Crystallites dimensions of enamel.

Area of Science:

• Dental research
• Materials science
• Biomineralization

Background:

• Enamel crystallite size is a critical factor in enamel's mechanical properties and susceptibility to demineralization.
• Understanding variations in crystallite size across different enamel types and conditions is essential for developing effective preventative and restorative dental strategies.

Purpose of the Study:

• To investigate and compare the average diameter of enamel crystallites in various human and bovine enamel samples.
• To analyze the impact of fluorosis and remineralization (in vivo and in vitro) on enamel crystallite dimensions.

Main Methods:

• Scanning electron microscopy (SEM) was employed to examine broken enamel surfaces.
• Corrections were applied for gold layer thickness to ensure accurate crystallite diameter measurements.
• Results were compared with transmission electron microscopy (TEM) data.

Main Results:

• Average crystallite diameters: sound human enamel (36 nm), deciduous human enamel (46 nm), fluorosed human enamel (81 nm).
• Average crystallite diameters: sound bovine enamel (57 nm), in vitro remineralized bovine enamel (97 nm), in vivo remineralized bovine enamel (63 nm).
• SEM and TEM results showed good agreement after gold layer correction.

Conclusions:

• Fluorosed human enamel exhibits substantially larger crystallite diameters compared to sound enamel.
• Differences in in vivo and in vitro remineralized bovine enamel suggest variations in remineralization speed and/or saliva presence influence crystallite growth.