saurabh ohis prestation 07

8/2/2019 saurabh ohis prestation 07

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Oral hygiene index-simplified


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The Simplified Oral Hygiene wasdeveloped by John C Greene and JackR Vermillion in1964

It is a more simplified version but hasequal sensitivity. It comprises of 2 components:DEBRIS INDEX (DI)

CALCULUS INDEX (CI)


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Each of these indexes,is based on numerical determinations

representing the amount of debris orcalculus found on the preselected toothsurfaces.


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(OHI-S) differs from the original OHI(The Oral Hygiene Index) in the number of

the tooth surfaces scored (6 rather than12), the method of selecting the surfacesto be scored, and the scores, which canbe obtained. The criteria used for

assigning scores to the tooth surfaces arethe same as those use for the

OHI (The Oral Hygiene Index).


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SELECTION OF TOOTH SURFACES The six surfaces examined for the OHI-S are

selected from four posterior and two anteriorteeth.

In the posterior portion of the dentition, the firstfully erupted tooth distal to the second bicuspid(15), usually the first molar (16) but sometimesthe second (17) or third molar (18), is examined.

The buccal surfaces of the selected upper molars

and the lingual surfaces of the selected lowermolars are inspected.

In the anterior portion of the mouth, the labialsurfaces of the upper right (11) and the lower leftcentral incisors (31) are scored.

In the absence of either of this anterior teeth, thecentral incisor (21 or 41 respectively) on theopposite side of the midline is substitted.


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Only fully erupted permanent teeth rscored.

Third molars not included.The scoring for the buccal/labial and

lingual surface is based on tooth indesignated segment that has greatest

surface of debris or calculus.


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If a designated tooth is not fullyerupted or has a full crown restorationor has a surface reduced by caries or

trauma, a substitute is made as follows For tooth 16: tooth 17 or tooth 18 for tooth 11: tooth 21 For tooth 26 : tooth 27 or tooth 28 For tooth 36 : tooth 37 or tooth 38 For tooth 31 : tooth 41 For tooth 46 : tooth 47 or tooth 48


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Oral debris: oral debris is the soft foreignmatter loosely attached to the teeth., itconsists of ,mucin, bacteria, and food

debris ( varies in colour from greyish whiteto yellow to orange)

The extent of debris is estimated byrunning the explorer on the side of thetooth

The occkusal or incisal extent of the debrisis noted a it is removed


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Scores Criteria

0 No debris or stain present

1 Soft debris covering not more than one third of the tooth surface, orpresence of extrinsic stains without other debris regardless ofsurface area covered

2 Soft debris covering more than one third, but not more than twothirds, of the exposed tooth surface.

3 Soft debris covering more than two thirds of the exposed tooth

surface.


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Calculus is a hard mineralized substanceadherent to the tooth surface which cannot beremoved by brushing

There are mainly 2 types of calculus which isdifferentiated by location on the tooth inrelation to the free gingival margin.1. Supragingival calculus: deposits, usuallywhite to yellowish brown in color, occlusal to

the free gingival margin2. Subgingival calculus: deposits usually light

brown to black in color, apical to the freegingival margin


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Scores Criteria

0 No calculus present

1 Supra-gingival calculus covering not more than one third of the

exposed tooth surface

2 Supra-gingival calculus covering more than one third but less than

two third of the exposed tooth surface or the presence of individualflecks of sub-gingival calculus around the cervical portion of thetooth or both

3 Supra gingival calculus covering more than two third of the exposedtooth surface or a continuous heavy band of sub-gingival calculusaround the cervical portion of the tooth or both


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For each individual, the debris andcalculus scores are totaled and divided bythe no. of tooth surfaces scored.

Calculation of DI-S= total scoreno. of tooth surfaces examined

Calculation of CI-S = total score

No. of surfaces examined


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For the DI-S and CI-S score GOOD - 0.0 to 0.6 Fair - 0.7 to 1.8 Poor - 1.9 to 3.0

For the OHI-s score, Good - 0.0 to 1.2 Fair - 1.3 to 3.0 Poor - 3.1 to 6.0

For individuals scores are calculated to one decimalpoint

For group scores are obtained by calculating theaverage of the individual scores


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Study of epidemiologyEvaluation of dental health in public

school.Cleansing efficiency of toothbrushes Individuals level of oral cleanliness.

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