Development and application of methods and laboratory equipment intended for conformity assessment of technical products

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Development and application of methods and laboratory equipment intended for conformity assessment of technical products (en)
Развој и примена метода и лабораторијске опреме за оцењивање усаглашености техничких производа (sr)
Razvoj i primena metoda i laboratorijske opreme za ocenjivanje usaglašenosti tehničkih proizvoda (sr_RS)
Authors

Publications

Experimental analysis of dental-implant load transfer in polymethyl-methacrylate blocks

Šarac, Dušan; Mitrović, Nenad; Tanasić, Ivan; Misković, Žarko; Tihaček-Šojić, Ljiljana

(Inst Za Kovinske Materiale I In Tehnologie, Ljubjana, 2019)

TY  - JOUR
AU  - Šarac, Dušan
AU  - Mitrović, Nenad
AU  - Tanasić, Ivan
AU  - Misković, Žarko
AU  - Tihaček-Šojić, Ljiljana
PY  - 2019
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/2450
AB  - Dental-implant overload can cause bone resorption. Load-transfer characteristics of dental implants are affected by their macro-design parameters. The goal of this study was to experimentally analyse the load-transfer characteristics of different dental implants, using polymethyl-methacrylate blocks. Three polymethyl-methacrylate blocks were created, with dimensions of (68 x 25 x 9) mm. Three dental implants, Nobel empty set3.5 mm x 15 mm, Strauman empty set4.1 mm x 10 mm and Strauman empty set4.8 mm x 12 mm. were placed in separate blocks. The samples were supported by a three-point-bending set-up and loaded with an axial force of 600 N. The 3D digital image correlation method was employed for strain and displacement measurements. The highest displacement and von Mises strain values were found for Strauman empty set4.1 mm x 10 mm (p  lt  0.05), 0.186 mm and 0.596 %, respectively. The sample of Nobel empty set3.5 mm x 15 mm showed the lowest strain values. The sample of Strauman empty set4.8 mm x 12 mm (p > 0.05) had similar strain values as Nobel empty set3.5 mm x 15 mm. The load transfer during axial loading was primarily affected by the size of the implant contact surface. The displacement and strain values in the implant vicinity may provide an insight into the effect of dental-implant design on the load transfer.
PB  - Inst Za Kovinske Materiale I In Tehnologie, Ljubjana
T2  - Materiali in Tehnologije
T1  - Experimental analysis of dental-implant load transfer in polymethyl-methacrylate blocks
VL  - 53
IS  - 1
SP  - 133
EP  - 137
DO  - 10.17222/mit.2018.081
ER  - 
@article{
author = "Šarac, Dušan and Mitrović, Nenad and Tanasić, Ivan and Misković, Žarko and Tihaček-Šojić, Ljiljana",
year = "2019",
abstract = "Dental-implant overload can cause bone resorption. Load-transfer characteristics of dental implants are affected by their macro-design parameters. The goal of this study was to experimentally analyse the load-transfer characteristics of different dental implants, using polymethyl-methacrylate blocks. Three polymethyl-methacrylate blocks were created, with dimensions of (68 x 25 x 9) mm. Three dental implants, Nobel empty set3.5 mm x 15 mm, Strauman empty set4.1 mm x 10 mm and Strauman empty set4.8 mm x 12 mm. were placed in separate blocks. The samples were supported by a three-point-bending set-up and loaded with an axial force of 600 N. The 3D digital image correlation method was employed for strain and displacement measurements. The highest displacement and von Mises strain values were found for Strauman empty set4.1 mm x 10 mm (p  lt  0.05), 0.186 mm and 0.596 %, respectively. The sample of Nobel empty set3.5 mm x 15 mm showed the lowest strain values. The sample of Strauman empty set4.8 mm x 12 mm (p > 0.05) had similar strain values as Nobel empty set3.5 mm x 15 mm. The load transfer during axial loading was primarily affected by the size of the implant contact surface. The displacement and strain values in the implant vicinity may provide an insight into the effect of dental-implant design on the load transfer.",
publisher = "Inst Za Kovinske Materiale I In Tehnologie, Ljubjana",
journal = "Materiali in Tehnologije",
title = "Experimental analysis of dental-implant load transfer in polymethyl-methacrylate blocks",
volume = "53",
number = "1",
pages = "133-137",
doi = "10.17222/mit.2018.081"
}
Šarac, D., Mitrović, N., Tanasić, I., Misković, Ž.,& Tihaček-Šojić, L.. (2019). Experimental analysis of dental-implant load transfer in polymethyl-methacrylate blocks. in Materiali in Tehnologije
Inst Za Kovinske Materiale I In Tehnologie, Ljubjana., 53(1), 133-137.
https://doi.org/10.17222/mit.2018.081
Šarac D, Mitrović N, Tanasić I, Misković Ž, Tihaček-Šojić L. Experimental analysis of dental-implant load transfer in polymethyl-methacrylate blocks. in Materiali in Tehnologije. 2019;53(1):133-137.
doi:10.17222/mit.2018.081 .
Šarac, Dušan, Mitrović, Nenad, Tanasić, Ivan, Misković, Žarko, Tihaček-Šojić, Ljiljana, "Experimental analysis of dental-implant load transfer in polymethyl-methacrylate blocks" in Materiali in Tehnologije, 53, no. 1 (2019):133-137,
https://doi.org/10.17222/mit.2018.081 . .
2
2

