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  - Glišić, Mirko
AU  - Stamenković, Dragoslav
AU  - Grbović, Aleksandar
AU  - Todorović, Aleksandar
AU  - Marković, Aleksa
AU  - Trifković, Branka
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2337
AB  - Uvod Razlike u odgovoru zuba i implantata na opterećenje mogu imati za posledicu niz bioloških i tehničkih komplikacija u uslovima delovanja okluzalnih sila. Cilj rada Cilj ovog rada je da se analizira distribucija opterećenja kod mešovito nošenih mostova sa primenom rezilijentnog TSA abatmenta (Titan Shock Absorber, BoneCare GmbH Germany), kao i konvencionalnog nerezilijentnog abatmenta primenom metode konačnih elemenata (MKE). Metode rada U ovom radu napravljena su dva osnovna 3D modela. Na jednom implantatu i modelu korišćen je standardni nerezilijentni abatment, a na implantatu drugog modela korišćen je rezilijentni TSA abatment. Na virtuelnom modelu su modelirane konture zuba, PDL-a, sluzokože, implantata, kortikalne i spongiozne kosti, abatmenta i suprastrukture. U eksperimentu je korišćena vertikalna sila od 500 N, koja je primenjena u tri različita slučaja aksijalnog opterećenja. Metodom konačnih elemenata izračunavani su potom Fon Mizesovi ekvivalentni naponi u korenu zuba i parodoncijumu, implantatu i periimplantatnom tkivu. Rezultati Na modelu kod koga je primenjen nerezilijentni abatment, maksimalne vrednosti napona i deformacije u sva tri slučaja su registrovane u kortikalnom delu kosti oko zuba i implantata u zavisnosti od napadne tačke sile (maksimalan napon 49,7 MPa). Vrednosti napona i deformacija na modelu sa primenom rezilijentnog TSA abatmenta pokazale su sličnu raspodelu u kosti, međutim ove vrednosti su višestruko manje nego kod modela sa nerezilijentnim abatmentom (maksimalan napon 28,9 MPa). Zaključak Primena rezilijentnog TSA abatmenta dovodi do ravnomernije raspodele napona i deformacije u koštanom tkivu oko zuba i implantata pod dejstvom vertikalnih sila. Izmerene vrednosti su višestruko manje nego na modelu sa nerezilijentnim abatmentom.
AB  - Introduction Differences between the tooth and implant response to load can lead to many biological and technical implications in the conditions of occlusal forces. Objective The objective of this study was to analyze load distribution in tooth/implant-supported fixed partial dentures with the use of resilient TSA (Titan Shock Absorber, BoneCare GmbH, Augsburg, Germany) abutment and conventional non-resilient abutment using finite element method. Methods This study presents two basic 3D models. For one model a standard non-resilient abutment is used, and on the implant of the second model a resilient TSA abutment is applied. The virtual model contains drawn contours of tooth, mucous membranes, implant, cortical bones and spongiosa, abutment and suprastructure. The experiment used 500 N of vertical force, applied in three different cases of axial load. Calculations of von Mises equivalent stresses of the tooth root and periodontium, implants and peri-implant tissue were made. Results For the model to which a non-resilient abutment is applied, maximum stress values in all three cases are observed in the cortical part of the bone (maximum stress value of 49.7 MPa). Measurements of stress and deformation in the bone tissue in the model with application of the resilient TSA abutment demonstrated similar distribution; however, these values are many times lower than in the model with non-resilient TSA abutment (maximum stress value of 28.9 MPa). Conclusion Application of the resilient TSA abutment results in more equal distribution of stress and deformations in the bone tissue under vertical forces. These values are many times lower than in the model with the non-resilient abutment.
PB  - Srpsko lekarsko društvo, Beograd
T2  - Srpski Arhiv Za Celokupno Lekarstvo
T1  - Analiza distribucije opterećenja kod mešovito nošenih mostova primenom rezilijentnih abatmenata
T1  - Analysis of load distribution in tooth-implant supported fixed partial dentures by the use of resilient abutment
EP  - 195
IS  - 3-4
SP  - 188
VL  - 144
DO  - 10.2298/SARH1604188G
ER  - 

