TY  - JOUR
AU  - Vulović, Stefan
AU  - Todorović, Aleksandar
AU  - Stančić, Ivica
AU  - Popovac, Aleksandra
AU  - Stašić, Jovana N.
AU  - Vencl, Aleksandar
AU  - Milić-Lemić, Aleksandra
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4288
AB  - To determine if there are any differences in surface characteristics (surface roughness and contact angle) among different CAD/CAM materials indicated for fabricating implant-supported restorations, following all the material preparation protocols provided by the manufacturer. One-hundred forty-four specimens were divided into six groups: RBC (resin-based composite), PMMA (polymethyl methacrylate), PEEK (polyether ether ketone), ZP (zirconia polished), ZG (zirconia glazed) and CoCr4 (CoCr4 alloy). The experimental part included surface roughness (SR) and contact angle of water (WCA) analyses, fulfilled with atomic force microscopy (AFM) and scanning electron microscopy (SEM) view of surface topography. The data were analyzed using Kruskal-Wallis test with a Dunn's post hoc analysis, the correlation between measurements was tested using Spearman's rank correlation coefficient and all data were presented as mean ± SD. ZG specimens were significantly rougher compared to other groups (p ≤ 0.05). The WCA measurements revealed significantly lower mean values in ZG group (p ≤ 0.05), contrary to PEEK and CoCr4, where significantly higher mean values were observed, compared to other groups (p ≤ 0.05). There exist a moderate negative correlation between the SR and WCA (ρ =  0.41). AFM 3D and SEM 2D images presented more or less heterogeneous surface of all materials. There were statistically significant differences in surface roughness and contact angle among tested material groups. Moderate negative correlation was found between surface roughness and contact angle of tested material groups. The study gives us a better understanding of influence of physicochemical characteristics of investigated materials on their surface properties and provides useful knowledge for future researches in a view of material's behavior under in vivo conditions, when it comes to a question of features related to surface quality, such as microbial adhesion, corrosion, wear, biocompatibility and esthetics.
PB  - Wiley
T2  - Journal of Esthetic and Restorative Dentistry
T1  - Study on the surface properties of different commercially available CAD/CAM materials for implant-supported restorations
EP  - 1141
IS  - 7
SP  - 1132
VL  - 34
DO  - 10.1111/jerd.12958
ER  - 

@article{
author = "Vulović, Stefan and Todorović, Aleksandar and Stančić, Ivica and Popovac, Aleksandra and Stašić, Jovana N. and Vencl, Aleksandar and Milić-Lemić, Aleksandra",
year = "2022",
abstract = "To determine if there are any differences in surface characteristics (surface roughness and contact angle) among different CAD/CAM materials indicated for fabricating implant-supported restorations, following all the material preparation protocols provided by the manufacturer. One-hundred forty-four specimens were divided into six groups: RBC (resin-based composite), PMMA (polymethyl methacrylate), PEEK (polyether ether ketone), ZP (zirconia polished), ZG (zirconia glazed) and CoCr4 (CoCr4 alloy). The experimental part included surface roughness (SR) and contact angle of water (WCA) analyses, fulfilled with atomic force microscopy (AFM) and scanning electron microscopy (SEM) view of surface topography. The data were analyzed using Kruskal-Wallis test with a Dunn's post hoc analysis, the correlation between measurements was tested using Spearman's rank correlation coefficient and all data were presented as mean ± SD. ZG specimens were significantly rougher compared to other groups (p ≤ 0.05). The WCA measurements revealed significantly lower mean values in ZG group (p ≤ 0.05), contrary to PEEK and CoCr4, where significantly higher mean values were observed, compared to other groups (p ≤ 0.05). There exist a moderate negative correlation between the SR and WCA (ρ =  0.41). AFM 3D and SEM 2D images presented more or less heterogeneous surface of all materials. There were statistically significant differences in surface roughness and contact angle among tested material groups. Moderate negative correlation was found between surface roughness and contact angle of tested material groups. The study gives us a better understanding of influence of physicochemical characteristics of investigated materials on their surface properties and provides useful knowledge for future researches in a view of material's behavior under in vivo conditions, when it comes to a question of features related to surface quality, such as microbial adhesion, corrosion, wear, biocompatibility and esthetics.",
publisher = "Wiley",
journal = "Journal of Esthetic and Restorative Dentistry",
title = "Study on the surface properties of different commercially available CAD/CAM materials for implant-supported restorations",
pages = "1141-1132",
number = "7",
volume = "34",
doi = "10.1111/jerd.12958"
}

Vulović, S., Todorović, A., Stančić, I., Popovac, A., Stašić, J. N., Vencl, A.,& Milić-Lemić, A.. (2022). Study on the surface properties of different commercially available CAD/CAM materials for implant-supported restorations. in Journal of Esthetic and Restorative Dentistry
Wiley., 34(7), 1132-1141.
https://doi.org/10.1111/jerd.12958

Vulović S, Todorović A, Stančić I, Popovac A, Stašić JN, Vencl A, Milić-Lemić A. Study on the surface properties of different commercially available CAD/CAM materials for implant-supported restorations. in Journal of Esthetic and Restorative Dentistry. 2022;34(7):1132-1141.
doi:10.1111/jerd.12958 .

