TY  - JOUR
AU  - Lezaja, Maja
AU  - Veljović, Đorđe
AU  - Jokić, Bojan
AU  - Cvijović-Alagić, Ivana
AU  - Zrilić, Milorad
AU  - Miletić, Vesna
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2471
AB  - This study investigated the effect of shape, size, and surface modification of hydroxyapatite (HAP) fillers on the degree of conversion (DC) and mechanical properties of a model BisGMA/TEGDMA composite initially and after 4 weeks of storage. Ten percent of conventional glass fillers were replaced by HAP spheres (Sph), silicon-doped spheres (Sph(Si)), whiskers (Wh), silicon-doped whiskers (Wh(Si)), and nanosized HAP particles (Nano). Spheres were specifically structured agglomerates consisting of a central void and radially orientated primary particles, whereas whiskers were compact monocrystals. DC, Vickers hardness (HV), flexural strength (Fs), flexural modulus (Ef), compressive strength (Cs), and compressive modulus (Ec) were tested. There were no significant differences in the DC between all tested groups. HV decreased by 5.4-17% with the addition of HAP, while Fs increased by 13.9-29% except in Nano group (decrease by 13%). After storage, Sph and Sph(Si) groups showed similar HV, Ef, Cs and Ec and higher Fs than the control. The fracture mode of HAP spheres was through the central void whereas whiskers showed longitudinal delamination, transverse, and mixed fractures. HAP spheres with or without silicon- doping have a potential to be part of the filler content of dental composites.
PB  - Wiley-Blackwell, Hoboken
T2  - Journal of Biomedical Materials Research Part B-Applied Biomaterials
T1  - Effect of hydroxyapatite spheres, whiskers, and nanoparticles on mechanical properties of a model BisGMA/TEGDMA composite initially and after storage
EP  - 1476
IS  - 8
SP  - 1469
VL  - 101
DO  - 10.1002/jbm.b.32967
ER  - 

@article{
author = "Lezaja, Maja and Veljović, Đorđe and Jokić, Bojan and Cvijović-Alagić, Ivana and Zrilić, Milorad and Miletić, Vesna",
year = "2013",
abstract = "This study investigated the effect of shape, size, and surface modification of hydroxyapatite (HAP) fillers on the degree of conversion (DC) and mechanical properties of a model BisGMA/TEGDMA composite initially and after 4 weeks of storage. Ten percent of conventional glass fillers were replaced by HAP spheres (Sph), silicon-doped spheres (Sph(Si)), whiskers (Wh), silicon-doped whiskers (Wh(Si)), and nanosized HAP particles (Nano). Spheres were specifically structured agglomerates consisting of a central void and radially orientated primary particles, whereas whiskers were compact monocrystals. DC, Vickers hardness (HV), flexural strength (Fs), flexural modulus (Ef), compressive strength (Cs), and compressive modulus (Ec) were tested. There were no significant differences in the DC between all tested groups. HV decreased by 5.4-17% with the addition of HAP, while Fs increased by 13.9-29% except in Nano group (decrease by 13%). After storage, Sph and Sph(Si) groups showed similar HV, Ef, Cs and Ec and higher Fs than the control. The fracture mode of HAP spheres was through the central void whereas whiskers showed longitudinal delamination, transverse, and mixed fractures. HAP spheres with or without silicon- doping have a potential to be part of the filler content of dental composites.",
publisher = "Wiley-Blackwell, Hoboken",
journal = "Journal of Biomedical Materials Research Part B-Applied Biomaterials",
title = "Effect of hydroxyapatite spheres, whiskers, and nanoparticles on mechanical properties of a model BisGMA/TEGDMA composite initially and after storage",
pages = "1476-1469",
number = "8",
volume = "101",
doi = "10.1002/jbm.b.32967"
}

Lezaja, M., Veljović, Đ., Jokić, B., Cvijović-Alagić, I., Zrilić, M.,& Miletić, V.. (2013). Effect of hydroxyapatite spheres, whiskers, and nanoparticles on mechanical properties of a model BisGMA/TEGDMA composite initially and after storage. in Journal of Biomedical Materials Research Part B-Applied Biomaterials
Wiley-Blackwell, Hoboken., 101(8), 1469-1476.
https://doi.org/10.1002/jbm.b.32967

Lezaja M, Veljović Đ, Jokić B, Cvijović-Alagić I, Zrilić M, Miletić V. Effect of hydroxyapatite spheres, whiskers, and nanoparticles on mechanical properties of a model BisGMA/TEGDMA composite initially and after storage. in Journal of Biomedical Materials Research Part B-Applied Biomaterials. 2013;101(8):1469-1476.
doi:10.1002/jbm.b.32967 .

Lezaja, Maja, Veljović, Đorđe, Jokić, Bojan, Cvijović-Alagić, Ivana, Zrilić, Milorad, Miletić, Vesna, "Effect of hydroxyapatite spheres, whiskers, and nanoparticles on mechanical properties of a model BisGMA/TEGDMA composite initially and after storage" in Journal of Biomedical Materials Research Part B-Applied Biomaterials, 101, no. 8 (2013):1469-1476,
https://doi.org/10.1002/jbm.b.32967 . .