TY  - JOUR
AU  - Stamenković, Dejan
AU  - Popović, Miljana
AU  - Rudolf, Rebeka
AU  - Zrilić, Milorad
AU  - Raić, Karlo
AU  - Obradović Đuričić, Kosovka
AU  - Stamenković, Dragoslav
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6377
AB  - Since additive technologies in dentistry are gradually replacing metal casting technology, it is necessary to evaluate new dental constructions intended for the development of removable partial denture frameworks. The aim of this research was to evaluate the microstructure and mechanical properties of 3D-printed, laser-melted and -sintered Co–Cr alloys, and perform a comparative study with Co–Cr castings for the same dental purposes. The experiments were divided into two groups. The first group consisted of samples produced by conventional casting of the Co–Cr alloy. The second group consisted of 3D-printed, laser-melted and -sintered specimens produced from a Co–Cr alloy powder divided into three subgroups, depending on the technological parameters chosen for manufacturing (angle, location and heat treatment). Examination of the microstructure was carried out by classical metallographic sample preparation, using optical microscopy and scanning electron microscopy with energy dispersive X-ray spectroscopy (EDX) analysis. A structural phase analysis was also performed by XRD. The mechanical properties were determined using a standard tensile test. The microstructure observation showed a dendritic character in the case of castings, while in the case of 3D-printed, laser-melted and -sintered Co–Cr alloys, the microstructure was typical for additive technologies. The XRD phase analysis confirmed the presence of Co–Cr phases (ε and γ). The results of the tensile test showed remarkably higher yield and tensile strength values and slightly lower elongation of the 3D-printed, laser-melted and -sintered samples than those produced by conventional casting.
PB  - MDPI
T2  - Materials
T1  - Comparative Study of the Microstructure and Properties of Cast-Fabricated and 3D-Printed Laser-Sintered Co–Cr Alloys for Removable Partial Denture Frameworks
IS  - 8
SP  - 3267
VL  - 16
DO  - 10.3390/ma16083267
ER  - 

@article{
author = "Stamenković, Dejan and Popović, Miljana and Rudolf, Rebeka and Zrilić, Milorad and Raić, Karlo and Obradović Đuričić, Kosovka and Stamenković, Dragoslav",
year = "2023",
abstract = "Since additive technologies in dentistry are gradually replacing metal casting technology, it is necessary to evaluate new dental constructions intended for the development of removable partial denture frameworks. The aim of this research was to evaluate the microstructure and mechanical properties of 3D-printed, laser-melted and -sintered Co–Cr alloys, and perform a comparative study with Co–Cr castings for the same dental purposes. The experiments were divided into two groups. The first group consisted of samples produced by conventional casting of the Co–Cr alloy. The second group consisted of 3D-printed, laser-melted and -sintered specimens produced from a Co–Cr alloy powder divided into three subgroups, depending on the technological parameters chosen for manufacturing (angle, location and heat treatment). Examination of the microstructure was carried out by classical metallographic sample preparation, using optical microscopy and scanning electron microscopy with energy dispersive X-ray spectroscopy (EDX) analysis. A structural phase analysis was also performed by XRD. The mechanical properties were determined using a standard tensile test. The microstructure observation showed a dendritic character in the case of castings, while in the case of 3D-printed, laser-melted and -sintered Co–Cr alloys, the microstructure was typical for additive technologies. The XRD phase analysis confirmed the presence of Co–Cr phases (ε and γ). The results of the tensile test showed remarkably higher yield and tensile strength values and slightly lower elongation of the 3D-printed, laser-melted and -sintered samples than those produced by conventional casting.",
publisher = "MDPI",
journal = "Materials",
title = "Comparative Study of the Microstructure and Properties of Cast-Fabricated and 3D-Printed Laser-Sintered Co–Cr Alloys for Removable Partial Denture Frameworks",
number = "8",
pages = "3267",
volume = "16",
doi = "10.3390/ma16083267"
}

Stamenković, D., Popović, M., Rudolf, R., Zrilić, M., Raić, K., Obradović Đuričić, K.,& Stamenković, D.. (2023). Comparative Study of the Microstructure and Properties of Cast-Fabricated and 3D-Printed Laser-Sintered Co–Cr Alloys for Removable Partial Denture Frameworks. in Materials
MDPI., 16(8), 3267.
https://doi.org/10.3390/ma16083267

Stamenković D, Popović M, Rudolf R, Zrilić M, Raić K, Obradović Đuričić K, Stamenković D. Comparative Study of the Microstructure and Properties of Cast-Fabricated and 3D-Printed Laser-Sintered Co–Cr Alloys for Removable Partial Denture Frameworks. in Materials. 2023;16(8):3267.
doi:10.3390/ma16083267 .

