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In vivo Structural Assessments of Ocular Disease in Rodent Models using Optical Coherence Tomography
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Evaluating a novel fissure caries model using swept source optical coherence tomography.

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Swept Source Optical Coherence Tomography (SS-OCT) effectively assesses artificial fissure caries depth. However, SS-OCT reflectivity images do not accurately predict lesion width or mineral density in this novel caries model.

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Area of Science:

  • Dental Research
  • Biomedical Imaging
  • Caries Detection

Background:

  • Dental caries, particularly in fissures, remains a significant challenge in oral health.
  • Accurate, non-destructive imaging techniques are crucial for early detection and monitoring of caries progression.
  • Novel methods are needed to assess artificial caries models for improved understanding of demineralization.

Purpose of the Study:

  • To evaluate the efficacy of Swept Source Optical Coherence Tomography (SS-OCT) in assessing a novel artificial fissure caries model.
  • To compare SS-OCT imaging with high-resolution X-ray tomography for quantifying artificial lesions.
  • To determine the predictive capability of SS-OCT reflectivity for demineralization depth, width, and mineral density.

Main Methods:

  • Artificial fissure caries lesions were created and imaged using near-infrared SS-OCT.
  • High-resolution X-ray tomography was used as a comparative non-destructive imaging modality.
  • Relative reflectivity of demineralized versus sound fissures was analyzed.

Main Results:

  • Demineralized fissures exhibited significantly higher mean relative reflectivity (at least 6 times) compared to sound fissures (p<0.02).
  • SS-OCT reflectivity images accurately predicted the depth of fissure demineralization.
  • SS-OCT reflectivity did not accurately predict the width of demineralized lesions.
  • The relative reflectivity from SS-OCT could not accurately determine the mineral density of the lesions.

Conclusions:

  • SS-OCT is effective in detecting subsurface fissure demineralization.
  • SS-OCT can be utilized to determine if demineralization is progressing towards the enamel-dentin junction.
  • While SS-OCT shows promise for assessing demineralization depth, limitations exist in predicting lesion width and mineral density.