ENJOY LEARNING

1. It is the shortest distance
between two persons..……

3. A smile cost nothing,
but gives much.
It enriches those who
receive, without making
poorer those who give.

4. Yet it cannot be bought,
begged, borrowed or
stolen, For it is
something that is of no
value to anyone until it
given away.

5. What a smile means..??
Regardless of culture, the smile
usually means:
 Happiness.
 Pleasure.
 Amusement.
 Sometimes it is an involuntary
expression of anxiety (known as a
grimace).

6. Why smile?
A smile:
creates happiness in the home, fosters good
will in business, and is the counter sign of
friendship.
It brings rest to the weary, cheer to the
discouraged, sunshine to the sad and it is
nature’s best antidote for trouble.

7. Did you know how you smile?
A smile is a facial expression formed by those
muscles most notably near both ends of
mouth.
The smile can also be found around the
eyes(called Duchenne smile).

8. Duchenne smile
A laughing smile with teeth showing and
mouth open.
A Duchenne smile contracts the zygomatic
muscles of the cheek and eye, forming
crow's feet. The crow's feet indicate that the
smile is genuine and that the smiler is truly
happy. It was discovered by and is named
after Guillaume Duchenne.

9. Duchenne smile
Eye muscle
In a genuine smile, the eyes' muscles are contracted in a
way which produces crow’s feet and pulls the cheeks
higher. In a fake one, the eyes' muscles are either relaxed
or simply squeezed.
Symmetry
In a genuine smile the face is generally symmetrical.
Smoothness
The onset of a fake smile is often abrupt, the moment of
maximum contraction is held too long, and the
disappearance is either abrupt or irregular.
Length
Research shows that genuine smiles generally last
between 0,5 and 4 seconds.

10. Fake smile Duchenne smile

11. Fake smile Duchenne smile

12. Smile styles
1. The Commissural Smile.
2.The Cuspid Smile .
3. The Complex Smile .
Reference:
Philips, Edward (BA, DD(,The Classification of Smile Patterns ,J Can Dent Assoc 1999; 65:252-4.

13. Smile styles
1. The Commissural Smile:
 67% of the population exhibit the
commissural smile, making it the most
common smile pattern.
 In this smile, the corners of the mouth are
first pulled up and outward, followed by the
contraction of the levators (muscles that
raise the upper lip) to show the upper
teeth.

14. Celebrities with recognizable
commissural smiles include:
Dennis Quaid, Kate Hudson,
Jennifer Aniston, Jamie Lee Curtis
and Mel Gibson.

15. Smile styles
2.The Cuspid Smile :
 31% of the population exhibit the
cuspid smile.
 The shape of the lips visualized as
a diamond exposing the cuspid
teeth, then the corners of the
mouth contract to pull the lips
upward and outward.

16. Celebrities with recognizable
cuspid smiles include: Elvis
Presley, Tiger Woods, Drew
Barrymore, Sharon Stone and Tom
Cruise.

17. Smile styles
3. The Complex Smile :
 2% of the population have a complex smile.
 The shape of the lips are often illustrated as
two parallel chevrons. The levators of the
upper lip, the levators of the corners of the
mouth, and the depressors of the lower lip
contract at the same time, displaying all the
upper and lower teeth simultaneously.

18. Celebrities with recognizable
complex smiles include: Julia
Roberts, Marilyn Monroe, Will
Smith, Oprah Winfrey and Angelina
Jolie.

19. Commissural Smile Complex Smile

20. Some lovely smiles

21. Mona Lisa
The most famous
smile.

22. Abotreka
An Egyptian smile

23. Asian girl smiles

24. Iraqi girl smiles

25. Indian girl smiles

26. Baby smiles

27. Some people are too
tired to give you a smile.
Give them one of yours.
As none needs a smile
so much as he who has
no more to give.