Stamenković, Dejan, Popović, Miljana, Rudolf, Rebeka, Zrilić, Milorad, Raić, Karlo, Obradović Đuričić, Kosovka, Stamenković, Dragoslav, "Comparative Study of the Microstructure and Properties of Cast-Fabricated and 3D-Printed Laser-Sintered Co–Cr Alloys for Removable Partial Denture Frameworks" in Materials, 16, no. 8 (2023):3267,
https://doi.org/10.3390/ma16083267 . .

TY  - JOUR
AU  - Tomić, Nataša
AU  - Algellai, Ahmed A.
AU  - Vuksanović, Marija M.
AU  - Trifunović, Dejan
AU  - Dimitrijević, Silvana
AU  - Obradović-Đuričić, Kosovka
AU  - Jančić-Heinemann, Radmila
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3814
AB  - The subject of this study is the quantitative adhesion of a UV-curing composite film based on Bis-GMA (Bisphenol A glycidylmethacrylate) / TEGDMA (triethylene glycol dimethacrylate) as a matrix and particles doped with ferrous oxide on a metal substrate. Two different metal substrates: silver and gold-spattered brass with nickel intermediate coating were used in adhesion evaluating. Adhesion was measured using micro-identation and it was compared with the measured wetting angle of composites to the substrate. It has been shown that the substrates, although with similar mechanical properties that are reflected in very close hardness values, differ by achieved adhesive bonding with the polymer UV-cured polymer film. The addition of ceramic particles in the polymer matrix increased the adhesion of the composite film to both substrates, but the adhesion trend was dependent on the substrate type.
AB  - Predmet ovog istraživanja je kvantitativna procena adhezije između fotopolimerizujućeg kompozitnog filma na bazi Bis-GMA (Bisfenol A glicidilmetakrilata)/TEGDMA (trietilen glikol dimetakrilata) kao matrice i čestica na bazi aluminijum oksida dopiranih gvožđem na metalnoj podlozi. Korišćene su dve različite metalne podloge, jedna od srebra (u daljem tekstu 'srebro') i jedna pozlaćena mesingana pločica sa međuprevlakom od nikla (u daljem tekstu 'zlato'). Adhezija je merena korišćenjem mikroindentacije i upoređena je sa izmerenim uglom kvašenja kompozita na datim podlogama. Pokazalo se da se podloge, iako sličnih mehaničkih svojstava koje se ogledaju u veoma bliskim vrednostima tvrdoće, razlikuju po ostvarenoj adhezivnoj vezi sa polimernim fotopolimerizujućim filmom. Dodatak keramičkih čestica u polimernu matricu dodatno je povećao adheziju kompozitnog filma na obe podloge, dok je trend adhezije u zavisnosti od tipa podloge održan.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - Examination of the adhesion of polymer composite films based on Bis-GMA/TEGDMA on different metal substrates
T1  - Ispitivanje adhezije polimernih kompozitnih filmova na bazi Bis-GMA/TEGDMA na različitim metalnim podlogama
EP  - 222
IS  - 2
SP  - 218
VL  - 73
DO  - 10.5937/tehnika1802218T
ER  - 

