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Related Experiment Videos

Parotid gland function and dentin apposition in rat molars.

J Leonora1, L Tjäderhane, J-M Tieche

  • 1Department of Physiology/Pharmacology, Risley Hall, School of Medicine, Loma Linda University, CA 92350, USA. Jleonora@som.llu.edu

Journal of Dental Research
|July 5, 2002
PubMed
Summary

A high-sucrose diet and parotid gland removal both impair dentin formation in rat molars. Parotid gland function positively influences dentin apposition, suggesting its crucial role in tooth development.

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Area of Science:

  • Oral biology
  • Dental research
  • Physiology

Background:

  • Established down-regulating effect of sucrose-rich diets on primary dentinogenesis in rat molars.
  • Observed negative impact of high-sucrose diets on parotid gland function, affecting intradentinal solute movement.

Purpose of the Study:

  • To investigate the potential role of parotid gland function(s) in regulating dentinogenesis.
  • To assess the impact of diet composition and salivary gland removal on dentin apposition.

Main Methods:

  • Measurement of dentin apposition in rat molars using planimetry on sagittal sections.
  • Experimental variables included standard vs. high-sucrose diets, parotidectomy, submandibular/sublingual gland removal, and diet form (powder/pellet).

Main Results:

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  • High-sucrose diet and parotidectomy significantly depressed dentin apposition.
  • Combined high-sucrose diet and parotidectomy resulted in a further decrease in dentin apposition.
  • Removal of submandibular/sublingual glands or changes in diet consistency did not significantly affect dentin apposition.

Conclusions:

  • Parotid glands exert a positive influence on dentin apposition in rat molars.
  • Parotid gland function is a significant factor in regulating dentinogenesis, independent of diet consistency or submandibular/sublingual gland activity.