@article{
author = "Glišić, Mirko and Stamenković, Dragoslav and Grbović, Aleksandar and Todorović, Aleksandar and Marković, Aleksa and Trifković, Branka",
year = "2016",
abstract = "Uvod Razlike u odgovoru zuba i implantata na opterećenje mogu imati za posledicu niz bioloških i tehničkih komplikacija u uslovima delovanja okluzalnih sila. Cilj rada Cilj ovog rada je da se analizira distribucija opterećenja kod mešovito nošenih mostova sa primenom rezilijentnog TSA abatmenta (Titan Shock Absorber, BoneCare GmbH Germany), kao i konvencionalnog nerezilijentnog abatmenta primenom metode konačnih elemenata (MKE). Metode rada U ovom radu napravljena su dva osnovna 3D modela. Na jednom implantatu i modelu korišćen je standardni nerezilijentni abatment, a na implantatu drugog modela korišćen je rezilijentni TSA abatment. Na virtuelnom modelu su modelirane konture zuba, PDL-a, sluzokože, implantata, kortikalne i spongiozne kosti, abatmenta i suprastrukture. U eksperimentu je korišćena vertikalna sila od 500 N, koja je primenjena u tri različita slučaja aksijalnog opterećenja. Metodom konačnih elemenata izračunavani su potom Fon Mizesovi ekvivalentni naponi u korenu zuba i parodoncijumu, implantatu i periimplantatnom tkivu. Rezultati Na modelu kod koga je primenjen nerezilijentni abatment, maksimalne vrednosti napona i deformacije u sva tri slučaja su registrovane u kortikalnom delu kosti oko zuba i implantata u zavisnosti od napadne tačke sile (maksimalan napon 49,7 MPa). Vrednosti napona i deformacija na modelu sa primenom rezilijentnog TSA abatmenta pokazale su sličnu raspodelu u kosti, međutim ove vrednosti su višestruko manje nego kod modela sa nerezilijentnim abatmentom (maksimalan napon 28,9 MPa). Zaključak Primena rezilijentnog TSA abatmenta dovodi do ravnomernije raspodele napona i deformacije u koštanom tkivu oko zuba i implantata pod dejstvom vertikalnih sila. Izmerene vrednosti su višestruko manje nego na modelu sa nerezilijentnim abatmentom., Introduction Differences between the tooth and implant response to load can lead to many biological and technical implications in the conditions of occlusal forces. Objective The objective of this study was to analyze load distribution in tooth/implant-supported fixed partial dentures with the use of resilient TSA (Titan Shock Absorber, BoneCare GmbH, Augsburg, Germany) abutment and conventional non-resilient abutment using finite element method. Methods This study presents two basic 3D models. For one model a standard non-resilient abutment is used, and on the implant of the second model a resilient TSA abutment is applied. The virtual model contains drawn contours of tooth, mucous membranes, implant, cortical bones and spongiosa, abutment and suprastructure. The experiment used 500 N of vertical force, applied in three different cases of axial load. Calculations of von Mises equivalent stresses of the tooth root and periodontium, implants and peri-implant tissue were made. Results For the model to which a non-resilient abutment is applied, maximum stress values in all three cases are observed in the cortical part of the bone (maximum stress value of 49.7 MPa). Measurements of stress and deformation in the bone tissue in the model with application of the resilient TSA abutment demonstrated similar distribution; however, these values are many times lower than in the model with non-resilient TSA abutment (maximum stress value of 28.9 MPa). Conclusion Application of the resilient TSA abutment results in more equal distribution of stress and deformations in the bone tissue under vertical forces. These values are many times lower than in the model with the non-resilient abutment.",
publisher = "Srpsko lekarsko društvo, Beograd",
journal = "Srpski Arhiv Za Celokupno Lekarstvo",
title = "Analiza distribucije opterećenja kod mešovito nošenih mostova primenom rezilijentnih abatmenata, Analysis of load distribution in tooth-implant supported fixed partial dentures by the use of resilient abutment",
pages = "195-188",
number = "3-4",
volume = "144",
doi = "10.2298/SARH1604188G"
}