@article{
author = "Tomić, Nataša and Algellai, Ahmed A. and Vuksanović, Marija M. and Trifunović, Dejan and Dimitrijević, Silvana and Obradović-Đuričić, Kosovka and Jančić-Heinemann, Radmila",
year = "2018",
abstract = "The subject of this study is the quantitative adhesion of a UV-curing composite film based on Bis-GMA (Bisphenol A glycidylmethacrylate) / TEGDMA (triethylene glycol dimethacrylate) as a matrix and particles doped with ferrous oxide on a metal substrate. Two different metal substrates: silver and gold-spattered brass with nickel intermediate coating were used in adhesion evaluating. Adhesion was measured using micro-identation and it was compared with the measured wetting angle of composites to the substrate. It has been shown that the substrates, although with similar mechanical properties that are reflected in very close hardness values, differ by achieved adhesive bonding with the polymer UV-cured polymer film. The addition of ceramic particles in the polymer matrix increased the adhesion of the composite film to both substrates, but the adhesion trend was dependent on the substrate type., Predmet ovog istraživanja je kvantitativna procena adhezije između fotopolimerizujućeg kompozitnog filma na bazi Bis-GMA (Bisfenol A glicidilmetakrilata)/TEGDMA (trietilen glikol dimetakrilata) kao matrice i čestica na bazi aluminijum oksida dopiranih gvožđem na metalnoj podlozi. Korišćene su dve različite metalne podloge, jedna od srebra (u daljem tekstu 'srebro') i jedna pozlaćena mesingana pločica sa međuprevlakom od nikla (u daljem tekstu 'zlato'). Adhezija je merena korišćenjem mikroindentacije i upoređena je sa izmerenim uglom kvašenja kompozita na datim podlogama. Pokazalo se da se podloge, iako sličnih mehaničkih svojstava koje se ogledaju u veoma bliskim vrednostima tvrdoće, razlikuju po ostvarenoj adhezivnoj vezi sa polimernim fotopolimerizujućim filmom. Dodatak keramičkih čestica u polimernu matricu dodatno je povećao adheziju kompozitnog filma na obe podloge, dok je trend adhezije u zavisnosti od tipa podloge održan.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "Examination of the adhesion of polymer composite films based on Bis-GMA/TEGDMA on different metal substrates, Ispitivanje adhezije polimernih kompozitnih filmova na bazi Bis-GMA/TEGDMA na različitim metalnim podlogama",
pages = "222-218",
number = "2",
volume = "73",
doi = "10.5937/tehnika1802218T"
}

Tomić, N., Algellai, A. A., Vuksanović, M. M., Trifunović, D., Dimitrijević, S., Obradović-Đuričić, K.,& Jančić-Heinemann, R.. (2018). Examination of the adhesion of polymer composite films based on Bis-GMA/TEGDMA on different metal substrates. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 73(2), 218-222.
https://doi.org/10.5937/tehnika1802218T

Tomić N, Algellai AA, Vuksanović MM, Trifunović D, Dimitrijević S, Obradović-Đuričić K, Jančić-Heinemann R. Examination of the adhesion of polymer composite films based on Bis-GMA/TEGDMA on different metal substrates. in Tehnika. 2018;73(2):218-222.
doi:10.5937/tehnika1802218T .

Tomić, Nataša, Algellai, Ahmed A., Vuksanović, Marija M., Trifunović, Dejan, Dimitrijević, Silvana, Obradović-Đuričić, Kosovka, Jančić-Heinemann, Radmila, "Examination of the adhesion of polymer composite films based on Bis-GMA/TEGDMA on different metal substrates" in Tehnika, 73, no. 2 (2018):218-222,
https://doi.org/10.5937/tehnika1802218T . .

TY  - JOUR
AU  - Algellai, Ahmed A.
AU  - Vuksanović, Marija M.
AU  - Tomić, Nataša
AU  - Marinković, Aleksandar
AU  - Obradović-Đuričić, Kosovka
AU  - Radojević, Vesna
AU  - Jančić-Heinemann, Radmila
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3868
AB  - The objective of this study is to investigate quantitative assessment of the adhesion behavior of composite films onto a metallic surface. The composite films had UV cured Bis-GMA (Bisphenol A glycidylmethacrylate)/TEGDMA (triethylene glycol dimethacrylate) as matrix and ferrous oxide doped alumina (Al2O3 Fe) particles with two surface modifications, (3-methacryloxypropyltrimethoxysilane) (MEMO) and the vinyltris(2-methoxyethoxy) silane (VTMOEO), as reinforcement. Composites were made with 0.5, 1.5 and 3 wt% of alumina particles. Adhesion was evaluated using the micro hardness testing method. The contact angle was measured and compared to the adhesive parameter from micro hardness measurements. The form of the indent on the surface of the composite film was analyzed in order to correlate the indent morphology to the adhesion quality.
PB  - Elsevier Science Bv, Amsterdam
T2  - Materials Letters
T1  - The implementation of image analysis for the visualization of adhesion assessment of a composite film
EP  - 28
SP  - 25
VL  - 227
DO  - 10.1016/j.matlet.2018.04.118
ER  - 