3D Digital Image Correlation Analysis of the Shrinkage Strain in Four Dual Cure Composite Cements

Mitrović, Aleksandra; Antonović, Dušan; Tanasić, Ivan; Mitrović, Nenad; Bakić, Gordana; Popović, Dejana; Milošević, Miloš

(Hindawi Ltd, London, 2019)

TY  - JOUR
AU  - Mitrović, Aleksandra
AU  - Antonović, Dušan
AU  - Tanasić, Ivan
AU  - Mitrović, Nenad
AU  - Bakić, Gordana
AU  - Popović, Dejana
AU  - Milošević, Miloš
PY  - 2019
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/2420
AB  - The introduction of resin-based cements and an adhesive-bonding system in daily dental practice has given the opportunity to increase the retention of previously conventional cemented restorations and the optimal results in esthetic. This experimental study employed the 3D Digital Image Correlation Method (3D-DIC) for detecting shrinkage strain in four dual cured composite cements. The aim was to visualize measure, analyze, and compare strain fields in four resin-based cements using the 3D-DIC method. A total of 72 samples were divided into 4 groups considering variations in sample types, diameter, and thickness. Four types of composite cements: RelyX U200 (3 M ESPE, St. Paul, MN, USA), MaxCem Elite (Kerr, Orange, CA, USA), Multilink Automix (Ivoclar Vivadent, Schaan, Liechtenstein), and SeT PP (SDI, Australia) were used. Each type had diameters of 3 mm, 4 mm, and 5 mm, respectively, combined with two different values of thickness: 1 mm and 2 mm. Thickness had an important role on strain detected in all tested materials showing higher strain in samples with 2 mm thickness compared to 1 mm samples. Shrinkage strain values were the highest in Set PP samples indicated the possibility of undesirable de-bonding.
PB  - Hindawi Ltd, London
T2  - Biomed Research International
T1  - 3D Digital Image Correlation Analysis of the Shrinkage Strain in Four Dual Cure Composite Cements
VL  - 2019
DO  - 10.1155/2019/2041348
ER  - 
@article{
author = "Mitrović, Aleksandra and Antonović, Dušan and Tanasić, Ivan and Mitrović, Nenad and Bakić, Gordana and Popović, Dejana and Milošević, Miloš",
year = "2019",
abstract = "The introduction of resin-based cements and an adhesive-bonding system in daily dental practice has given the opportunity to increase the retention of previously conventional cemented restorations and the optimal results in esthetic. This experimental study employed the 3D Digital Image Correlation Method (3D-DIC) for detecting shrinkage strain in four dual cured composite cements. The aim was to visualize measure, analyze, and compare strain fields in four resin-based cements using the 3D-DIC method. A total of 72 samples were divided into 4 groups considering variations in sample types, diameter, and thickness. Four types of composite cements: RelyX U200 (3 M ESPE, St. Paul, MN, USA), MaxCem Elite (Kerr, Orange, CA, USA), Multilink Automix (Ivoclar Vivadent, Schaan, Liechtenstein), and SeT PP (SDI, Australia) were used. Each type had diameters of 3 mm, 4 mm, and 5 mm, respectively, combined with two different values of thickness: 1 mm and 2 mm. Thickness had an important role on strain detected in all tested materials showing higher strain in samples with 2 mm thickness compared to 1 mm samples. Shrinkage strain values were the highest in Set PP samples indicated the possibility of undesirable de-bonding.",
publisher = "Hindawi Ltd, London",
journal = "Biomed Research International",
title = "3D Digital Image Correlation Analysis of the Shrinkage Strain in Four Dual Cure Composite Cements",
volume = "2019",
doi = "10.1155/2019/2041348"
}
Mitrović, A., Antonović, D., Tanasić, I., Mitrović, N., Bakić, G., Popović, D.,& Milošević, M.. (2019). 3D Digital Image Correlation Analysis of the Shrinkage Strain in Four Dual Cure Composite Cements. in Biomed Research International
Hindawi Ltd, London., 2019.
https://doi.org/10.1155/2019/2041348
Mitrović A, Antonović D, Tanasić I, Mitrović N, Bakić G, Popović D, Milošević M. 3D Digital Image Correlation Analysis of the Shrinkage Strain in Four Dual Cure Composite Cements. in Biomed Research International. 2019;2019.
doi:10.1155/2019/2041348 .
Mitrović, Aleksandra, Antonović, Dušan, Tanasić, Ivan, Mitrović, Nenad, Bakić, Gordana, Popović, Dejana, Milošević, Miloš, "3D Digital Image Correlation Analysis of the Shrinkage Strain in Four Dual Cure Composite Cements" in Biomed Research International, 2019 (2019),
https://doi.org/10.1155/2019/2041348 . .
6
2
6

