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Quantification of tongue coating using quantitative light-induced fluorescence-digital image analysis and its
Raghavendra Shanbhog1, Gunica Harjai, Saisaumya Tiwari
1Department of Paediatric and Preventive Dentistry, JSS Dental College and Hospital, A Constituent College of JSS Academy of Higher Education and Research, Mysore, Karnataka, India.
Summary
Quantitative light-induced fluorescence (QLF) digital imaging reliably assesses tongue coating, correlating significantly with clinical visual scoring in children. This objective method offers a dependable tool for evaluating tongue coating health.
Area of Science:
- Oral health diagnostics
- Biomedical imaging technology
- Quantitative fluorescence analysis
Background:
- Tongue coating is a visible indicator of oral health status.
- Quantitative light-induced fluorescence (QLF) offers objective measurement of tongue coating.
- Traditional visual assessment lacks objective quantification.
Purpose of the Study:
- To evaluate the correlation between visual tongue coating assessment and QLF-digital (QLF-D) imaging.
- To establish the reliability of QLF-D for quantifying tongue coating in children.
Main Methods:
- An in vivo explorative study involving 50 children (11-13 years) with visible tongue coating.
- Clinical assessment using the Tongue Coating Index.
- Digital assessment using QLF-D Biluminator™ 2 and C3 software.
Main Results:
- A statistically significant correlation was observed between visual scoring and QLF-D image analysis.
- QLF-D provides objective data for tongue coating evaluation.
Conclusions:
- The QLF digital tongue imaging system demonstrates reliability in assessing tongue coating.
- QLF-D offers an objective and correlated method compared to clinical scoring.