Glišić, M., Stamenković, D., Grbović, A., Todorović, A., Marković, A.,& Trifković, B.. (2016). Analiza distribucije opterećenja kod mešovito nošenih mostova primenom rezilijentnih abatmenata. in Srpski Arhiv Za Celokupno Lekarstvo
Srpsko lekarsko društvo, Beograd., 144(3-4), 188-195.
https://doi.org/10.2298/SARH1604188G

Glišić M, Stamenković D, Grbović A, Todorović A, Marković A, Trifković B. Analiza distribucije opterećenja kod mešovito nošenih mostova primenom rezilijentnih abatmenata. in Srpski Arhiv Za Celokupno Lekarstvo. 2016;144(3-4):188-195.
doi:10.2298/SARH1604188G .

Glišić, Mirko, Stamenković, Dragoslav, Grbović, Aleksandar, Todorović, Aleksandar, Marković, Aleksa, Trifković, Branka, "Analiza distribucije opterećenja kod mešovito nošenih mostova primenom rezilijentnih abatmenata" in Srpski Arhiv Za Celokupno Lekarstvo, 144, no. 3-4 (2016):188-195,
https://doi.org/10.2298/SARH1604188G . .

TY  - JOUR
AU  - Patrnogić, Vesna
AU  - Todorović, Aleksandar
AU  - Šćepanović, Miodrag
AU  - Radović, Katarina
AU  - Vesnić, Jelena
AU  - Grbović, Aleksandar
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1731
AB  - Uvod/Cilj. U terapiji jednostrano slobodnog sedla koriste se različiti oblici zubnih nadoknada. Jednostrana kompleksna parcijalna proteza (JKPP) jedna je od indikacija za bezubost klase Kenedi II. Odsustvo velike spojnice i protezne ploče predstavlja prednost u odnosu na konvencionalne nadoknade zbog boljeg komfora i kraćeg perioda adaptacije. Cilj rada bio je analiza uticaja promene dužine slobodnog sedla na ponašanje potpornih struktura JKPP. Metode. Ispitivani su naponi očnjaka i prvog premolara kao retencionih zuba i veze (spoja) pod dejstvom fizioloških sila sa pomeranjem tačke opterećenja distalno, u zavisnosti od dužine sedla. Primenom kompjuterskog programa CATIA u realnoj veličini urađen je virtulni 3D model fiksnog dela nadoknade (očnjak i prvi premolar sa namenskim krunama) koji je veza SD snap in latch priključena na mobilni deo parcijalne proteze. Mobilni deo nadoknade postavljen je u predelu dva, tri, odnosno četiri bočna zuba (drugi premolar, prvi, drugi i treći molar). Primenom metode konačnih elemenata obavljena je analiza naponskih stanja pri opterećenju fiziološkim silama od 150 N u predelu zuba slobodnog sedla. Rezultati. Analiza proračuna pokazala je da pod dejstvom fizioloških sila dolazi do različite raspodele napona na retencione zube i spoj u zavisnosti od dužine sedla. Zaključak. Dobijene vrednosti za napone kako na retencionim zubima, tako i na spoju, daleko su manje od graničnih. Pri zadatim naponima dolazi do promene ponašanja, ali ne i do plastične deformacije sistema.
AB  - Background/Aim. Different types of dental restorations are used for the therapy of unilateral free-end saddle edentulism. Unilateral complex partial denture is one of the indications for the Kennedy class II partial edentulism. The abscence of major connector and denture plate is an advantage compared to the conventional restorations, because of better comfort and shorter period of adaptation. The aim of the study was to analyse the influence of free-end saddle length change on the behaviour of unilateral complex partial denture supporting structures. Methods. Stress levels of the canine and the first premolar as retentional teeth and the attachments were tested under the influence of physiological forces with the loading point shifting distally in relation to the saddle length change. A virtual real size 3D model of the fixed part of the restoration (the canine and the first premolar with milled crowns) was created using the CATIA computer program. It was connected to the mobile part of partial denture with the SD snap in latch attachment. Mobile part of the restoration was designed in the region of 2, 3 and 4 lateral teeth (second premolar, first, second and third molar). By using the finite element method (FEM) stress levels analysis was performed under the load of physiological forces of 150 N in the free-end saddle teeth zone. Results. The results of analysis show that physiological forces cause a different stress distribution on the abutment teeth and the attachment, depending on the saddle length. Conclusion. The stress level values obtained for the abutment teeth as well as the attachment are far lower than the marginal ones. The behaviour of the system changes under this defined stress, but no plastic deformation occurs.
PB  - Vojnomedicinska akademija - Institut za naučne informacije, Beograd
T2  - Vojnosanitetski Pregled
T1  - Uticaj promene dužine slobodnog sedla na promenu napona retencionih zuba i spoja jednostrane kompleksne parcijalne proteze
T1  - Free-end saddle length influence on stress level in unilateral complex partial denture abutment teeth and retention elements
EP  - 1022
IS  - 11
SP  - 1015
VL  - 70
DO  - 10.2298/VSP110603028P
ER  - 

