Dislocations and Dissolution in Apatites: Theoretical Considerations

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Abstract
In biological, synthetic and natural apatites, dislocations (linear lattice defects) play an important role. Human and bovine enamel, synthetic hydroxy-, fluor- and bromoapatite as well as natural fluorapatite, in contact with various acids all shown an initial dissolution behavior characteristic for the presence of dislocations. So-called hollow dislocations (possessing a hollow core) have been experimentally observed. This phenomenon seems to be of importance for both de- and remineralization of biological apatites, especially enamel. The presence of these hollow dislocations with a hollow core, most likely has interesting consequences for amelogenesis, enamel remineralization and caries prevention.

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