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Research ArticleResearch

A Comparison of the Efficacy of Charcoal and Non-Charcoal-Bristled Electric Toothbrushes on Coffee Stain Removal and Surface Enamel Roughness: An in vitro study

Shilpa Ajai and Rupali Agnihotri
American Dental Hygienists' Association June 2026, 100 (3) 10-20;
Shilpa Ajai
Department of Periodontology Manipal College of Dental Sciences Manipal Academy of Higher Education Manipal, Karnataka, IND
BDS
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Rupali Agnihotri
Department of Periodontology Manipal College of Dental Sciences Manipal Academy of Higher Education Manipal, Karnataka, IND
MDS
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  • For correspondence: rupali.a{at}manipal.edu
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  • Assessment of tooth samples under a reflectance spectrophotometer and non-contact profilometer
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    Figure 1.

    Assessment of tooth samples under a reflectance spectrophotometer and non-contact profilometer

  • Representative 3D images of the surface enamel at baseline post-brushing protocol.
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    Figure 2.

    Representative 3D images of the surface enamel at baseline post-brushing protocol.

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    Table I.

    Mean and standard deviation of L, a, b at three different time points across groups*

    Mean and standard deviation of L, a, b at three different time points across groups*
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    Table II.

    Intra and intergroup comparisons of ΔL*, Δ a*, Δb* and ΔE* values

    Intra and intergroup comparisons of ΔL*, Δ a*, Δb* and ΔE* values
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    Table III.

    Intra and inter-group comparisons of Ra values post-brushing

    Intra and inter-group comparisons of Ra values post-brushing
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American Dental Hygienists' Association
Vol. 100, Issue 3
June 2026
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A Comparison of the Efficacy of Charcoal and Non-Charcoal-Bristled Electric Toothbrushes on Coffee Stain Removal and Surface Enamel Roughness: An in vitro study
Shilpa Ajai, Rupali Agnihotri
American Dental Hygienists' Association Jun 2026, 100 (3) 10-20;

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A Comparison of the Efficacy of Charcoal and Non-Charcoal-Bristled Electric Toothbrushes on Coffee Stain Removal and Surface Enamel Roughness: An in vitro study
Shilpa Ajai, Rupali Agnihotri
American Dental Hygienists' Association Jun 2026, 100 (3) 10-20;
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Keywords

  • charcoal oral products
  • electric toothbrush
  • stain removal
  • surface roughness
  • whitening

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