Tested on Gulf Medical Boards (DHA, SMLE, MOH & HAAD)
Clinical calculations and diagnostic scoring systems like Gingival Index (GI) & Plaque Index (PI) of Löe & Silness frequently appear on Prometric exams. Master high-yield clinical vignettes with instant AI-powered pathophysiology rationales.
What is the Gingival Index (GI) & Plaque Index (PI) of Löe & Silness?
The Gingival Index (GI) & Plaque Index (PI) of Löe & Silness is an evidence-based clinical decision rule engineered to quantify diagnostic probability, stratify clinical severity, and guide therapeutic decision-making in dentistry practice. The Gingival Index (Löe & Silness) and Plaque Index (Silness & Löe) are the foundational dental and periodontal research metrics used to objectively score marginal gingival inflammation and microbial biofilm thickness across Ramfjord / index teeth. Clinical scoring tools like Gingival Index (GI) & Plaque Index (PI) of Löe & Silness 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 benchmark scoring indices for evaluating reversible gingival inflammation and patient plaque control effectiveness.
Formula & Calculation Parameters
The mathematical equation and clinical variables required to calculate Gingival Index (GI) & Plaque Index (PI) of Löe & Silness:
Score Interpretation & Clinical Stratification
| Score Range | Clinical Interpretation | Risk Tier |
|---|---|---|
| ≤ 0.9 | Mild / Good (Score 0.1 - 0.9) | green |
| 1 – 1.9 | Moderate / Fair (Score 1.0 - 1.9) | yellow |
| ≥ 2 | Severe / Poor (Score 2.0 - 3.0) | red |
When to Exercise Caution
Evaluates soft tissue inflammation and superficial plaque; does not measure irreversible periodontal attachment loss or alveolar bone level.
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
- •Löe H, Silness J. Periodontal disease in pregnancy. I. Prevalence and severity. Acta Odontol Scand. 1963;21(6):533-551.
- •Silness J, Löe H. Periodontal disease in pregnancy. II. Correlation between oral hygiene and periodontal condition. Acta Odontol Scand. 1964;22(1):121-135.
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