Plaque Indices commonly used in dentistry

1. Belarusian State Medical University
Amir Rajae 3rd
year 5th
semester
2017-2018
PLAQUE INDICES
Name of Index Key Teeth Scoring Criteria Interpretation for
Scores
Plaque Index
(PI)
Silness and Loe
(1964)
16,12, 24,36,32,44 Coloring
agent (-)
0 No plaque
1 plaque adhering to the free gingival margin
and adjacent area of the tooth. The plaque may be
seen in situ only after application of disclosing
solution or by using the probe on the tooth surface.
2 Moderate accumulation of soft deposits within
the
gingival pocket, or the tooth and gingival margin
which can be seen with the naked eye.
3 Abundance of soft matter within the gingival
pocket
And/or on the tooth and gingival margin.
𝑃𝐼 =
∑ 𝑆𝑐𝑜𝑟𝑒𝑠 𝑓𝑜𝑟 𝑝𝑙𝑢𝑞𝑒
4 𝑠𝑢𝑟𝑓𝑎𝑐𝑒 × 𝑛𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑡𝑒𝑒𝑡ℎ (6)
0 = Excellent
hygiene
0.1-0.9 = Good
hygiene
1.0-1.9 = Fair
hygiene
2.0-3.0 = Poor
hygiene
The Simplified
Oral Hygiene
Index (OHI-S)
John C. Greene
and Jack R.
Vermillion
(1964)
Coloring agent (-)
0 No Debris/calculus present.
1 Debris/calculus covering not more than one-
third of the exposed tooth surface being examined.
2 Debris/calculus covering more than one-third
but not more than two thirds of the exposed tooth
surface
and /or the presence of individual flecks of
subgingival
calculus around the cervical portion of the tooth.
3 Debris/calculus covering more than two third
of the exposed tooth surface or a continuous heavy
band of subgingival calculus around the cervical
portion
of the tooth.
𝐷𝑒𝑏𝑟𝑖𝑠 𝐼𝑛𝑑𝑒𝑥 =
∑ 𝑆𝑐𝑜𝑟𝑒𝑠 𝑓𝑜𝑟 𝑑𝑒𝑏𝑟𝑖𝑠
6
𝐶𝑎𝑙𝑐𝑢𝑙𝑢𝑠 𝐼𝑛𝑑𝑒𝑥 =
∑ 𝑆𝑐𝑜𝑟𝑒𝑠 𝑓𝑜𝑟 𝑐𝑎𝑙𝑐𝑢𝑙𝑢𝑠
6
𝑂𝐻𝐼 − 𝑆 = ∑ 𝐷𝐼 + 𝐶𝐼
Individually DI-S and CI-S
is scored as follows:
0.0 to 0.6 = Good oral
hygiene
0.7 to 1.8 = Fair oral
hygiene
1.9 to 3.0 = Poor oral
hygiene
An OHI-S is scored as
follows:
0.0-1.2 = Good oral
hygiene
1.3 -3.0 = Fair oral
hygiene
3.1 -6.0 = Poor oral
hygiene
PATIENT
HYGIENE
PERFORMANCE
INDEX
(PHP INDEX)
Podshadley
AG, and Haley
JV (1968)
Coloring agent (+)
The scores range
from 0 to 5 for each
tooth.
0 debris on the
section.
1 no debris.
𝑃𝐻𝑃 =
∑ 𝑆𝑐𝑜𝑟𝑒𝑠 𝑓𝑜𝑟 𝑑𝑒𝑏𝑟𝑖𝑠
6
Excellent = 0 (No
debris)
Good = 0.1-1.7
Fair = 1.8-3.4
Poor = 3.5- 5.0

2. Belarusian State Medical University
Amir Rajae 3rd
year 5th
semester
2017-2018
PLAQUE
CONTROL
RECORD
O’Leary, Drake
TJ, and Naylor
JE (1972)
All teeth are examined.
Four surfaces are examined:
facial, lingual, mesial and
distal.
Coloring agent (+)
Percent with plaque
=
The number of surfaces with plaque
𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑡𝑜𝑜𝑡ℎ 𝑠𝑢𝑟𝑓𝑎𝑐𝑒𝑠 𝑒𝑥𝑎𝑚𝑖𝑛𝑒𝑑
× 100
A score under 10%
is considered good.
TURESKY-
PLAQUE INDEX
Turesky S,
Gilmore ND
(1970)
They examined only the facial
surfaces (gingival third) of
the anterior teeth using basic
fuchsin as a disclosing agent,
and scoring 0 to 5.
Coloring agent (+)
0 No plaque.
1 Separate flecks of plaque at the cervical
margin of the tooth.
2 A thin continuous band of plaque
(up to 1 mm) at the cervical margin of the
tooth.
3 A band of plaque wider than 1 mm coercing
less than one-third of the crown of the tooth.
4 Plaque covering at least one-third but less
than two thirds of the crown of the tooth.
5 Plaque covering two-thirds or more of the
crown of the tooth.
Turesky Index
=
∑ 𝑆𝑐𝑜𝑟𝑒𝑠 𝑓𝑜𝑟 𝑝𝑙𝑢𝑞𝑒
𝑛𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑠𝑢𝑟𝑓𝑎𝑐𝑒𝑠 𝑒𝑥𝑎𝑚𝑖𝑛𝑒𝑑
A score of 0 or 1 is
considered low.
A score of 2 or more
is considered high.