@article{
author = "Algellai, Ahmed A. and Vuksanović, Marija M. and Tomić, Nataša and Marinković, Aleksandar and Obradović-Đuričić, Kosovka and Radojević, Vesna and Jančić-Heinemann, Radmila",
year = "2018",
abstract = "The objective of this study is to investigate quantitative assessment of the adhesion behavior of composite films onto a metallic surface. The composite films had UV cured Bis-GMA (Bisphenol A glycidylmethacrylate)/TEGDMA (triethylene glycol dimethacrylate) as matrix and ferrous oxide doped alumina (Al2O3 Fe) particles with two surface modifications, (3-methacryloxypropyltrimethoxysilane) (MEMO) and the vinyltris(2-methoxyethoxy) silane (VTMOEO), as reinforcement. Composites were made with 0.5, 1.5 and 3 wt% of alumina particles. Adhesion was evaluated using the micro hardness testing method. The contact angle was measured and compared to the adhesive parameter from micro hardness measurements. The form of the indent on the surface of the composite film was analyzed in order to correlate the indent morphology to the adhesion quality.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Materials Letters",
title = "The implementation of image analysis for the visualization of adhesion assessment of a composite film",
pages = "28-25",
volume = "227",
doi = "10.1016/j.matlet.2018.04.118"
}

Algellai, A. A., Vuksanović, M. M., Tomić, N., Marinković, A., Obradović-Đuričić, K., Radojević, V.,& Jančić-Heinemann, R.. (2018). The implementation of image analysis for the visualization of adhesion assessment of a composite film. in Materials Letters
Elsevier Science Bv, Amsterdam., 227, 25-28.
https://doi.org/10.1016/j.matlet.2018.04.118

Algellai AA, Vuksanović MM, Tomić N, Marinković A, Obradović-Đuričić K, Radojević V, Jančić-Heinemann R. The implementation of image analysis for the visualization of adhesion assessment of a composite film. in Materials Letters. 2018;227:25-28.
doi:10.1016/j.matlet.2018.04.118 .

Algellai, Ahmed A., Vuksanović, Marija M., Tomić, Nataša, Marinković, Aleksandar, Obradović-Đuričić, Kosovka, Radojević, Vesna, Jančić-Heinemann, Radmila, "The implementation of image analysis for the visualization of adhesion assessment of a composite film" in Materials Letters, 227 (2018):25-28,
https://doi.org/10.1016/j.matlet.2018.04.118 . .

TY  - JOUR
AU  - Ben Hasan, Somaya Ahmed
AU  - Dimitrijević, Marija
AU  - Kojović, Aleksandar
AU  - Stojanović, Dušica
AU  - Obradović-Đuričić, Kosovka
AU  - Jančić-Heinemann, Radmila
AU  - Aleksić, Radoslav
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2748
AB  - Composites with the addition of alumina nanofillers show improvement in mechanical properties.Poly(methyl methacrylate), PMMA, was used as a matrix and two different types of nanofillers having extremely different shapes were added into the matrix to form the composites. The reinforcements were based on alumina nanoparticles having either a spherical shape or whiskers with a length to diameter ratio of 100. The influence of the size and shape of the alumina fillers and the loading on the mechanical properties of the prepared composite were studied using nanoindentation measurements and dynamic mechanical analysis. It was observed that both alumina whiskers and spherical alumina nanoparticles added in the PMMA matrix improved the mechanical properties of the composites, but the improvement was significantly higher with reinforcement by alumina whiskers. The concentration of the reinforcing spherical alumina nanoparticles and alumina whiskers in the PMMA matrix varied up to 5 wt. %. The best performance was obtained by the addition of 3 wt. % of alumina whiskers in the PMMA matrix in terms of the mechanical properties of the obtained composite.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - The effect of the size and shape of alumina nanofillers on the mechanical behavior of PMMA matrix composites
EP  - 1307
IS  - 10
SP  - 1295
VL  - 79
DO  - 10.2298/JSC140121035B
ER  - 

