3. INDEX
Acc to Russell.A.L ,
A numerical value describing
the relative status of a population on a
graduated scale with definite upper and lower
limits,which is designed to permit and facilitate
comparison with other population classified by
the same criteria and methods
6. GINGIVITIS
*It is a common and mild form of gum disease that
causes inflammation,irritation and redness of gingiva.
Types: Acute gingivitis
Recurrent gingivitis
Chronic gingivitis
7.
8.
9. GINGIVAL INDEX(GI)
• Developed by Loe H and silness J in 1963.
• For the purpose of assessing the severity of gingivitis
and its location in the four possible areas by examining
only qualitative changes( I.e;the severity of the lesion) of
the gingival soft tissue.
• This index shows good validity,reliability,and ease of use.
11. METHOD: • The severity of gingivitis is scored on all
teeth or on selected index teeth.
12. THE INDEX TEETH ARE:
16 Maxillary right first molar
12 Maxillary left lateral incisor
24 Maxillary left first premolar
36 Mandibular left first molar
32 Mandibular left lateral incisor
44 Mandibular right first premolar
13. • The tissues surrounding each tooth are divided into four
gingival scoring units:
•disto-facial papilla
•facial margin
•mesio-facial papilla
•entire lingual gingival margin
•The teeth and gingiva should be dried lightly with a blast of air
or cotton rolls.
14. SCORING CRITERIA
• Score Criteria
0 Absence of inflammation/normal gingiva
1 Mild inflammation,slight change in
color,slight edema;no bleeding on
probing.
2 Moderate inflammation;moderate
glazing,redness,edema and
hypertrophy,bleeding on probing
3 Severe inflammation;marked redness
and hypertrophy,ulceration,tendency to
spontaneous bleeding.
16. CALCULATION:
💥GI score for the area :
-Each area (disto-facial,facial,mesio-facial,lingual) is assigned a score
from 0 to 3
💥 GI score for a tooth:
-The scores from the four areas of the tooth are added and then
divided by four.
💥GI score for the individual:
-The indices for each of the teeth are added and then divided by the
total number of teeth examined.The score range from 0 to 3
17. 💥GI score for a group:
-The indices for each member of a group or population is
added up and then divided by the total number of individuals in
the group or population
Gingival scores Condition
0.1- 1.0 Mild gingivitis
1.1-2.0 Moderate
gingivitis
2.1-3.0 Severe gingivitis
18. USES:
1.To determine the prevalence and severity of
gingivitis in epidemiologic surveys.
2. For assessment of severity of gingivitis in
individual dentition
3. In controlled clinical trials of preventive or
therapeutic agents.