@article{
author = "Patrnogić, Vesna and Todorović, Aleksandar and Šćepanović, Miodrag and Radović, Katarina and Vesnić, Jelena and Grbović, Aleksandar",
year = "2013",
abstract = "Uvod/Cilj. U terapiji jednostrano slobodnog sedla koriste se različiti oblici zubnih nadoknada. Jednostrana kompleksna parcijalna proteza (JKPP) jedna je od indikacija za bezubost klase Kenedi II. Odsustvo velike spojnice i protezne ploče predstavlja prednost u odnosu na konvencionalne nadoknade zbog boljeg komfora i kraćeg perioda adaptacije. Cilj rada bio je analiza uticaja promene dužine slobodnog sedla na ponašanje potpornih struktura JKPP. Metode. Ispitivani su naponi očnjaka i prvog premolara kao retencionih zuba i veze (spoja) pod dejstvom fizioloških sila sa pomeranjem tačke opterećenja distalno, u zavisnosti od dužine sedla. Primenom kompjuterskog programa CATIA u realnoj veličini urađen je virtulni 3D model fiksnog dela nadoknade (očnjak i prvi premolar sa namenskim krunama) koji je veza SD snap in latch priključena na mobilni deo parcijalne proteze. Mobilni deo nadoknade postavljen je u predelu dva, tri, odnosno četiri bočna zuba (drugi premolar, prvi, drugi i treći molar). Primenom metode konačnih elemenata obavljena je analiza naponskih stanja pri opterećenju fiziološkim silama od 150 N u predelu zuba slobodnog sedla. Rezultati. Analiza proračuna pokazala je da pod dejstvom fizioloških sila dolazi do različite raspodele napona na retencione zube i spoj u zavisnosti od dužine sedla. Zaključak. Dobijene vrednosti za napone kako na retencionim zubima, tako i na spoju, daleko su manje od graničnih. Pri zadatim naponima dolazi do promene ponašanja, ali ne i do plastične deformacije sistema., Background/Aim. Different types of dental restorations are used for the therapy of unilateral free-end saddle edentulism. Unilateral complex partial denture is one of the indications for the Kennedy class II partial edentulism. The abscence of major connector and denture plate is an advantage compared to the conventional restorations, because of better comfort and shorter period of adaptation. The aim of the study was to analyse the influence of free-end saddle length change on the behaviour of unilateral complex partial denture supporting structures. Methods. Stress levels of the canine and the first premolar as retentional teeth and the attachments were tested under the influence of physiological forces with the loading point shifting distally in relation to the saddle length change. A virtual real size 3D model of the fixed part of the restoration (the canine and the first premolar with milled crowns) was created using the CATIA computer program. It was connected to the mobile part of partial denture with the SD snap in latch attachment. Mobile part of the restoration was designed in the region of 2, 3 and 4 lateral teeth (second premolar, first, second and third molar). By using the finite element method (FEM) stress levels analysis was performed under the load of physiological forces of 150 N in the free-end saddle teeth zone. Results. The results of analysis show that physiological forces cause a different stress distribution on the abutment teeth and the attachment, depending on the saddle length. Conclusion. The stress level values obtained for the abutment teeth as well as the attachment are far lower than the marginal ones. The behaviour of the system changes under this defined stress, but no plastic deformation occurs.",
publisher = "Vojnomedicinska akademija - Institut za naučne informacije, Beograd",
journal = "Vojnosanitetski Pregled",
title = "Uticaj promene dužine slobodnog sedla na promenu napona retencionih zuba i spoja jednostrane kompleksne parcijalne proteze, Free-end saddle length influence on stress level in unilateral complex partial denture abutment teeth and retention elements",
pages = "1022-1015",
number = "11",
volume = "70",
doi = "10.2298/VSP110603028P"
}