Strain field measurements of glass ionomer cement

Mitrović, Aleksandra; Mitrović, Nenad; Tanasić, Ivan; Milošević, Miloš; Antonović, Dušan

(Institut za ispitivanje materijala, Beograd, 2019)

TY  - JOUR
AU  - Mitrović, Aleksandra
AU  - Mitrović, Nenad
AU  - Tanasić, Ivan
AU  - Milošević, Miloš
AU  - Antonović, Dušan
PY  - 2019
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/2399
AB  - Extensive evolution of glass ionomer cements (GIC) has marked a significant shift in the practice of luting indirect dental restorations limiting the use of zinc-phosphate and zinc-polycarboxylate cements to a few indications. GIC are now one of the materials of choice for cementation of all ceramics, fiber reinforced composite posts and veneers. GICs are determined by unique properties like chemical adhesion to tooth and base metals, low thermal expansion coefficients similar to dentin and minimal microleakage at the tooth-enamel interface due to low shrinkage. Shrinkage strain is identified as the cause, and the associated stress as the mechanism for the loss of marginal adaption and cohesive fracture within the material. The aim of this study is to measure the strain and displacement field in a conventional GIC (Riva Luting, SDI, Australia) related to different cement diameter, using 3D Digital Image Correlation (DIC) method. The experiment is done for samples with thickness of 1 mm combined with diameters of 4 mm (Group I) and 3 mm (Group II). The strain field is measured using 3D 11optical system Aramis 2M (GOM, Braunschweig, Germany). This study provides valuable data about strain behaviour and displacement as a possible failure factor in GIC, Riva Luting. Visible differences between Group I and Group II were observed.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Structural Integrity & Life
T1  - Strain field measurements of glass ionomer cement
VL  - 19
IS  - 2
SP  - 143
EP  - 147
UR  - https://hdl.handle.net/21.15107/rcub_smile_2399
ER  - 
@article{
author = "Mitrović, Aleksandra and Mitrović, Nenad and Tanasić, Ivan and Milošević, Miloš and Antonović, Dušan",
year = "2019",
abstract = "Extensive evolution of glass ionomer cements (GIC) has marked a significant shift in the practice of luting indirect dental restorations limiting the use of zinc-phosphate and zinc-polycarboxylate cements to a few indications. GIC are now one of the materials of choice for cementation of all ceramics, fiber reinforced composite posts and veneers. GICs are determined by unique properties like chemical adhesion to tooth and base metals, low thermal expansion coefficients similar to dentin and minimal microleakage at the tooth-enamel interface due to low shrinkage. Shrinkage strain is identified as the cause, and the associated stress as the mechanism for the loss of marginal adaption and cohesive fracture within the material. The aim of this study is to measure the strain and displacement field in a conventional GIC (Riva Luting, SDI, Australia) related to different cement diameter, using 3D Digital Image Correlation (DIC) method. The experiment is done for samples with thickness of 1 mm combined with diameters of 4 mm (Group I) and 3 mm (Group II). The strain field is measured using 3D 11optical system Aramis 2M (GOM, Braunschweig, Germany). This study provides valuable data about strain behaviour and displacement as a possible failure factor in GIC, Riva Luting. Visible differences between Group I and Group II were observed.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity & Life",
title = "Strain field measurements of glass ionomer cement",
volume = "19",
number = "2",
pages = "143-147",
url = "https://hdl.handle.net/21.15107/rcub_smile_2399"
}
Mitrović, A., Mitrović, N., Tanasić, I., Milošević, M.,& Antonović, D.. (2019). Strain field measurements of glass ionomer cement. in Structural Integrity & Life
Institut za ispitivanje materijala, Beograd., 19(2), 143-147.
https://hdl.handle.net/21.15107/rcub_smile_2399
Mitrović A, Mitrović N, Tanasić I, Milošević M, Antonović D. Strain field measurements of glass ionomer cement. in Structural Integrity & Life. 2019;19(2):143-147.
https://hdl.handle.net/21.15107/rcub_smile_2399 .
Mitrović, Aleksandra, Mitrović, Nenad, Tanasić, Ivan, Milošević, Miloš, Antonović, Dušan, "Strain field measurements of glass ionomer cement" in Structural Integrity & Life, 19, no. 2 (2019):143-147,
https://hdl.handle.net/21.15107/rcub_smile_2399 .
1
4

