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TACT imaging of primary caries
D A Tyndall1, T L Clifton, R L Webber
1Department of Diagnostic Sciences, University of North Carolina, School of Dentistry, Chapel Hill, USA.
Summary
Tuned-aperture computed tomography (TACT) showed comparable diagnostic efficacy to traditional film for detecting primary dental caries and determining lesion depth. Both TACT and film outperformed direct digital imaging, suggesting potential for improved digital receptor technology.
Area of Science:
- Dentistry
- Radiology
- Medical Imaging
Background:
- Dental caries detection remains a challenge in clinical practice.
- Traditional radiography has limitations in visualizing early carious lesions.
- Tuned-aperture computed tomography (TACT) is a novel imaging technique offering potential for improved 3D radiographic information.
Purpose of the Study:
- To evaluate the diagnostic efficacy of TACT for primary caries detection and depth determination.
- To compare the performance of TACT with D-speed film and direct digital imaging.
Main Methods:
- Sixty-four extracted teeth with 89 carious lesions were imaged using D-speed film, direct digital imaging, and TACT.
- Six observers assessed lesion presence, absence, and depth.
- Microscopic examination served as the ground truth.
- Statistical analyses included logistic regression and analysis of variance.
Main Results:
- TACT and film demonstrated statistically similar accuracy for caries detection (p = 0.2216).
- Both TACT and film were significantly more accurate than direct digital imaging for caries detection (p = 0.0001) and lesion depth determination (p = 0.05).
- No significant difference in diagnostic time was observed among the three modalities.
Conclusions:
- TACT exhibits diagnostic efficacy comparable to film for primary caries detection and depth assessment.
- Direct digital imaging, in its current form, showed poorer performance than film and TACT.
- Advancements in charge-coupled device detector technology may enhance the diagnostic performance of both direct digital and TACT imaging.