Patrnogić, V., Todorović, A., Šćepanović, M., Radović, K., Vesnić, J.,& Grbović, A.. (2013). Uticaj promene dužine slobodnog sedla na promenu napona retencionih zuba i spoja jednostrane kompleksne parcijalne proteze. in Vojnosanitetski Pregled
Vojnomedicinska akademija - Institut za naučne informacije, Beograd., 70(11), 1015-1022.
https://doi.org/10.2298/VSP110603028P

Patrnogić V, Todorović A, Šćepanović M, Radović K, Vesnić J, Grbović A. Uticaj promene dužine slobodnog sedla na promenu napona retencionih zuba i spoja jednostrane kompleksne parcijalne proteze. in Vojnosanitetski Pregled. 2013;70(11):1015-1022.
doi:10.2298/VSP110603028P .

Patrnogić, Vesna, Todorović, Aleksandar, Šćepanović, Miodrag, Radović, Katarina, Vesnić, Jelena, Grbović, Aleksandar, "Uticaj promene dužine slobodnog sedla na promenu napona retencionih zuba i spoja jednostrane kompleksne parcijalne proteze" in Vojnosanitetski Pregled, 70, no. 11 (2013):1015-1022,
https://doi.org/10.2298/VSP110603028P . .

TY  - JOUR
AU  - Šćepanović, Miodrag
AU  - Tihaček-Šojić, Ljiljana
AU  - Tasić, Milan
AU  - Mitrović, Radivoje
AU  - Todorović, Aleksandar
AU  - Trifković, Branka
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1718
AB  - Uvod/Cilj. Retenciona sila parcijalne skeletirane proteze (PSP) direktno zavisi od elastične sile rastegnute kukice. Da bi uspešno obavile svoju ulogu, retencione ručice kukice (RRK) prilikom defleksije moraju imati što ravnomerniju raspodelu napona. Stepen sigurnosti je pojam koji se može primeniti u proceni trajnosti i funkcionalnosti RRK. Ciljevi ove studije bili su analiziranje svojstava kukica koje su urađene pomoću konvencionalnih voštanih profila za izradu RRK, kao i definisanje optimalnih oblika RRK sa aspekta raspodele napona i stepena sigurnosti. Metode. Analizirani su CAD (computer aided design) modeli RRK kojima su simulirana svojstva gradivnih materijala koji se koriste za izradu legura: CoCrMo, komercijalno čist titan (CPTi) i poliacetal. Rezultati. Rezultati su pokazali da je geometrija Rapid-flex profila, korišćenih u okviru BIOS, definisana za projektovanje i modeliranje RRK koje se izrađuju od legure (CoCrMo). I Bar i Bonihard kukice od CPTi mogu se uraditi po istom konceptu kao i legure CoCrMo sa aspekta stepena sigurnosti, međutim, titanijumske kukice bile su znatno elastičnije i stoga su morale biti masivnije. Kukice od poliacetala ne smeju se modelovati po BIOS konceptu za leguru Co-CrMo. Dokaz za to je vrlo mali stepen sigurnosti. Zaključak. BIOS koncept može da se koristiti samo za RRK koje se izrađuju od legure CoCrMo. Za izradu kukica od ostalih ispitivanih materijala neophodni su drugačiji voštani profili. Doprinos studije predstavlja i poboljšavanje postojećih sistema za definisanje oblika RRK izrađenih od legura CoCrMo. Značajnija primena rezultata je i mogućnost stvaranja novih sistema za definisanje oblika RRK od CPTi i poliacetala.
AB  - Bacground/Aim. Retentive force of removable partial denture (RPD) directly depends on elastic force of stretched retentive clasp arms (RCAs). During deflection RCA must have even stress distribution. Safety factor is the concept which can be applied in estimating durability and functionality of RCAs. This study was based on analyzing properties of clasps designed by conventional clasp wax profiles and defining the optimal shapes of RCAs for stress distribution and safety factor aspects. Methods. Computer-aided-design (CAD) models of RCAs with simulated properties of materials used for fabrication of RPD cobalt-chromium-molybdenum (CoCrMo) alloy, commercially pure titanium (CPTi) and polyacetale were analyzed. Results. The research showed that geometrics of Rapidflex profiles from the BIOS concept are defined for designing and modeling RCAs from CoCrMo alloys. I-Bar and Bonihard clasps made from CPTi might have the same design as Co- CrMo clasp only by safety factor aspect, but it is obvious that CPTi are much more flexible, so their shape must be more massive. Polyacetale clasps should not be fabricated by BIOS concept for CoCrMo alloy. A proof for that is the low value of safety factor. Conclusion. The BIOS concept should be used only for RCAs made of CoCrMo alloy and different wax profiles should be used for fabricating clasps of other investigated materials. The contribution of this study may be the improvement of present systems for defining the clasps shapes made from CoCrMo alloys. The more significant application is the possibility of creating new concepts in defining shapes of RCA made from CPTi and polyacetale.
PB  - Vojnomedicinska akademija - Institut za naučne informacije, Beograd
T2  - Vojnosanitetski Pregled
T1  - Definisanje optimalnog oblika i faktora sigurnosti retencionih ručica kukica parcijalnih skeletiranih proteza metodom konačnih elemenata
T1  - Finite element analysis in defining the optimal shape and safety factor of retentive clasp arms of a removable partial denture
EP  - 1005
IS  - 11
SP  - 999
VL  - 70
DO  - 10.2298/VSP110526021S
ER  - 