Analysis of the strain and hardness in self-cured and light-cured self-adhesive resin based cement

Mitrović, Aleksandra; Tanasić, Ivan; Mitrović, Nenad; Miletić, Vesna; Bakić, Gordana; Milošević, Miloš; Antonović, Dušan

(Taylor & Francis Ltd, Abingdon, 2019)

TY  - JOUR
AU  - Mitrović, Aleksandra
AU  - Tanasić, Ivan
AU  - Mitrović, Nenad
AU  - Miletić, Vesna
AU  - Bakić, Gordana
AU  - Milošević, Miloš
AU  - Antonović, Dušan
PY  - 2019
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/2396
AB  - The study showed an application of the 3 D Digital Image Correlation Method (3 D-DIC) for detection of von Mises strain in samples of the self-etch, self-adhesive resin based cement (RBC). The aim was to determine and compare strain in the self-cured and light-cured Maxcem Elite, furthermore to investigate the hardness of these two cement-types. The experiment was carried out using two groups of Maxcem Elite (Kerr, Orange, CA, USA) samples; each tested group includes five (o5 x 2 mm sized) samples, for both self-curing and light-curing mode. All samples were prepared by filling teflon ring-type molds. In addition, Vickers micro-hardness was measured for all samples. Maxcem Elite showed similar maximum strain values from 10% to 12% for both groups. Besides the maximum strain value, the 3 D-DIC method also enabled monitoring the change of strain field even after the recommended polymerization time. This method has shown that the polymerization shrinkage continues even after 10 min which disagreed with manufacturer's suggestion. Group II showed maximum strain values of 12% in the peripheral zone after 10 min, in the last Stage (Stage 60). Statistically significant difference was not found in the overall strain between self- and light-cured Maxcem Elite neither peripherally (p = 0.118) nor centrally (p = 0.879). However, statistical significance was found in strain regarding central and peripheral zone in both, self-cured (p = 0.020) and light-cured (p = 0.002) Maxcem Elite. The mean von Mises strain values in the periphery of the samples (Section 0) were significantly higher compared to strain values in the center of the samples (for Section 1 and 2). The last stage (Stage 60) of the light-cured Maxcem Elite polymerization showed significantly higher values of von Mises strain compared to initial stage (Stage 0). Higher values of micro-hardness were noticed on the surfaces directly exposed to LED lamp after performing measurements of micro-hardness on light-cured samples.
PB  - Taylor & Francis Ltd, Abingdon
T2  - Journal of Adhesion Science & Technology
T1  - Analysis of the strain and hardness in self-cured and light-cured self-adhesive resin based cement
VL  - 33
IS  - 24
SP  - 2684
EP  - 2695
DO  - 10.1080/01694243.2019.1654221
ER  - 
@article{
author = "Mitrović, Aleksandra and Tanasić, Ivan and Mitrović, Nenad and Miletić, Vesna and Bakić, Gordana and Milošević, Miloš and Antonović, Dušan",
year = "2019",
