The clinical examination included an assessment of the oral hygiene status using the Simplified Oral Hygiene Index (OHI-S) by Greene and Vermillion.
Likewise, the mean Debris Index simplified (DI-S), Calculus Index--Simplified (CI-S) and Simplified Oral Hygiene Index (OHI-S) scores were calculated.
After taking the demographic information, oral hygiene status was evaluated utilizing Simplified Oral Hygiene Index
Given the above and considering the Guidelines of the National Policy to Oral Health Promotion (BRASIL, 2008), which propose that the actions and services must result from an adequate knowledge of the health reality of each location, to construct then an effective resolution practice, this study evaluated the Simplified Oral Hygiene Index (SOHI), a few moments before applying the mouth rinse with NaF at 0.
The Table 5 lists the average of the simplified oral hygiene index obtained for each tooth surface analyzed in order to identify the most impaired ones and to guide the prevention work by dentists at schools.
Oral hygiene was recorded using the Simplified Oral Hygiene Index.
Oral hygiene was evaluated using the Simplified Oral Hygiene Index (debris index + calculus index).
The oral hygiene index values of the children were evaluated with the Simplified Oral Hygiene Index
(OHI-S) (Greene & Vermillion, 1964).
Clinical levels of oral hygiene status were assessed using simplified oral hygiene index
and caries detection was according to WHO caries recording criteria and compared to historic caries incidence in normal children with similar age group in Jordan.
The oral hygiene variables of each subject were assessed using the Simplified Oral Hygiene Index (OHI-S) of Greene, Vermillion  (1964).
Analysis of variance (ANOVA) was used to compare between the groups for oral hygiene indicators, namely debris index, calculus index and simplified oral hygiene index.