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Related Experiment Videos

Breaking biological barriers with a toothbrush.

K Amano1, K Miyake, J L Borke

  • 1Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta, GA 30912-2000, USA.

Journal of Dental Research
|July 27, 2007
PubMed
Summary
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Toothbrushing causes cell membrane damage in oral tissues, including the gingiva and tongue. This mechanical stress activates gene expression, potentially improving gingival health.

Area of Science:

  • Oral biology
  • Cellular biology
  • Tissue engineering

Background:

  • Toothbrushing is a daily oral hygiene practice.
  • It involves mechanical forces applied to oral tissues.
  • Potential for cellular damage exists during brushing.

Purpose of the Study:

  • To investigate if toothbrushing causes cell wounding in oral tissues.
  • To identify specific cell types affected by brushing-induced injury.
  • To examine the impact on gene expression and barrier function.

Main Methods:

  • Rats' gingivae and tongues were subjected to brushing.
  • Cell disruption was assessed using a specific injury marker.
  • c-fos expression and epithelial barrier function were evaluated.

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Main Results:

  • Brushing significantly increased cells with plasma membrane disruption in gingival epithelium and tongue skeletal muscle.
  • Increased c-fos expression was observed in junctional epithelial and skeletal muscle cells.
  • Epithelial barrier function remained largely unaffected despite individual cell injuries.

Conclusions:

  • Toothbrushing induces plasma membrane disruption in oral cavity cells.
  • Brushing activates gene expression pathways in affected cells.
  • These adaptive changes may contribute to beneficial gingival health.