abstract = "The study showed an application of the 3 D Digital Image Correlation Method (3 D-DIC) for detection of von Mises strain in samples of the self-etch, self-adhesive resin based cement (RBC). The aim was to determine and compare strain in the self-cured and light-cured Maxcem Elite, furthermore to investigate the hardness of these two cement-types. The experiment was carried out using two groups of Maxcem Elite (Kerr, Orange, CA, USA) samples; each tested group includes five (o5 x 2 mm sized) samples, for both self-curing and light-curing mode. All samples were prepared by filling teflon ring-type molds. In addition, Vickers micro-hardness was measured for all samples. Maxcem Elite showed similar maximum strain values from 10% to 12% for both groups. Besides the maximum strain value, the 3 D-DIC method also enabled monitoring the change of strain field even after the recommended polymerization time. This method has shown that the polymerization shrinkage continues even after 10 min which disagreed with manufacturer's suggestion. Group II showed maximum strain values of 12% in the peripheral zone after 10 min, in the last Stage (Stage 60). Statistically significant difference was not found in the overall strain between self- and light-cured Maxcem Elite neither peripherally (p = 0.118) nor centrally (p = 0.879). However, statistical significance was found in strain regarding central and peripheral zone in both, self-cured (p = 0.020) and light-cured (p = 0.002) Maxcem Elite. The mean von Mises strain values in the periphery of the samples (Section 0) were significantly higher compared to strain values in the center of the samples (for Section 1 and 2). The last stage (Stage 60) of the light-cured Maxcem Elite polymerization showed significantly higher values of von Mises strain compared to initial stage (Stage 0). Higher values of micro-hardness were noticed on the surfaces directly exposed to LED lamp after performing measurements of micro-hardness on light-cured samples.",
publisher = "Taylor & Francis Ltd, Abingdon",
journal = "Journal of Adhesion Science & Technology",
title = "Analysis of the strain and hardness in self-cured and light-cured self-adhesive resin based cement",
volume = "33",
number = "24",
pages = "2684-2695",
doi = "10.1080/01694243.2019.1654221"
}
Mitrović, A., Tanasić, I., Mitrović, N., Miletić, V., Bakić, G., Milošević, M.,& Antonović, D.. (2019). Analysis of the strain and hardness in self-cured and light-cured self-adhesive resin based cement. in Journal of Adhesion Science & Technology
Taylor & Francis Ltd, Abingdon., 33(24), 2684-2695.
https://doi.org/10.1080/01694243.2019.1654221
Mitrović A, Tanasić I, Mitrović N, Miletić V, Bakić G, Milošević M, Antonović D. Analysis of the strain and hardness in self-cured and light-cured self-adhesive resin based cement. in Journal of Adhesion Science & Technology. 2019;33(24):2684-2695.
doi:10.1080/01694243.2019.1654221 .
Mitrović, Aleksandra, Tanasić, Ivan, Mitrović, Nenad, Miletić, Vesna, Bakić, Gordana, Milošević, Miloš, Antonović, Dušan, "Analysis of the strain and hardness in self-cured and light-cured self-adhesive resin based cement" in Journal of Adhesion Science & Technology, 33, no. 24 (2019):2684-2695,
https://doi.org/10.1080/01694243.2019.1654221 . .
2
2

Strain determination of self-adhesive resin cement using 3D digital image correlation method

Mitrović, Aleksandra; Tanasić, Ivan; Mitrović, Nenad; Milošević, Miloš S.; Tihaček-Šojić, Ljiljana; Antonović, Dušan

(Srpsko lekarsko društvo, Beograd, 2018)