Vulović, Stefan, Todorović, Aleksandar, Stančić, Ivica, Popovac, Aleksandra, Stašić, Jovana N., Vencl, Aleksandar, Milić-Lemić, Aleksandra, "Study on the surface properties of different commercially available CAD/CAM materials for implant-supported restorations" in Journal of Esthetic and Restorative Dentistry, 34, no. 7 (2022):1132-1141,
https://doi.org/10.1111/jerd.12958 . .

TY  - JOUR
AU  - Radović, Katarina
AU  - Čairović, Aleksandra
AU  - Todorović, Aleksandar
AU  - Stančić, Ivica
AU  - Grbović, Aleksandar
PY  - 2010
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1109
AB  - Uvod. U lečenju jednostrane krezubosti koriste se različiti oblici mobilnih nadoknada. Jednostrane kompleksne proteze sa preciznim veznim elementima nisu često u upotrebi. Radi rasvetljenja problema jednostrano slobodnog sedla i primene proteze koja ne poseduje veliku spojnicu, u ovom radu je prikazano istraživanje funkcionalnosti ove manje poznate nadoknade. Cilj rada. Cilj rada je bio da se ispitaju i uporede dobijeni naponi jednostrane kompleksne i konvencionalne parcijalne skeletirane proteze pod opterećenjem. Metode rada. U kompjuterskom programu CATIA V5 napravljeni su trodimenzionalni modeli jednostrane kompleksne proteze s odgovarajućim potpornim strukturama (retencioni zubi - očnjak i prvi premolar s namenskim krunicama, alveole i parodontalni prostor) i klasične skeletirane proteze s livenim kukicama. Radi validnosti dobijenih rezultata, modeliranje je obavljeno u prirodnoj veličini. Primenom metode konačnih elemenata izvršena je komparativna analiza vrednosti dobijenih napona pri opterećenju silama od 300 N u predelu drugog premolara, 500 N u predelu prvog molara i 700 N u predelu drugog molara. Rezultati. Proračun je dao sliku ponašanja celog modela jednostrane kompleksne parcijalne proteze s retencionim zubima i sliku celog modela klasične skeletirane parcijalne proteze koje su predstavljene u obliku napona pri različitim uslovima opterećenja. Uneta opterećenja izazvala su visok nivo napona na modelu i zubima nosačima, ali u granicama fiziološke podnošljivosti. Zaključak. Naponi na potpornim strukturama jednostrane kompleksne proteze koji su nastali usled dejstva primenjenih sila bili su u podnošljivim fiziološkim granicama. U uslovima istog opterećenja primenom metode konačnih elemenata dobijaju se veoma slične vrednosti napona jednostrane kompleksne proteze i konvencionalne skeletirane proteze.
AB  - Introduction. Various mobile devices are used in the therapy of unilateral free-end saddle. Unilateral dentures with precise connectivity elements are not used frequently. In this paper the problem of applying and functionality of unilateral freeend saddle denture without major connector was taken into consideration. Objective. The aim was to analyze and compare a unilateral RPD (removable partial denture) and a classical RPD by calculating and analyzing stresses under different loads. Methods. 3D models of unilateral removable partial denture and classical removable partial denture with casted clasps were made by using computer program CATIA V5 (abutment teeth, canine and first premolar, with crowns and abutment tissues were also made). The models were built in full-scale. Stress analyses for both models were performed by applying a force of 300 N on the second premolar, a force of 500 N on the first molar and a force of 700 N on the second molar. Results. The Fault Model Extractor (FME) analysis and calculation showed the complete behavior of unilateral removable partial denture and abutments (canine and first premolar), as well as the behavior of RPD under identical loading conditions. Applied forces with extreme values caused high stress levels on both models and their abutments within physiological limits. Conclusion. Having analyzed stresses under same conditions, we concluded that the unilateral RPD and classical RPD have similar physiological values.
PB  - Srpsko lekarsko društvo, Beograd
T2  - Srpski Arhiv Za Celokupno Lekarstvo
T1  - Komparativna analiza jednostrane i konvencionalne skeletirane proteze primenom metode konačnih elemenata
T1  - Comparative analysis of unilateral removable partial denture and classical removable partial denture by using finite element method
EP  - 713
IS  - 11-12
SP  - 706
VL  - 138
DO  - 10.2298/SARH1012706R
ER  - 

