Tested on Gulf Medical Boards (DHA, SMLE, MOH & HAAD)
Clinical calculations and diagnostic scoring systems like DMFT / DMFS Dental Caries Index (WHO) frequently appear on Prometric exams. Master high-yield clinical vignettes with instant AI-powered pathophysiology rationales.
What is the DMFT / DMFS Dental Caries Index (WHO)?
The DMFT / DMFS Dental Caries Index (WHO) is an evidence-based clinical decision rule engineered to quantify diagnostic probability, stratify clinical severity, and guide therapeutic decision-making in dentistry practice. The Decayed, Missing, and Filled Teeth (DMFT) index is the universal World Health Organization (WHO) epidemiological metric used in dentistry and public health to quantify lifetime dental caries experience in permanent dentition. Clinical scoring tools like DMFT / DMFS Dental Caries Index (WHO) are essential in acute and outpatient management, enabling clinicians to objectively differentiate between low-risk candidates suitable for conservative therapy and high-risk patients requiring urgent interventions. Verified against current 2026 clinical standards, this tool is extensively tested on Gulf health authority licensing exams including DHA (Dubai), SMLE (Saudi Arabia), MOH, HAAD/DOH (Abu Dhabi), OMSB (Oman), and QCHP (Qatar).
💡Clinical Pearls & Diagnostic Utility
The global standard epidemiological index for evaluating population caries trends, individual caries risk, and effectiveness of public fluoridation programs.
Formula & Calculation Parameters
The mathematical equation and clinical variables required to calculate DMFT / DMFS Dental Caries Index (WHO):
Score Interpretation & Clinical Stratification
| Score Range | Clinical Interpretation | Risk Tier |
|---|---|---|
| ≤ 4.9 | Very Low Caries Severity (DMFT < 5.0) | green |
| 5 – 8.9 | Low Caries Severity (DMFT 5.0 - 8.9) | green |
| 9 – 13.9 | Moderate Caries Severity (DMFT 9.0 - 13.9) | yellow |
| ≥ 14 | High / Very High Caries Severity (DMFT ≥ 14.0) | red |
When to Exercise Caution
Does not account for non-cavitated initial enamel lesions or teeth missing for non-caries reasons (orthodontic extractions, trauma, periodontal disease).
Clinical Review Board
Dr. Muhammad Nouman, MBBS
Capital Medical University | PMDC Reg No: 117744-P
Clinical Audit Status
✓ Verified for 2026 Guidelines
Last updated: 2026-08-08
Peer-Reviewed Medical Literature
- •World Health Organization. Oral health surveys: basic methods - 5th edition. Geneva: World Health Organization; 2013.
- •Broadbent JM, et al. For debate: problems with the DMF index pertinent to dental caries data analysis. Community Dent Oral Epidemiol. 2005;33(6):400-409.
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