Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Nail Structure and Growth

No description
by

Rhonda Lewis

on 2 January 2015

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Nail Structure and Growth

CHAPTER 9
NAIL STRUCTURE AND GROWTH
THE NAIL
Technical term for the nail is
"ONYX"
NAIL ANATOMY
BASIC PARTS
Free Edge
- is the part that of the nail plate that
extends over the tip of the finger or toe
NAIL PLATE
MATRIX
area where nail plate cells are formed
COMPOSITION OF THE NAIL
KERATIN
15 TO 25% WATER
same fibrous
protein found in
skin and hair
water affects nails flexibility
water content various depending on humidity and surrounding environment
HEALTHY APPEARANCE
shiny and firm but flexible
smooth, unspotted, with no hollows or wavy ridges
whitish and translucent in appearance
pinkish color of nail bed showing through
NAIL PLATE
FREE EDGE
NAIL BED
MATRIX
LUNA
CUTICLE
EPONYCHIUM
HYPONICHIUM
Nail Bed
FREE EDGE AND NAIL BED
contains nerves, lymph, and blood vessels to nourish matrix cells
extends from under the nail fold at the base of the nail plate
LUNULA
living skin at the base of the natural nail plate and covers the matrix area
HYPONYCHIUM
slightly thickened layer of skin that lies
between the free edge and finger tip
SPECIALIZED LIGAMENTS
connects bone and hold organ in place
CUTICLE
dead, colorless tissue attached to natural nail plate
sticky and difficult to remove from a small nail plate
its job is to seal the natural nail plate to the living skin
prevents foreign objects and micro-organisms from entry; helps prevent infection
EPONYCHIUM
often confused with the cuticle; they are not the same
the cuticle is the dead tissue adhered to the nail plate
eponychium is living tissue that grows up to the nail plate
the cuticle comes from underneath the area and detaches from the eponychium and strongley attaches to the new growth of the nail plate
pulls free to form a seal between the natural nail plate and the eponychium
forms a protective barrier from micro-organisms from invading and infecting the nail bed
attaches matrix bed and nail bed to bone
NAIL FOLDS
folds of skin of normal skin that surround the nail plate
folds form grooves of slits the side walls
folds are also known as lateral nail fold and is the overlapping the side of nail
porous and allows water to pass through nail plate
depends on the enviroment or humidity
An appendage of the skin, it is the horny, translucent, protective plate that protects the tips of fingers and toes
It is part of the
"INTEGUMENTARY SYSTEM"
lower the water content the more rigid the nail becomes
coating the plate with an oil based nail conditioner or
nail polish improves the flexibility by reducing water loss
also prevent excessive water absorption
hardened keratin plate and sits on and covers the nail bed
most visible and functioning part of the nail unit
porous; allows water to pass through it easier than normal skin of equal thickness
as it grows the nail plate slowly slides across the nail bed

the nail plate is formed by "MATRIX CELLS"
the job of the "MATRIX CELLS" is to create nail plate cells

Nail plate may look like one
piece but in reality it is constructed
of about 100 layers of nail cells
Portion of the livinig skin that supports the nail plate
as it grows toward the free edge.
Richly supplied with blood vessels, the nail bed has a pinkish appearance from the lunula to the area just beforethe free edge of the nail.
Contains many nerves, and is attached to the nail plate by a thin layer of tissue called "Bed of Epithelium"
Bed of Epithelium helps guide the nail plate
along the nail bed as it grows.
visible part of the matrix
extends from underneath the living skin
called "Lunula"
whitish in color
half moon shape
color is caused by reflection of light of the
surface of the matrix
every nail has a lunula but some are short and remain hidden
Nail Growth
Growth Process
grows forward, starting at the matrix and extending over the fingertip
grows in a variety of shapes
average growth is 1/10 per month
growth is faster in summer then winter
children's nails grow faster than those of adults
middle fingernail grows fastest
thumbnail grows slowest
toenails grow more slowly than do fingernails
Nail Malformation
toe nails are harder and thicker because the matrix is bigger
If disease, injury or infection occurs in the matrix, the shape or thickness of the nail plate can change.
These conditions are generally the only reason that a person sheds a nail
We do not shed our nails the same way we do our hair
Often after disease, injury or infection that has affected the nail growth, the natural nail will return to its healthy growth as long as the matrix is healthy and undamaged
Replacement normally takes about 4 to 6 months for fingernail and 9 to 12 months for a toenail
Know Your Nails

Remember that as a licensed cosmetologist, you are allowed to work only on healthy nails and skin with visible signs of disease or infection
Types of Nail Growth
Full transcript