@article{
author = "Radović, Katarina and Čairović, Aleksandra and Todorović, Aleksandar and Stančić, Ivica and Grbović, Aleksandar",
year = "2010",
abstract = "Uvod. U lečenju jednostrane krezubosti koriste se različiti oblici mobilnih nadoknada. Jednostrane kompleksne proteze sa preciznim veznim elementima nisu često u upotrebi. Radi rasvetljenja problema jednostrano slobodnog sedla i primene proteze koja ne poseduje veliku spojnicu, u ovom radu je prikazano istraživanje funkcionalnosti ove manje poznate nadoknade. Cilj rada. Cilj rada je bio da se ispitaju i uporede dobijeni naponi jednostrane kompleksne i konvencionalne parcijalne skeletirane proteze pod opterećenjem. Metode rada. U kompjuterskom programu CATIA V5 napravljeni su trodimenzionalni modeli jednostrane kompleksne proteze s odgovarajućim potpornim strukturama (retencioni zubi - očnjak i prvi premolar s namenskim krunicama, alveole i parodontalni prostor) i klasične skeletirane proteze s livenim kukicama. Radi validnosti dobijenih rezultata, modeliranje je obavljeno u prirodnoj veličini. Primenom metode konačnih elemenata izvršena je komparativna analiza vrednosti dobijenih napona pri opterećenju silama od 300 N u predelu drugog premolara, 500 N u predelu prvog molara i 700 N u predelu drugog molara. Rezultati. Proračun je dao sliku ponašanja celog modela jednostrane kompleksne parcijalne proteze s retencionim zubima i sliku celog modela klasične skeletirane parcijalne proteze koje su predstavljene u obliku napona pri različitim uslovima opterećenja. Uneta opterećenja izazvala su visok nivo napona na modelu i zubima nosačima, ali u granicama fiziološke podnošljivosti. Zaključak. Naponi na potpornim strukturama jednostrane kompleksne proteze koji su nastali usled dejstva primenjenih sila bili su u podnošljivim fiziološkim granicama. U uslovima istog opterećenja primenom metode konačnih elemenata dobijaju se veoma slične vrednosti napona jednostrane kompleksne proteze i konvencionalne skeletirane proteze., Introduction. Various mobile devices are used in the therapy of unilateral free-end saddle. Unilateral dentures with precise connectivity elements are not used frequently. In this paper the problem of applying and functionality of unilateral freeend saddle denture without major connector was taken into consideration. Objective. The aim was to analyze and compare a unilateral RPD (removable partial denture) and a classical RPD by calculating and analyzing stresses under different loads. Methods. 3D models of unilateral removable partial denture and classical removable partial denture with casted clasps were made by using computer program CATIA V5 (abutment teeth, canine and first premolar, with crowns and abutment tissues were also made). The models were built in full-scale. Stress analyses for both models were performed by applying a force of 300 N on the second premolar, a force of 500 N on the first molar and a force of 700 N on the second molar. Results. The Fault Model Extractor (FME) analysis and calculation showed the complete behavior of unilateral removable partial denture and abutments (canine and first premolar), as well as the behavior of RPD under identical loading conditions. Applied forces with extreme values caused high stress levels on both models and their abutments within physiological limits. Conclusion. Having analyzed stresses under same conditions, we concluded that the unilateral RPD and classical RPD have similar physiological values.",
publisher = "Srpsko lekarsko društvo, Beograd",
journal = "Srpski Arhiv Za Celokupno Lekarstvo",
title = "Komparativna analiza jednostrane i konvencionalne skeletirane proteze primenom metode konačnih elemenata, Comparative analysis of unilateral removable partial denture and classical removable partial denture by using finite element method",
pages = "713-706",
number = "11-12",
volume = "138",
doi = "10.2298/SARH1012706R"
}

Radović, K., Čairović, A., Todorović, A., Stančić, I.,& Grbović, A.. (2010). Komparativna analiza jednostrane i konvencionalne skeletirane proteze primenom metode konačnih elemenata. in Srpski Arhiv Za Celokupno Lekarstvo
Srpsko lekarsko društvo, Beograd., 138(11-12), 706-713.
https://doi.org/10.2298/SARH1012706R

Radović K, Čairović A, Todorović A, Stančić I, Grbović A. Komparativna analiza jednostrane i konvencionalne skeletirane proteze primenom metode konačnih elemenata. in Srpski Arhiv Za Celokupno Lekarstvo. 2010;138(11-12):706-713.
doi:10.2298/SARH1012706R .

Radović, Katarina, Čairović, Aleksandra, Todorović, Aleksandar, Stančić, Ivica, Grbović, Aleksandar, "Komparativna analiza jednostrane i konvencionalne skeletirane proteze primenom metode konačnih elemenata" in Srpski Arhiv Za Celokupno Lekarstvo, 138, no. 11-12 (2010):706-713,
https://doi.org/10.2298/SARH1012706R . .