@article{
author = "Ben Hasan, Somaya Ahmed and Dimitrijević, Marija and Kojović, Aleksandar and Stojanović, Dušica and Obradović-Đuričić, Kosovka and Jančić-Heinemann, Radmila and Aleksić, Radoslav",
year = "2014",
abstract = "Composites with the addition of alumina nanofillers show improvement in mechanical properties.Poly(methyl methacrylate), PMMA, was used as a matrix and two different types of nanofillers having extremely different shapes were added into the matrix to form the composites. The reinforcements were based on alumina nanoparticles having either a spherical shape or whiskers with a length to diameter ratio of 100. The influence of the size and shape of the alumina fillers and the loading on the mechanical properties of the prepared composite were studied using nanoindentation measurements and dynamic mechanical analysis. It was observed that both alumina whiskers and spherical alumina nanoparticles added in the PMMA matrix improved the mechanical properties of the composites, but the improvement was significantly higher with reinforcement by alumina whiskers. The concentration of the reinforcing spherical alumina nanoparticles and alumina whiskers in the PMMA matrix varied up to 5 wt. %. The best performance was obtained by the addition of 3 wt. % of alumina whiskers in the PMMA matrix in terms of the mechanical properties of the obtained composite.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "The effect of the size and shape of alumina nanofillers on the mechanical behavior of PMMA matrix composites",
pages = "1307-1295",
number = "10",
volume = "79",
doi = "10.2298/JSC140121035B"
}

Ben Hasan, S. A., Dimitrijević, M., Kojović, A., Stojanović, D., Obradović-Đuričić, K., Jančić-Heinemann, R.,& Aleksić, R.. (2014). The effect of the size and shape of alumina nanofillers on the mechanical behavior of PMMA matrix composites. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 79(10), 1295-1307.
https://doi.org/10.2298/JSC140121035B

Ben Hasan SA, Dimitrijević M, Kojović A, Stojanović D, Obradović-Đuričić K, Jančić-Heinemann R, Aleksić R. The effect of the size and shape of alumina nanofillers on the mechanical behavior of PMMA matrix composites. in Journal of the Serbian Chemical Society. 2014;79(10):1295-1307.
doi:10.2298/JSC140121035B .

Ben Hasan, Somaya Ahmed, Dimitrijević, Marija, Kojović, Aleksandar, Stojanović, Dušica, Obradović-Đuričić, Kosovka, Jančić-Heinemann, Radmila, Aleksić, Radoslav, "The effect of the size and shape of alumina nanofillers on the mechanical behavior of PMMA matrix composites" in Journal of the Serbian Chemical Society, 79, no. 10 (2014):1295-1307,
https://doi.org/10.2298/JSC140121035B . .

TY  - JOUR
AU  - Jokić, Bojan
AU  - Stamenković, Ivan
AU  - Zrilić, Milorad
AU  - Obradović-Đuričić, Kosovka
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2248
AB  - In this study, spherical particles of hydroxyapatite (HA) and alpha-tricalcium phosphate (alpha-Ca-3(PO4)(2): alpha-TCP) doped with different amounts of silicon were used for the preparation of scaffolds. The scaffolds were obtained by a replica foam method using particles of narrow size distribution pre-annealed at 1150 degrees C with different alpha-TCP and HA contents in order to investigate the effect of composition on their morphological and mechanical properties. Morphology, size, and distribution of the particles were characterized using scanning electron microscopy and particle size analyzer. The obtained alpha-TCP-HA scaffolds had compressive strengths up to 5.7 MPa with a uniform and interconnected porous structure. X-ray diffraction analysis used to determine the crystal structure of the scaffolds confirmed that the alpha-TCP-HA content could be controlled by the amount of silicon ions.
PB  - Elsevier Science Bv, Amsterdam
T2  - Materials Letters
T1  - Silicon-doped biphasic alpha-calcium-phosphate/hydroxyapatite scaffolds obtained by a replica foam method using uniform pre-annealed spherical particles
EP  - 158
SP  - 155
VL  - 74
DO  - 10.1016/j.matlet.2012.01.081
ER  - 

