TY  - JOUR
AU  - Ležaja, Maja
AU  - Veljović, Đorđe N.
AU  - Jokić, Bojan M.
AU  - Cvijović-Alagić, Ivana
AU  - Zrilic, Milorad M.
AU  - Miletić, Vesna
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5797
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. (c) 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 101B: 1469-1476, 2013.
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
VL  - 101
IS  - 8
SP  - 1469
EP  - 1476
DO  - 10.1002/jbm.b.32967
ER  - 

@article{
author = "Ležaja, Maja and Veljović, Đorđe N. and Jokić, Bojan M. and Cvijović-Alagić, Ivana and Zrilic, Milorad M. 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. (c) 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 101B: 1469-1476, 2013.",
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",
volume = "101",
number = "8",
pages = "1469-1476",
doi = "10.1002/jbm.b.32967"
}

Ležaja, M., Veljović, Đ. N., Jokić, B. M., Cvijović-Alagić, I., Zrilic, M. 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, 101(8), 1469-1476.
https://doi.org/10.1002/jbm.b.32967

Ležaja M, Veljović ĐN, Jokić BM, Cvijović-Alagić I, Zrilic MM, 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 .

Ležaja, Maja, Veljović, Đorđe N., Jokić, Bojan M., Cvijović-Alagić, Ivana, Zrilic, Milorad M., 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 . .