Dento maxillo facial radiology · 2026
A pilot study on the detection of proximal caries in permanent anterior human teeth using lateral short-wave infrared transillumination at 1300 nm.
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Benz Leander, Litzenburger Friederike, Walter Elias, Schwendicke Falk, Heck Katrin
Аннотация
OBJECTIVES: This pilot study aimed to evaluate the diagnostic performance of short-wave infrared transillumination at 1300 nm for detecting proximal caries lesions in permanent anterior teeth, compared with digital radiography.
METHODS: Seventeen extracted human permanent anterior teeth were examined using short-wave infrared transillumination from both labial and oral directions. Images were acquired using a 1300-nm light-emitting diode and a short-wave infrared camera. Radiographs were obtained using a standard digital radiography setup. Micro-CT served as the reference standard. Two calibrated examiners independently assessed the presence or absence of caries lesions. Statistical analysis included sensitivity, specificity and overall accuracy. Inter-examiner agreement was assessed using kappa statistics.
RESULTS: Proximal surfaces were analysed. Short-wave infrared transillumination demonstrated higher diagnostic accuracy from oral (86%), labial (79%), and combined (90%) views compared to radiography (66%). The combined approach yielded a sensitivity of 86% and a specificity of 93%. In contrast, radiography achieved a sensitivity of 29% and a specificity of 100%. Inter-examiner agreement was substantial to almost perfect for all methods.
CONCLUSION: This pilot study shows that short-wave infrared transillumination at 1300 nm provides significantly greater diagnostic accuracy than radiography for detecting proximal caries in anterior teeth and may serve as a radiation-free adjunct in clinical diagnostics.
ADVANCES IN KNOWLEDGE: This is the first pilot study to demonstrate that combining labial and oral short-wave infrared transillumination enables accurate detection of proximal caries in anterior teeth and offers potential as a novel diagnostic tool.
METHODS: Seventeen extracted human permanent anterior teeth were examined using short-wave infrared transillumination from both labial and oral directions. Images were acquired using a 1300-nm light-emitting diode and a short-wave infrared camera. Radiographs were obtained using a standard digital radiography setup. Micro-CT served as the reference standard. Two calibrated examiners independently assessed the presence or absence of caries lesions. Statistical analysis included sensitivity, specificity and overall accuracy. Inter-examiner agreement was assessed using kappa statistics.
RESULTS: Proximal surfaces were analysed. Short-wave infrared transillumination demonstrated higher diagnostic accuracy from oral (86%), labial (79%), and combined (90%) views compared to radiography (66%). The combined approach yielded a sensitivity of 86% and a specificity of 93%. In contrast, radiography achieved a sensitivity of 29% and a specificity of 100%. Inter-examiner agreement was substantial to almost perfect for all methods.
CONCLUSION: This pilot study shows that short-wave infrared transillumination at 1300 nm provides significantly greater diagnostic accuracy than radiography for detecting proximal caries in anterior teeth and may serve as a radiation-free adjunct in clinical diagnostics.
ADVANCES IN KNOWLEDGE: This is the first pilot study to demonstrate that combining labial and oral short-wave infrared transillumination enables accurate detection of proximal caries in anterior teeth and offers potential as a novel diagnostic tool.