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Characterization of Rare‐Earth Oxide Photoactivated Calcium Phosphate Minerals for Resurfacing Teeth
Author(s) -
Elmadani Esam,
Jha Animesh,
Perali Tejaswini,
Jappy Christine,
Walsh David,
Leburn Christopher,
Brown Tom,
Sibbett Wilson,
Duggal Monty,
Toumba Jack
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2012.05324.x
Subject(s) - brushite , calcium , chemistry , dentinal tubule , aqueous solution , nuclear chemistry , phosphate , calcium nitrate , materials science , mineralogy , inorganic chemistry , scanning electron microscope , metallurgy , composite material , organic chemistry
Calcium phosphate ( CaP ) minerals were synthesized with photo‐active erbium oxide ( Er 2 O 3 ), and acid‐resistant phase mixture of aluminum phosphate ( AlPO 4 ) and calcium fluoride ( CaF 2 ) at room temperature via precipitation from the aqueous solution of hydrated calcium nitrate Ca(NO 3 ) 2 · 4H 2 O and ammonium hydrogen phosphate (NH 4 ) 2 HPO 4 . The dominant precipitated phases, characterized by X ‐ray powder diffraction, confirmed the presence of monetite ( CaHPO 4 ) and brushite ( CaHPO 4 · 2H 2 O ) at room temperature. The microstructural analysis showed the presence of platelet‐like features of monetite and brushite, which were tested for occlusion of dentinal tubules via irradiation with a 100 fs pulse duration laser, operating at 1520 nm at 2.5 GHz repetition rate. The SEM analysis of dentinal tubule over the occluded surface showed a continuum of 10 µm layer, which covered several 100s of micrometer surface. The results open the opportunity for dentinal tubule occlusion via ultrafast laser sintering using acid‐resistant minerals.