@article{
author = "Šćepanović, Miodrag and Tihaček-Šojić, Ljiljana and Tasić, Milan and Mitrović, Radivoje and Todorović, Aleksandar and Trifković, Branka",
year = "2013",
abstract = "Uvod/Cilj. Retenciona sila parcijalne skeletirane proteze (PSP) direktno zavisi od elastične sile rastegnute kukice. Da bi uspešno obavile svoju ulogu, retencione ručice kukice (RRK) prilikom defleksije moraju imati što ravnomerniju raspodelu napona. Stepen sigurnosti je pojam koji se može primeniti u proceni trajnosti i funkcionalnosti RRK. Ciljevi ove studije bili su analiziranje svojstava kukica koje su urađene pomoću konvencionalnih voštanih profila za izradu RRK, kao i definisanje optimalnih oblika RRK sa aspekta raspodele napona i stepena sigurnosti. Metode. Analizirani su CAD (computer aided design) modeli RRK kojima su simulirana svojstva gradivnih materijala koji se koriste za izradu legura: CoCrMo, komercijalno čist titan (CPTi) i poliacetal. Rezultati. Rezultati su pokazali da je geometrija Rapid-flex profila, korišćenih u okviru BIOS, definisana za projektovanje i modeliranje RRK koje se izrađuju od legure (CoCrMo). I Bar i Bonihard kukice od CPTi mogu se uraditi po istom konceptu kao i legure CoCrMo sa aspekta stepena sigurnosti, međutim, titanijumske kukice bile su znatno elastičnije i stoga su morale biti masivnije. Kukice od poliacetala ne smeju se modelovati po BIOS konceptu za leguru Co-CrMo. Dokaz za to je vrlo mali stepen sigurnosti. Zaključak. BIOS koncept može da se koristiti samo za RRK koje se izrađuju od legure CoCrMo. Za izradu kukica od ostalih ispitivanih materijala neophodni su drugačiji voštani profili. Doprinos studije predstavlja i poboljšavanje postojećih sistema za definisanje oblika RRK izrađenih od legura CoCrMo. Značajnija primena rezultata je i mogućnost stvaranja novih sistema za definisanje oblika RRK od CPTi i poliacetala., Bacground/Aim. Retentive force of removable partial denture (RPD) directly depends on elastic force of stretched retentive clasp arms (RCAs). During deflection RCA must have even stress distribution. Safety factor is the concept which can be applied in estimating durability and functionality of RCAs. This study was based on analyzing properties of clasps designed by conventional clasp wax profiles and defining the optimal shapes of RCAs for stress distribution and safety factor aspects. Methods. Computer-aided-design (CAD) models of RCAs with simulated properties of materials used for fabrication of RPD cobalt-chromium-molybdenum (CoCrMo) alloy, commercially pure titanium (CPTi) and polyacetale were analyzed. Results. The research showed that geometrics of Rapidflex profiles from the BIOS concept are defined for designing and modeling RCAs from CoCrMo alloys. I-Bar and Bonihard clasps made from CPTi might have the same design as Co- CrMo clasp only by safety factor aspect, but it is obvious that CPTi are much more flexible, so their shape must be more massive. Polyacetale clasps should not be fabricated by BIOS concept for CoCrMo alloy. A proof for that is the low value of safety factor. Conclusion. The BIOS concept should be used only for RCAs made of CoCrMo alloy and different wax profiles should be used for fabricating clasps of other investigated materials. The contribution of this study may be the improvement of present systems for defining the clasps shapes made from CoCrMo alloys. The more significant application is the possibility of creating new concepts in defining shapes of RCA made from CPTi and polyacetale.",
publisher = "Vojnomedicinska akademija - Institut za naučne informacije, Beograd",
journal = "Vojnosanitetski Pregled",
title = "Definisanje optimalnog oblika i faktora sigurnosti retencionih ručica kukica parcijalnih skeletiranih proteza metodom konačnih elemenata, Finite element analysis in defining the optimal shape and safety factor of retentive clasp arms of a removable partial denture",
pages = "1005-999",
number = "11",
volume = "70",
doi = "10.2298/VSP110526021S"
}