@article{
author = "Jokić, Bojan and Stamenković, Ivan and Zrilić, Milorad and Obradović-Đuričić, Kosovka and Petrović, Rada and Janaćković, Đorđe",
year = "2012",
abstract = "In this study, spherical particles of hydroxyapatite (HA) and alpha-tricalcium phosphate (alpha-Ca-3(PO4)(2): alpha-TCP) doped with different amounts of silicon were used for the preparation of scaffolds. The scaffolds were obtained by a replica foam method using particles of narrow size distribution pre-annealed at 1150 degrees C with different alpha-TCP and HA contents in order to investigate the effect of composition on their morphological and mechanical properties. Morphology, size, and distribution of the particles were characterized using scanning electron microscopy and particle size analyzer. The obtained alpha-TCP-HA scaffolds had compressive strengths up to 5.7 MPa with a uniform and interconnected porous structure. X-ray diffraction analysis used to determine the crystal structure of the scaffolds confirmed that the alpha-TCP-HA content could be controlled by the amount of silicon ions.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Materials Letters",
title = "Silicon-doped biphasic alpha-calcium-phosphate/hydroxyapatite scaffolds obtained by a replica foam method using uniform pre-annealed spherical particles",
pages = "158-155",
volume = "74",
doi = "10.1016/j.matlet.2012.01.081"
}

Jokić, B., Stamenković, I., Zrilić, M., Obradović-Đuričić, K., Petrović, R.,& Janaćković, Đ.. (2012). Silicon-doped biphasic alpha-calcium-phosphate/hydroxyapatite scaffolds obtained by a replica foam method using uniform pre-annealed spherical particles. in Materials Letters
Elsevier Science Bv, Amsterdam., 74, 155-158.
https://doi.org/10.1016/j.matlet.2012.01.081

Jokić B, Stamenković I, Zrilić M, Obradović-Đuričić K, Petrović R, Janaćković Đ. Silicon-doped biphasic alpha-calcium-phosphate/hydroxyapatite scaffolds obtained by a replica foam method using uniform pre-annealed spherical particles. in Materials Letters. 2012;74:155-158.
doi:10.1016/j.matlet.2012.01.081 .

Jokić, Bojan, Stamenković, Ivan, Zrilić, Milorad, Obradović-Đuričić, Kosovka, Petrović, Rada, Janaćković, Đorđe, "Silicon-doped biphasic alpha-calcium-phosphate/hydroxyapatite scaffolds obtained by a replica foam method using uniform pre-annealed spherical particles" in Materials Letters, 74 (2012):155-158,
https://doi.org/10.1016/j.matlet.2012.01.081 . .

TY  - JOUR
AU  - Obradović-Đuričić, Kosovka
AU  - Medić, Vesna
AU  - Radišić, Marina
AU  - Laušević, Mila
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5633
AB  - This study examined the possible correlation between the degree of conversion (DC) and the amount of substances eluted from three commercial cured resin-based cements. The DC of the various resin-based cements was measured by Raman spectroscopy, while the quantity of unreacted monomers released from the cement matrix (triethylene glycol dimethacrylate, TEGDMA, urethane dimethacrylate, UDMA, 2-hydroxyethyl methacrylate, HEMA and bisphenol A) was determined by high pressure liquid chromatography (HPLC). The obtained results, after multiple statistical evaluation (one way ANOVA, LSD post hoc test), showed no significant differences in the DC values between the resin cements. On the contrary, the results of the HPLC analysis depicted statistically significant differences between the three materials with respect to the amount of leached monomers. In addition, no correlation between the DC and the amount of eluted substances from the tested cured composite cements was found.
AB  - Rad istražuje moguću korelaciju stepena konverzije (DC) i količine oslobođenih monomernih supstanci iz tri komercijalna preparata kompozitnih dentalnih cemenata. Stepen konverzije kompozitnih cemenata određen je metodom Raman spektroskopije, dok je količina neizreagovalih i oslobođenih monomera iz cementnog matriksa detektovana pomoću HPLC metode. Rezultati dobijeni nakon višestruke statističke evaluacije (one way ANOVA, LSD past hoc test) ne pokazuju značajne razlike u stepenu konverzije različitih preparata kompozitnih cemenata. Nasuprot tome, rezultati HPLC analize beleže značajne razlike u količini i vrsti monomernih supstanci otpuštenih iz kompozitnih cemenata. Takođe, statistička analiza u okviru ove studije nije pokazala korelaciju stepena konverzije ispitivanih kompozitnih dentalnih cemenata i količine oslobođenih supstanci iz ovih materijala.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Correlation between the degree of conversion and the elution of leachable components from dental resin-based cements
T1  - Korelacija stepena konverzije i količine oslobođenih supstanci iz dentalnih kompozitnih cemenata
EP  - 1323
IS  - 9
SP  - 1307
VL  - 76
DO  - 10.2298/JSC100610113O
ER  - 

