TITLE

Surfactant-modified β-TCP: structure, properties, and in vitro remineralization of subsurface enamel lesions

AUTHOR(S)
Karlinsey, Robert L.; Mackey, Allen C.; Walker, Emily R.; Frederick, Katherine E.
PUB. DATE
July 2010
SOURCE
Journal of Materials Science: Materials in Medicine;Jul2010, Vol. 21 Issue 7, p2009
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A hybrid material comprised of beta-tricalcium phosphate (β-TCP) and sodium lauryl sulfate (SLS) was prepared using a mechanochemical process, examined using particle size analysis, IR spectroscopy, 31P, 23Na, and 13C solid-state NMR spectroscopy, and calcium dissolution experiments, and probed for in vitro remineralization of subsurface enamel lesions. Our results suggest that while the 31P environments of β-TCP remain unchanged during solid-state processing, there is noticeable shifting among the SLS 23Na and 13C environments. Therefore, given the structure of β-TCP, along with our IR examinations and calcium dissolution isotherms, SLS appears to interface strongly with the cation deficient C3 symmetry site of the β-TCP hexagonal crystal lattice with probable emphasis placed on the underbonded CaO3 polyhedra. To demonstrate the utility of the surface-active TCP material in dental applications, we combined the TCP–SLS with 5,000 ppm F (NaF) and evaluated the remineralization potential of subsurface enamel lesions via an in vitro remineralization/demineralization pH cycling dental model. Using surface and longitudinal microhardness measurements, the TCP–SLS plus 5,000 ppm F system was found to significantly boost remineralization of subsurface enamel lesions, with microhardness values increasing up to 30% greater than fluoride alone.
ACCESSION #
51931007

 

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