Ergonomics of brush

1. Brush
Owned By Sonali Dhasmana

2. SUBMITTED BY
Sonali Dhasmana
Owned By Sonali Dhasmana

3. Subject Pooja Kumari
Brush being used Pepsodent – Zig-Zag (sometimes oral-B)
Toothpaste Colgate
Total times used in a day Twice
Total time of usage 1 to 1 ½ minute(at one time)
Time of usage After waking up from slumber
Material of the brush Plastic and rubber
Owned By Sonali Dhasmana

4. Anthropometric measurements
Owned By Sonali Dhasmana

5. mm
mm
The brush
135o
mm
A Brush is basically used for cleaning
135o
the teeth.
mm
mm
Owned By Sonali Dhasmana

6. While using the brush
• Rapid to and fro motions during brushing of the front molars.
• Circular movements in the back teeth.
• Upright while brushing the inner teeth.
• Her elbow is in motion(moves with the brush).(the figure on left)
• Though sometimes we can make out imperceptible wrist
movement.
Owned By Sonali Dhasmana

7. Clutching the brush
Thumb is exactly at the
upper curve of the base
of the angled neck.
Owned By Sonali Dhasmana

8. The prints on a brush of
where she puts her
fingers.
This also shows the
intensity of the pressure
that varies from finger
to finger.
For ex. Pressure of the
thumb and the index finger is
greater than the last three
fingers.
Owned By Sonali Dhasmana

9. The places
where the
pressure is
exerted
most by her
digits
during
brushing.
Owned By Sonali Dhasmana

10. Other Details
• She likes the color
Blue and green.
• Elbow is creased at an
angle of 45o
• The inner part is at
about 35o
• The shoulder is at
right angle to the arm
while brushing.
Owned By Sonali Dhasmana

11. • Loves Zig-Zag
bristles(believes that
normal bristles will
not reach middle of
the teeth)
• Feels uneasy if does
not brush – like
missing something
important.
• Keeps her brush in an
old jug along with her
toothpaste, scrub and
face-wash.
Owned By Sonali Dhasmana

12. • She prefers the metal tongue-cleaner over the
rubber tongue-cleaner on the brush – says that it
feels highly ineffectual.
• When asked how she perceives her toothbrush –
says that it is perfect for her and is very comfortable
with it.
Owned By Sonali Dhasmana

13. The problems faced
The problems faced by
her(which I perceived) are
• Continual change of hand
positions during the process.
• The brush slips a little – brush is
thinner than what she should be
using. So it feels a little
insubstantial in hand – when
pointed out to her is a little • The bristles, after
surprised and agrees. only 6 days of usage,
are frayed.
Owned By Sonali Dhasmana

14. Owned By Sonali Dhasmana