@article{
author = "Obradović-Đuričić, Kosovka and Medić, Vesna and Radišić, Marina and Laušević, Mila",
year = "2011",
abstract = "This study examined the possible correlation between the degree of conversion (DC) and the amount of substances eluted from three commercial cured resin-based cements. The DC of the various resin-based cements was measured by Raman spectroscopy, while the quantity of unreacted monomers released from the cement matrix (triethylene glycol dimethacrylate, TEGDMA, urethane dimethacrylate, UDMA, 2-hydroxyethyl methacrylate, HEMA and bisphenol A) was determined by high pressure liquid chromatography (HPLC). The obtained results, after multiple statistical evaluation (one way ANOVA, LSD post hoc test), showed no significant differences in the DC values between the resin cements. On the contrary, the results of the HPLC analysis depicted statistically significant differences between the three materials with respect to the amount of leached monomers. In addition, no correlation between the DC and the amount of eluted substances from the tested cured composite cements was found., Rad istražuje moguću korelaciju stepena konverzije (DC) i količine oslobođenih monomernih supstanci iz tri komercijalna preparata kompozitnih dentalnih cemenata. Stepen konverzije kompozitnih cemenata određen je metodom Raman spektroskopije, dok je količina neizreagovalih i oslobođenih monomera iz cementnog matriksa detektovana pomoću HPLC metode. Rezultati dobijeni nakon višestruke statističke evaluacije (one way ANOVA, LSD past hoc test) ne pokazuju značajne razlike u stepenu konverzije različitih preparata kompozitnih cemenata. Nasuprot tome, rezultati HPLC analize beleže značajne razlike u količini i vrsti monomernih supstanci otpuštenih iz kompozitnih cemenata. Takođe, statistička analiza u okviru ove studije nije pokazala korelaciju stepena konverzije ispitivanih kompozitnih dentalnih cemenata i količine oslobođenih supstanci iz ovih materijala.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Correlation between the degree of conversion and the elution of leachable components from dental resin-based cements, Korelacija stepena konverzije i količine oslobođenih supstanci iz dentalnih kompozitnih cemenata",
pages = "1323-1307",
number = "9",
volume = "76",
doi = "10.2298/JSC100610113O"
}

Obradović-Đuričić, K., Medić, V., Radišić, M.,& Laušević, M.. (2011). Correlation between the degree of conversion and the elution of leachable components from dental resin-based cements. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 76(9), 1307-1323.
https://doi.org/10.2298/JSC100610113O

Obradović-Đuričić K, Medić V, Radišić M, Laušević M. Correlation between the degree of conversion and the elution of leachable components from dental resin-based cements. in Journal of the Serbian Chemical Society. 2011;76(9):1307-1323.
doi:10.2298/JSC100610113O .

Obradović-Đuričić, Kosovka, Medić, Vesna, Radišić, Marina, Laušević, Mila, "Correlation between the degree of conversion and the elution of leachable components from dental resin-based cements" in Journal of the Serbian Chemical Society, 76, no. 9 (2011):1307-1323,
https://doi.org/10.2298/JSC100610113O . .