TY  - JOUR
AU  - Mitrović, Aleksandra
AU  - Tanasić, Ivan
AU  - Mitrović, Nenad
AU  - Milošević, Miloš S.
AU  - Tihaček-Šojić, Ljiljana
AU  - Antonović, Dušan
PY  - 2018
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/2345
AB  - Introduction/Objective In an attempt to simplify dental procedures, a new group of resin cements, self-adhesive resin cements (SARCs), have been introduced. Performance of SARCs can widely vary. One of the main reasons of adhesion failure is polymerization shrinkage. The aim of this study was to determine, evaluate, and measure strain field of self-adhesive dual cure resin cement during polymerization in self-cure mode using 3D digital image correlation (DIC) method. Methods The self-adhesive Maxcem Elite (Kerr, Orange, CA, USA) cement was tested in five cylindrical samples (5 mm in diameter and 2 mm in thickness) prepared by filling plastic ring-type molds. Digital images were recorded immediately after sample preparation. Results Non-uniform strain distribution was found in resin cement with higher strain values along the periphery (up to 15%) and lower strain values in central parts (around 4%) of each sample. Conclusion It can be concluded that DIC is a powerful tool for full-field strain measurements in material characterization.
AB  - Uvod/Cilj U nastojanju da se pojednostave stomatološke procedure uvedene su nove grupe kompozitnih cemenata - samoadhezivni, dvojnovezujući kompozitni cementi. Svojstva ovih cemenata mogu da variraju u velikoj meri. Jedan od glavnih razloga narušavanja adhezionih svojstava kompozitnih cemenata je polimerizacijska kontrakcija. Cilj ovog rada je da se odredi i izmeri deformaciono polje samoadhezivnog dvojnovezujućeg kompozitnog cementa tokom hemijske polimerizacije korišćenjem eksperimentalne tehnike - metode 3D korelacije digitalnih slika. Metode Samoadhezivni kompozitni cement Maxcem Elite (Kerr, Orange, SAD) ispitivan je na pet uzoraka prečnika 5 mm, debljine 2 mm, koji su pripremljeni punjenjem plastičnih kalupa prstenastog oblika. Digitalne slike su zabeležene neposredno posle pripreme uzoraka. Rezultati Neuniformno deformaciono polje je pokazalo veće vrednosti deformacija na periferiji uzoraka (do 15%) i manje vrednosti deformacija u centralnim delovima uzoraka (oko 4%). Zaključak Može se zaključiti da je 3D korelacija digitalnih slika precizna i pouzdana metoda za merenje deformacionih polja u oblasti karakterizacije materijala.
PB  - Srpsko lekarsko društvo, Beograd
T2  - Srpski arhiv za celokupno lekarstvo
T1  - Strain determination of self-adhesive resin cement using 3D digital image correlation method
T1  - Utvrđivanje opterećenja samovezujućeg kompozitnog cementa primenom metode 3D korelacije digitalnih slika
VL  - 146
IS  - 7-8
SP  - 372
EP  - 377
DO  - 10.2298/SARH170530176M
ER  - 
@article{
author = "Mitrović, Aleksandra and Tanasić, Ivan and Mitrović, Nenad and Milošević, Miloš S. and Tihaček-Šojić, Ljiljana and Antonović, Dušan",
year = "2018",
