Abstract:
:The kinetics of growth of calcium phosphates on synthetic hydroxyapatite (HAP), human enamel, whole dentin, and human calculus has been studied at 37 C at pH values from 4.97 to 5.10 held constant by the pH-stat addition of base. Following an initial induction period, dicalcium phosphate dihydrate (DCPD) crystallization takes place on the surface of these solids in all cases, even though the solutions are highly supersaturated with respect to HAP. The second order crystal growth kinetics are characteristic of the crystallization of DCPD on pure DCPD seed material. The ability of the substrate surfaces to nucleate DCPD falls in the order, synthetic HAP greater than enamel greater than calculus greater than dentin. Nucleation of DCPD, which is completed during the initial induction period, is very sensitive to small changes in pH, from 4.99 to 5.10.
journal_name
J Dent Resjournal_title
Journal of dental researchauthors
Barone JP,Nancollas GHdoi
10.1177/00220345780570010901subject
Has Abstractpub_date
1978-01-01 00:00:00pages
153-61issue
1eissn
0022-0345issn
1544-0591journal_volume
57pub_type
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