It also provides a waterproof barrier.
Hyponium is a special structure covering the lower skin cavity and allowing the nail plate to be physiologically separated from the nail bed.
Hyponium is located where the skin of the nail tip of the sterile matrix of the nail bed meets.
Hyponium is the area of ​​high immune activity where large amounts of immune cells, such as lymphocytes, are present.
As a result, infections under the nail are relatively uncommon unless the nails continue to wet in the solutions that damage or destroy the hyponychium, unless they allow bacteria and fungi to penetrate into the nail.
I Paronychia
Paronychium is also the skin on the edges of the nail plate, also known as the paronychial edge.
Include all soft tissues under the nail plate
The germinal matrix,
Nail bed,
Soft tissues plaque (paronyum) proximal and lateral nail wall (crimp) and cuticle
Paronium contributes to the stability and adhesion of the nail to the fingertip and is located where the skin of the finger comes into contact with the place where the nail is curled inside the finger.
Currently there is no specific function directly associated with paronychium.
Nail production
The nail consists of a substance called the onyin, which is produced by the death of germinal cells, which are cells transformed into various cells.
The nails are formed by pressing these cells upwards.
The nail perionychiumGerminal matrix is ​​produced in three areas of the Sterile matrix.
Nail matrix.

Germinal matrix
Most of the nail is produced by the germinal matrix (about 90% by volume).
This matrix extends from the base of the nail to the lunula.
The cells in the matrix multiply by a process where the cells are flattened and pressed forward and upward while holding their cores (the central body within a cell).
This retains the white color of the spring from the spring to the nail.

Categories:   Nail Growth