Šćepanović, M., Tihaček-Šojić, L., Tasić, M., Mitrović, R., Todorović, A.,& Trifković, B.. (2013). Definisanje optimalnog oblika i faktora sigurnosti retencionih ručica kukica parcijalnih skeletiranih proteza metodom konačnih elemenata. in Vojnosanitetski Pregled
Vojnomedicinska akademija - Institut za naučne informacije, Beograd., 70(11), 999-1005.
https://doi.org/10.2298/VSP110526021S

Šćepanović M, Tihaček-Šojić L, Tasić M, Mitrović R, Todorović A, Trifković B. Definisanje optimalnog oblika i faktora sigurnosti retencionih ručica kukica parcijalnih skeletiranih proteza metodom konačnih elemenata. in Vojnosanitetski Pregled. 2013;70(11):999-1005.
doi:10.2298/VSP110526021S .

Šćepanović, Miodrag, Tihaček-Šojić, Ljiljana, Tasić, Milan, Mitrović, Radivoje, Todorović, Aleksandar, Trifković, Branka, "Definisanje optimalnog oblika i faktora sigurnosti retencionih ručica kukica parcijalnih skeletiranih proteza metodom konačnih elemenata" in Vojnosanitetski Pregled, 70, no. 11 (2013):999-1005,
https://doi.org/10.2298/VSP110526021S . .