abstract = "Introduction/Objective In an attempt to simplify dental procedures, a new group of resin cements, self-adhesive resin cements (SARCs), have been introduced. Performance of SARCs can widely vary. One of the main reasons of adhesion failure is polymerization shrinkage. The aim of this study was to determine, evaluate, and measure strain field of self-adhesive dual cure resin cement during polymerization in self-cure mode using 3D digital image correlation (DIC) method. Methods The self-adhesive Maxcem Elite (Kerr, Orange, CA, USA) cement was tested in five cylindrical samples (5 mm in diameter and 2 mm in thickness) prepared by filling plastic ring-type molds. Digital images were recorded immediately after sample preparation. Results Non-uniform strain distribution was found in resin cement with higher strain values along the periphery (up to 15%) and lower strain values in central parts (around 4%) of each sample. Conclusion It can be concluded that DIC is a powerful tool for full-field strain measurements in material characterization., Uvod/Cilj U nastojanju da se pojednostave stomatološke procedure uvedene su nove grupe kompozitnih cemenata - samoadhezivni, dvojnovezujući kompozitni cementi. Svojstva ovih cemenata mogu da variraju u velikoj meri. Jedan od glavnih razloga narušavanja adhezionih svojstava kompozitnih cemenata je polimerizacijska kontrakcija. Cilj ovog rada je da se odredi i izmeri deformaciono polje samoadhezivnog dvojnovezujućeg kompozitnog cementa tokom hemijske polimerizacije korišćenjem eksperimentalne tehnike - metode 3D korelacije digitalnih slika. Metode Samoadhezivni kompozitni cement Maxcem Elite (Kerr, Orange, SAD) ispitivan je na pet uzoraka prečnika 5 mm, debljine 2 mm, koji su pripremljeni punjenjem plastičnih kalupa prstenastog oblika. Digitalne slike su zabeležene neposredno posle pripreme uzoraka. Rezultati Neuniformno deformaciono polje je pokazalo veće vrednosti deformacija na periferiji uzoraka (do 15%) i manje vrednosti deformacija u centralnim delovima uzoraka (oko 4%). Zaključak Može se zaključiti da je 3D korelacija digitalnih slika precizna i pouzdana metoda za merenje deformacionih polja u oblasti karakterizacije materijala.",
publisher = "Srpsko lekarsko društvo, Beograd",
journal = "Srpski arhiv za celokupno lekarstvo",
title = "Strain determination of self-adhesive resin cement using 3D digital image correlation method, Utvrđivanje opterećenja samovezujućeg kompozitnog cementa primenom metode 3D korelacije digitalnih slika",
volume = "146",
number = "7-8",
pages = "372-377",
doi = "10.2298/SARH170530176M"
}
Mitrović, A., Tanasić, I., Mitrović, N., Milošević, M. S., Tihaček-Šojić, L.,& Antonović, D.. (2018). Strain determination of self-adhesive resin cement using 3D digital image correlation method. in Srpski arhiv za celokupno lekarstvo
Srpsko lekarsko društvo, Beograd., 146(7-8), 372-377.
https://doi.org/10.2298/SARH170530176M
Mitrović A, Tanasić I, Mitrović N, Milošević MS, Tihaček-Šojić L, Antonović D. Strain determination of self-adhesive resin cement using 3D digital image correlation method. in Srpski arhiv za celokupno lekarstvo. 2018;146(7-8):372-377.
doi:10.2298/SARH170530176M .
Mitrović, Aleksandra, Tanasić, Ivan, Mitrović, Nenad, Milošević, Miloš S., Tihaček-Šojić, Ljiljana, Antonović, Dušan, "Strain determination of self-adhesive resin cement using 3D digital image correlation method" in Srpski arhiv za celokupno lekarstvo, 146, no. 7-8 (2018):372-377,
https://doi.org/10.2298/SARH170530176M . .
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Experimental methodology for analysis of influence of dental implant design on load transfer