TY  - JOUR
AU  - Jokić, Bojan
AU  - Janković-Častvan, Ivona
AU  - Veljović, Đorđe
AU  - Bučevac, Dušan
AU  - Obradović-Đuričić, Kosovka
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2007
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1030
AB  - The aim of this work is the investigation of alpha-tricalcium-phosphate (alpha-TCP) formation from calcium-deficient hydroxyapatite (CDHAP), synthesized by hydrothermal method from CaCl2, EDTA, NaH2PO4 center dot 2H(2)O and urea as precursors at 160 degrees C. Further, the influence of Ca/P ratios in the starting solution on alpha-TCP formation and the settings of obtained cements in simulated body fluid (SBF) were investigated. According to the results of X-ray, FTIR and SEM analyses, it is shown that CDHAP is transformed to beta-TCP at 800 degrees C, and to alpha-TCP at 1200 degrees C. Almost complete transformation of CDHAP into alpha-TCP occur after heating at 1500 degrees C in the case when Ca/P ratio in starting solution was 1,42. Cement powder mixed with the cement liquid (2.5 wt.% solution of Na2HPO4) completely hydrolyzes after 7 days in SBF, forming only CDHAP phase.
PB  - Natl Inst Optoelectronics, Bucharest-Magurele
T2  - Journal of Optoelectronics and Advanced Materials
T1  - Synthesis and settings behavior of alpha-TCP from calcium deficient hyroxyapatite obtained by hydrothermal method
EP  - 1910
IS  - 6
SP  - 1904
VL  - 9
UR  - https://hdl.handle.net/21.15107/rcub_vinar_2574
ER  - 

@article{
author = "Jokić, Bojan and Janković-Častvan, Ivona and Veljović, Đorđe and Bučevac, Dušan and Obradović-Đuričić, Kosovka and Petrović, Rada and Janaćković, Đorđe",
year = "2007",
abstract = "The aim of this work is the investigation of alpha-tricalcium-phosphate (alpha-TCP) formation from calcium-deficient hydroxyapatite (CDHAP), synthesized by hydrothermal method from CaCl2, EDTA, NaH2PO4 center dot 2H(2)O and urea as precursors at 160 degrees C. Further, the influence of Ca/P ratios in the starting solution on alpha-TCP formation and the settings of obtained cements in simulated body fluid (SBF) were investigated. According to the results of X-ray, FTIR and SEM analyses, it is shown that CDHAP is transformed to beta-TCP at 800 degrees C, and to alpha-TCP at 1200 degrees C. Almost complete transformation of CDHAP into alpha-TCP occur after heating at 1500 degrees C in the case when Ca/P ratio in starting solution was 1,42. Cement powder mixed with the cement liquid (2.5 wt.% solution of Na2HPO4) completely hydrolyzes after 7 days in SBF, forming only CDHAP phase.",
publisher = "Natl Inst Optoelectronics, Bucharest-Magurele",
journal = "Journal of Optoelectronics and Advanced Materials",
title = "Synthesis and settings behavior of alpha-TCP from calcium deficient hyroxyapatite obtained by hydrothermal method",
pages = "1910-1904",
number = "6",
volume = "9",
url = "https://hdl.handle.net/21.15107/rcub_vinar_2574"
}

Jokić, B., Janković-Častvan, I., Veljović, Đ., Bučevac, D., Obradović-Đuričić, K., Petrović, R.,& Janaćković, Đ.. (2007). Synthesis and settings behavior of alpha-TCP from calcium deficient hyroxyapatite obtained by hydrothermal method. in Journal of Optoelectronics and Advanced Materials
Natl Inst Optoelectronics, Bucharest-Magurele., 9(6), 1904-1910.
https://hdl.handle.net/21.15107/rcub_vinar_2574

Jokić B, Janković-Častvan I, Veljović Đ, Bučevac D, Obradović-Đuričić K, Petrović R, Janaćković Đ. Synthesis and settings behavior of alpha-TCP from calcium deficient hyroxyapatite obtained by hydrothermal method. in Journal of Optoelectronics and Advanced Materials. 2007;9(6):1904-1910.
https://hdl.handle.net/21.15107/rcub_vinar_2574 .

Jokić, Bojan, Janković-Častvan, Ivona, Veljović, Đorđe, Bučevac, Dušan, Obradović-Đuričić, Kosovka, Petrović, Rada, Janaćković, Đorđe, "Synthesis and settings behavior of alpha-TCP from calcium deficient hyroxyapatite obtained by hydrothermal method" in Journal of Optoelectronics and Advanced Materials, 9, no. 6 (2007):1904-1910,
https://hdl.handle.net/21.15107/rcub_vinar_2574 .