TY  - JOUR
AU  - Todorović, Aleksandar
AU  - Radović, Katarina
AU  - Grbović, Aleksandar
AU  - Rudolf, Rebeka
AU  - Maksimović, Ivana
AU  - Stamenković, Dragoslav
PY  - 2010
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1023
AB  - Different types of dental restorations are used in the treatment Of a unilateral, free-end saddle. A unilateral, complex, Partial denture is one of (lie indications for this case of partial edentulousness. Consequently, the aim Of this Study was to stress test the unilateral complex partial denture model and its parts, under load, when changing the length of thee free-end saddle. The stress distribution in canines and the first premolar, as the retention teeth. was examined under the influence of physiological and excessive occlusal forces by moving the point of attack in a distal direction. CATIA software was used for the creation of the 3D. Fixed restoration unit model, in real size, with the appropriate Supporting structures (canine and first premolar with present crowns, alveola. periodontal space) that are connected by the SD snap-in-latch attachment to the mobile portion of a partial denture. The mobile portion consists of in acrylate-coated metal base with three teeth (second premolar, first and second molars). The stress analysis, using the finite-element method, was performed Under the application of physiological loads of 25 N, 50 N. 75 N and 100 N, and excessive loads of 300 N, 500 N and 700 N in the second premolar region, as well as in the first and second molar region. The results of the analysis showed that the largest amount Of load under the application of physiological occlusal forces is positioned on the abutment teeth. Excessive forces are borne by the attachment. The stress analysis, performed on the unilateral complex partial denture model. Suggested that the obtained stress values are lower than the limit values at which the plastic deformation in the model occurs.
PB  - Institute of Metals and Technology
T2  - Materiali in Tehnologije
T1  - Stress analysis of a unilateral complex partial denture using the finite-element method
EP  - 47
IS  - 1
SP  - 41
VL  - 44
UR  - https://hdl.handle.net/21.15107/rcub_machinery_1023
ER  - 

@article{
author = "Todorović, Aleksandar and Radović, Katarina and Grbović, Aleksandar and Rudolf, Rebeka and Maksimović, Ivana and Stamenković, Dragoslav",
year = "2010",
abstract = "Different types of dental restorations are used in the treatment Of a unilateral, free-end saddle. A unilateral, complex, Partial denture is one of (lie indications for this case of partial edentulousness. Consequently, the aim Of this Study was to stress test the unilateral complex partial denture model and its parts, under load, when changing the length of thee free-end saddle. The stress distribution in canines and the first premolar, as the retention teeth. was examined under the influence of physiological and excessive occlusal forces by moving the point of attack in a distal direction. CATIA software was used for the creation of the 3D. Fixed restoration unit model, in real size, with the appropriate Supporting structures (canine and first premolar with present crowns, alveola. periodontal space) that are connected by the SD snap-in-latch attachment to the mobile portion of a partial denture. The mobile portion consists of in acrylate-coated metal base with three teeth (second premolar, first and second molars). The stress analysis, using the finite-element method, was performed Under the application of physiological loads of 25 N, 50 N. 75 N and 100 N, and excessive loads of 300 N, 500 N and 700 N in the second premolar region, as well as in the first and second molar region. The results of the analysis showed that the largest amount Of load under the application of physiological occlusal forces is positioned on the abutment teeth. Excessive forces are borne by the attachment. The stress analysis, performed on the unilateral complex partial denture model. Suggested that the obtained stress values are lower than the limit values at which the plastic deformation in the model occurs.",
publisher = "Institute of Metals and Technology",
journal = "Materiali in Tehnologije",
title = "Stress analysis of a unilateral complex partial denture using the finite-element method",
pages = "47-41",
number = "1",
volume = "44",
url = "https://hdl.handle.net/21.15107/rcub_machinery_1023"
}

Todorović, A., Radović, K., Grbović, A., Rudolf, R., Maksimović, I.,& Stamenković, D.. (2010). Stress analysis of a unilateral complex partial denture using the finite-element method. in Materiali in Tehnologije
Institute of Metals and Technology., 44(1), 41-47.
https://hdl.handle.net/21.15107/rcub_machinery_1023

Todorović A, Radović K, Grbović A, Rudolf R, Maksimović I, Stamenković D. Stress analysis of a unilateral complex partial denture using the finite-element method. in Materiali in Tehnologije. 2010;44(1):41-47.
https://hdl.handle.net/21.15107/rcub_machinery_1023 .

Todorović, Aleksandar, Radović, Katarina, Grbović, Aleksandar, Rudolf, Rebeka, Maksimović, Ivana, Stamenković, Dragoslav, "Stress analysis of a unilateral complex partial denture using the finite-element method" in Materiali in Tehnologije, 44, no. 1 (2010):41-47,
https://hdl.handle.net/21.15107/rcub_machinery_1023 .

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 . .