Prevalence Study of Oral Hygiene and Dental Health

FATIMA A HUSSAIN, RAVIKUMAR CHOCKALINGAM

Appendix (Page 1 of 3)

Appendix A

Detailed DMFT methodology

Methodology 8 - DMFT is a numerical expression of the prevalence of dental caries lesions in a patient, obtained by counting the number of decayed, missing, and filled teeth that a patient has. We will be considering all 32 teeth, as recommended by the third edition of “Oral Health Surveys - Basic Methods”, Geneva 1987. For children under 15 years of age, only 20 primary teeth will be considered and data will be designated in lower case (DMFT).

The DMFT score is a sum of the number of teeth with complete 9 caries lesions (D), the number of extracted teeth (M), and the number of teeth with fillings or crowns (F).

If a tooth is both filled and has a caries lesion, it is considered a decayed tooth only, thus the highest possible DMFT value is 32 (or 20), where every tooth is affected.

Data presentation 10

%PP (%pp) - percentage of population affected with dental caries

%D (%d) - percentage of population with decayed teeth

DT (dt) - mean number of decayed teeth

FT (ft) - mean number of filled teeth

MT (mt) - mean number of missing teeth

MNT (mnt) - mean number of teeth

%Ed (N/A) - percentage edentulous (toothless)

Appendix B

Details of periodontal disease scoring systems

NPDI Methodology 11: According to the Universal Tooth numbering system, the following six teeth will be examined:

(1) 3

(2) 9

(3) 12

(4) 19

(5) 25

(6) 28

If numbers 3, 12, 19, or 28 are missing, the next most posterior tooth will be examined.

If 9 or 25 is missing, substitution of the nearest incisor will be made, if the incisors are missing, a cuspid will serve as the substitute (See Appendix A).

The Gingival Score is on a 0, 1, or 2 point scale 12:

0 refers to a gingival tissue that is normal in color and tightly secured to the tooth with no exudate fluid present, and no obvious problems. For a score of zero, routine dental care will be recommended.

1 refers to inflammation of the gums, periodontal pockets that are present but do not completely surround the tooth, caries without accompanying signs or symptoms, spontaneous periodontal bleeding, and/or suspicious white/red soft tissue areas. For a score of one, a dental visit is recommended within the next several weeks.

2 refers to inflammation completely circulating the tooth, signs or symptoms that include pain, infection, swelling, and/or ulcerations lasting for more than two weeks (determined by questioning). For a score of two, immediate dental treatment is recommended.

8 World Oral Health Country/Area Profile Programme: Caries Prevalence     (Continue reading)

9 Partial caries lesions are ignored in the DMFT model     (Continue reading)

10 WHO Global InfoBase: India: All Data - Dental Caries Prevalence and Severity     (Continue reading)

11 Institute for Algorithmic Medicine: 2007     (Continue reading)

12 Association of State and Territorial Dental Directors: 2003     (Continue reading)

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