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Nail Structure and Growth 2

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by

Rhonda Lewis

on 4 January 2013

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Transcript of Nail Structure and Growth 2

Folds of normal skin that surround the nail plate
These folds form the nail grooves, which are slits or furrows on the side walls
Also known as lateral nail fold NAIL FOLD Tough band of tissue that connects bone to hold organ in place
Attaches nail bed and matrix bed to underlying bone SPECIALIZED LIGAMENTS Slightly, thickened layer of skin that lies between the finger tip and the free edge of the natural nail
Form protective barrier from foreign objects and micro-organisms from entering HYPONYCHIUM Living skin at the base of natural nail
Covers the matrix
Often confused with the cuticle but they are two separate things
Cuticle is dead tissue that sticks to nail plate and comes from the underside area where it detaches from the eponychium
Eponychium is living tissue
Cosmetologist are prohibited from cutting the eponychium; even if the client requests it!! EPONYCHIUM Visible part of the matrix that extends from underneath the living skin
Whitish; half moon shape at base of the nail
Every nail has one; some are just shorter than others and remain hidden under the eponychium LUNULA Where the nail is formed
Composed of matrix cells that produce the nail plate
Contains nerves, lymph, and blood vessels to nourish nails
Extends from under nail fold at base of nail plate
Visible portion called lunula or half moon
Growth affected by poor health, nail disorders or diseases, or injury to nail matrix MATRIX NAIL BED Portion of living tissue that supports the nail plate as it grows towards the free edge

Supplied with many blood vessels and nerves
Nail has pinkish appearance

Attached by a thin layer of tissue called the “bed of epithilium” which helps guide the nail plate along the nail bed as it grows NAIL BED Hardened keratin plate that sits on and covers the nail bed
Most visible and functional
Relatively porous
Allows water to pass through
Rests on the nail bed
Constructed of 100 layers of nail cells
Free edge is the part of the nail plate that extends over the tip of the finger or toe NAIL PLATE NAIL CROSS-SECTION The natural nail unit is composed of several major parts, including the nail plate, nail bed, matrix, nail cuticle, eponychium, hyponychium, specialized ligaments, and nail folds NAIL ANATOMY Nail plates are made of dead cells and do not require oxygen

Nail beds are living tissue so they need oxygen, vitamins and minerals

Nail beds do not have sweat glands, so the nail cannot perspire but the skin around the nail does perspire DID YOU KNOW Water can pass through more easily than normal skin.

Water content of the nail is related to the humidity of the surrounding environment.

The nail has 15 to 25% water content.

Water content affects the nail’s flexibility.

The less water content, the more brittle the nail,

Ointment-based conditioner reduces the loss of water in the nail. NAIL POROSITY Firm but flexible
Surface is shiny, smooth, unspotted with no wavy ridges, pits or splits
Whitish and translucent in appearance, with pinkish color of the nail bed showing through
In some races the nail bed may have more yellow tones HEALTHY NAIL
An appendage of the skin, this horny, translucent plate protects the tips of fingers and toes.

Onyx is the technical term for the nail.

The nail is composed mainly of keratin.

A healthy nail should be whitish and translucent in appearance, with the pinkish color of the nail bed below showing through

Part of the “INTEGUMENTARY SYSTEM” THE NAIL What is technical term for the natural nail?
What protein is in the natural nail?
Describe the appearance of a healthy nail
Name the major parts of the natural nail unit
What is difference between nail plate and nail bed?
What part of natural nail contains the blood vessels, nerves ect.?
What is difference between cuticle and eponychium? REVIEW Dead colorless tissue
Attaches to the nail plate
Incredibly sticky and difficult to remove from the nail plate
Seals the space between the natural nail plate and living skin
Prevents entry from micro-organisms, foreign objects and infection prevention CUTICLE CHAPTER 9 NAIL STRUCTURE AND GROWTH Typing on a keyboard or lightly touching natural nails on a piano keys stimulates the nails and make the grow A persons nutrition, exercise and a person’s general health can affect the health of not only skin but the nails also. NAIL GROWTH A persons nutrition, exercise and a person’s general health can affect the health of not only skin but the nails also. NAIL GROWTH Grows in a variety of shapes
Depends on the shape of the matrix
Length, width and curvature of the matrix determines the width, thickness and curvature of the nail plate
Ex. Longer matrix produces a thicker nail plate and a highly curved matrix produces a highly curved free edge

No product or procedure can make the nail plate grow thicker. Thicker nail plate needs a bigger matrix (toe nail)

Toe nails are thicker because of the bigger matrix NAIL GROWTH Grows in a variety of shapes
Depends on the shape of the matrix
Length, width and curvature of the matrix determines the width, thickness and curvature of the nail plate
Ex. Longer matrix produces a thicker nail plate and a highly curved matrix produces a highly curved free edge

No product or procedure can make the nail plate grow thicker. Thicker nail plate needs a bigger matrix (toe nail)

Toe nails are thicker because of the bigger matrix NAIL GROWTH NAIL GROWTH NAIL SHAPES A persons nutrition, exercise and a person’s general health can affect the health of not only skin but the nails also. NAIL GROWTH Grows in a variety of shapes
Depends on the shape of the matrix
Length, width and curvature of the matrix determines the width, thickness and curvature of the nail plate
Ex. Longer matrix produces a thicker nail plate and a highly curved matrix produces a highly curved free edge

No product or procedure can make the nail plate grow thicker. Thicker nail plate needs a bigger matrix (toe nail)

Toe nails are thicker because of the bigger matrix NAIL GROWTH NAIL SHAPES Average rate of nail growth is 1/10 of an inch per month
Many factors will affect this growth
Ex. Age
Compared with nails of an average adult, children’s nails grow much faster but are thinner and elderly people’s nails grow much slower
Seasons also affect nail grow. How?
Hormonal changes from pregnancy help the nail grow much faster and increase rapidly in the last trimester and decreases after pregnancy. Why?
Nail position will also affect the growth rate of the nail.
Fastest on the middle finger and slower on the thumb
Toenails grow much more slower NAIL GROWTH Disease, injury, or infection that occurs to matrix, the shape or thickness of the nail plate can change
Main reason generally why people shed a nail
Nails do not shed automatically or periodically in the way healthy hair does
Replacement of finger nails normally takes around 4 to 6 months
Replacement of toenails takes about 9 months to a year NAIL MALFORMATION What are the 3 factors that can affect the growth of the natural nail? REVIEW
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