@misc{10481/46738,
year = {2016},
month = {10},
url = {http://hdl.handle.net/10481/46738},
abstract = {The aim of this research was to assess the ability of amalgam restorations to induce amorphous mineral precipitation at the caries-affected-dentin substrate. Sound and caries-affected dentin surfaces were subjected to both Zn-free and Zn-containing dental amalgam restorations. Specimens were submitted to thermocycling (100,000cy/5 ºC-55 ºC, 3 months). Dentin surfaces were studied by atomic force microscopy (AFM/nano-roughness), X-ray diffraction (XRD2), field emission electron microscopy (FESEM) and energy-dispersive analysis (EDX), for physical and morphological surface characterization. Zn-containing amalgam placement reduced crystallinity, crystallite size and grain size of calcium phosphate crystallites at the dentin surface. Both microstrain and nanoroughness augmented in caries-affected dentin restored with Zn-containing amalgams. Caries-affected dentin showed the shortest mineral crystallites (11.04 nm), when Zn-containing amalgams were used for restorations, probably leading to a decrease of mechanical properties which might favor crack propagation and deformation. Sound dentin restored with Zn-free amalgams exhibited a substantial increase in length of grain particles (12.44 nm) embedded into dentin crystallites. Zn-containing amalgam placement creates dentin mineralization and the resultant mineral was, utterly, amorphous in nature. Amorphous calcium phosphate will provide a local ion-rich environment which is considered favorable for in situ generation of prenucleation clusters, succeeding further dentin remineralization.},
organization = {This work was supported by grants MINECO/FEDER MAT2014-52036-P and
FIS2013-41821-R.},
publisher = {Microscopy Society of America},
keywords = {Dentin},
keywords = {Zinc},
keywords = {Mineral},
keywords = {XRD},
keywords = {AFM},
title = {Zinc-Containing Restorations Create Amorphous Biogenic Apatite at the Carious Dentin Interface: A X-Ray Diffraction (XRD) Crystal Lattice Analysis},
doi = {10.1017/S1431927616011697},
author = {Toledano Pérez, Manuel and Sánchez Aguilera, Fátima and López López, Modesto Torcuato and Osorio Ruiz, María Estrella and Toledano Osorio, Manuel and Osorio Ruiz, Raquel},
}