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[Micromorphological aspects of dentin]

G Goracci1, G Mori

  • 1Corso di Laurea di Odontoiatria e Protesi Dentaria, Università degli Studi di Roma.

Minerva Stomatologica
|September 1, 1995
PubMed
Summary

This study used scanning electron microscopy to analyze dentine structure in healthy teeth. Dentine tubule diameter decreases with distance from the pulp, revealing morphological changes in tooth structure.

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Area of Science:

  • Dental Anatomy
  • Microscopy
  • Biomaterials

Background:

  • Dentine structure is crucial for tooth health and function.
  • Understanding dentinal tubule morphology provides insights into dentine's mechanical properties and response to stimuli.

Purpose of the Study:

  • To investigate the morphological changes in dentine and dentinal tubules at varying distances from the pulp in healthy teeth.
  • To characterize the dimensions and surface features of dentinal tubules.

Main Methods:

  • Scanning electron microscopy (SEM) was employed to examine dentine samples.
  • Dentine was analyzed at different depths relative to the pulp chamber.
  • Morphological features, including tubule diameter and peritubular dentine thickness, were measured.

Main Results:

  • Predentine, composed of collagen fibers, measured approximately 15 microns thick after odontoblast removal.
  • Dentinal tubule diameter decreased with increasing distance from the pulp, from 4 microns near the pulp to 1-2 microns at 1-2 mm distance.
  • Tubular lumen diameter decreased as peritubular dentine thickness increased from 0.8 to 1 micron.
  • The internal surface of tubules exhibited smooth features and confluence with fine lateral canaliculi.
  • Dentinal tubules terminated in branched structures extending towards the enamel.

Conclusions:

  • Dentine exhibits significant morphological variation with distance from the pulp.
  • Dentinal tubule diameter and structure are key features influencing dentine's properties.
  • The observed branching and canaliculi suggest complex fluid transport and structural integrity mechanisms within dentine.

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