Loe, "The gingival index, the plaque index
and the retention index systems," Journal of Periodontology, vol.
One-way analysis of variance (ANOVA) and Levene's test were used to compare the results of the study group with the control group for OHI, denture plaque index
, and the number of bacteria.
The objective of this study was to compare the first-year and the final (sixth)-year dental students at Zagreb University regarding oral health behavior using the HU-DBI, and to estimate the influence of dental training on the oral care regime by determining plaque index
as an indicator of the present oral hygiene level, using the modified Greene-Vermillion method(18).
The difference was significant only in plaque index
in both groups (Figure 5& 6).
The main outcome was the plaque index
(simplified O'Leary)  recorded after each treatment session.
* Plaque Index
(PI) according to Silness--Loe : Each of the four surfaces of the teeth (buccal, lingual, mesial and distal) is given a score from 0-3.
Their sexual function was assessed using the International Index of Erectile Function and their gum health using the plaque index
, bleeding on probing, probing depth and clinical attachment level.
This was followed by recording of Silness and Loe plaque index
[Silness and Loe, 1964].
Now the nitty-gritty: the cancers and deaths were related to the extent of patients' dental plaque measured on a plaque index
. A good index would be 0.5-0.7.
Box 1 Scores for the Plaque and Gingival Indexes The Silness & Loe Plaque Index
(PI) (Silness & Loe, 1964): * Score 0: The tooth surface is clean.