Šarac, Dušan; Mitrović, Nenad; Tanasić, Ivan; Tihaček-Šojić, Ljiljana

(Univerzitet u Beogradu - Mašinski fakultet, Beograd, 2018)

TY  - JOUR
AU  - Šarac, Dušan
AU  - Mitrović, Nenad
AU  - Tanasić, Ivan
AU  - Tihaček-Šojić, Ljiljana
PY  - 2018
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/2336
AB  - Deformations in the vicinity of dental implants are affected by their design and if threshold level of 0.3 % is surpassed, bone resorption could occur. The goal of this study is to present a novel experimental approch for the analysis of effect od dental implant geometry on the surrounding structure strain values. A bone block model, with dimensions of 68x25x9 mm, was made from polymethyl-methacrylate. 3D printed block mold also provided a fixture for vertically placed Strauman ø4.0x12 mm. The sample was loaded in a three-point bending setup. The axial force of 600 N was applied on the dental implant. The Digital Image Correlation method was used for strain and displacement measurement. The highest von Mises strain of 0.7 % is located in the area of implant neck. The maximum displacement value in loading direction was 0.466 mm. Surface strain and displacement are correlated with implant geometry. This experimental methodology can be utilized to estimate dental implant load transfer characteristics.
AB  - Dizajn dentalnih implanata utiče na vrednosti deformacija koje nastaju u njihovoj okolini, i ako se pređe granična vrednost od 0.3 %, može doći do resorpcije kosti. Cilj ove studije je da predstavi novi eksperimentalni pristup za analizu uticaja geometrije dentalnih implanata na deformacije okolne strukture. Model kosti, sa dimenzijama od 68h25h9 mm, je napravljen od polimetil-metakrilata. Kalup za model koji je napravljen pomoću tehnike 3D štampe, je takođe služio i kao fiksator položaja za vertikalno postavljeni implant Štrauman ø4.0x12 mm. Uzorak je opterećen na savijanje u tri tačke. Aksijalna sila od 600 N je primenjena na dentalni implant. Za merenje deformacija i pomeraja je korišćena metoda Digitalne korelacije slika. Najveće vrednosti Von Mizesovih deformacija od 0.7 % su izmerene u području vrata implanta. Maksimalne vrednosti pomeraja u pravcu opterećenja su iznosile 0.466 mm. Površinska deformacija i pomeraji su povezani sa geometrijom implanata. Ova eksperimentalna metodologija se može koristiti u cilju određivanja karakteristika prenosa opterećenja dentalnih.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Experimental methodology for analysis of influence of dental implant design on load transfer
T1  - Eksperimentalna metodologija za određivanje uticaja dizajna dentalnih implanata na prenos opterećenja
VL  - 46
IS  - 2
SP  - 266
EP  - 271
DO  - 10.5937/fmet1802266S
ER  - 
@article{
author = "Šarac, Dušan and Mitrović, Nenad and Tanasić, Ivan and Tihaček-Šojić, Ljiljana",
year = "2018",
abstract = "Deformations in the vicinity of dental implants are affected by their design and if threshold level of 0.3 % is surpassed, bone resorption could occur. The goal of this study is to present a novel experimental approch for the analysis of effect od dental implant geometry on the surrounding structure strain values. A bone block model, with dimensions of 68x25x9 mm, was made from polymethyl-methacrylate. 3D printed block mold also provided a fixture for vertically placed Strauman ø4.0x12 mm. The sample was loaded in a three-point bending setup. The axial force of 600 N was applied on the dental implant. The Digital Image Correlation method was used for strain and displacement measurement. The highest von Mises strain of 0.7 % is located in the area of implant neck. The maximum displacement value in loading direction was 0.466 mm. Surface strain and displacement are correlated with implant geometry. This experimental methodology can be utilized to estimate dental implant load transfer characteristics., Dizajn dentalnih implanata utiče na vrednosti deformacija koje nastaju u njihovoj okolini, i ako se pređe granična vrednost od 0.3 %, može doći do resorpcije kosti. Cilj ove studije je da predstavi novi eksperimentalni pristup za analizu uticaja geometrije dentalnih implanata na deformacije okolne strukture. Model kosti, sa dimenzijama od 68h25h9 mm, je napravljen od polimetil-metakrilata. Kalup za model koji je napravljen pomoću tehnike 3D štampe, je takođe služio i kao fiksator položaja za vertikalno postavljeni implant Štrauman ø4.0x12 mm. Uzorak je opterećen na savijanje u tri tačke. Aksijalna sila od 600 N je primenjena na dentalni implant. Za merenje deformacija i pomeraja je korišćena metoda Digitalne korelacije slika. Najveće vrednosti Von Mizesovih deformacija od 0.7 % su izmerene u području vrata implanta. Maksimalne vrednosti pomeraja u pravcu opterećenja su iznosile 0.466 mm. Površinska deformacija i pomeraji su povezani sa geometrijom implanata. Ova eksperimentalna metodologija se može koristiti u cilju određivanja karakteristika prenosa opterećenja dentalnih.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Experimental methodology for analysis of influence of dental implant design on load transfer, Eksperimentalna metodologija za određivanje uticaja dizajna dentalnih implanata na prenos opterećenja",
volume = "46",
number = "2",
pages = "266-271",
doi = "10.5937/fmet1802266S"
}
Šarac, D., Mitrović, N., Tanasić, I.,& Tihaček-Šojić, L.. (2018). Experimental methodology for analysis of influence of dental implant design on load transfer. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 46(2), 266-271.
https://doi.org/10.5937/fmet1802266S
Šarac D, Mitrović N, Tanasić I, Tihaček-Šojić L. Experimental methodology for analysis of influence of dental implant design on load transfer. in FME Transactions. 2018;46(2):266-271.
doi:10.5937/fmet1802266S .
Šarac, Dušan, Mitrović, Nenad, Tanasić, Ivan, Tihaček-Šojić, Ljiljana, "Experimental methodology for analysis of influence of dental implant design on load transfer" in FME Transactions, 46, no. 2 (2018):266-271,
https://doi.org/10.5937/fmet1802266S . .
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