Comparative investigations on fluorosed enamel

Area of Science:

• Dental research
• Materials science
• Biomineralization

Background:

• Dental fluorosis is a condition affecting tooth enamel structure.
• Understanding structural changes in fluorosed enamel is crucial for dental health.
• Previous studies have investigated fluorosis, but detailed microstructural analysis is ongoing.

Purpose of the Study:

• To investigate the microstructural alterations in human dental fluorosis.
• To characterize the mineralization patterns and organic matrix of fluorosed enamel.
• To compare findings from various analytical techniques.

Main Methods:

• Human teeth from Nabeul, Tunisia, were analyzed.
• Longitudinal sections were prepared, microradiographed, and examined using Scanning Electron Microscopy (SEM).
• Acid etching, demineralization with EDTA, histochemical staining, and ion microanalysis were employed.

Main Results:

• SEM revealed altered mineralization patterns, surface fissures filled with plaque, and enlarged acid-resistant sheaths.
• The organic matrix in fluorosed enamel appeared as a dense, irregular fibrous network.
• Histochemical staining indicated low Alcian blue and PAS positive content, except near the enamel-dentine junction.

Conclusions:

• Fluorosed enamel shows significant microstructural changes in mineralization and organic matrix.
• Surface and subsurface alterations, including plaque penetration, are characteristic of this condition.
• SEM and histochemical analyses provide valuable insights into fluorosed enamel structure.