scholarly journals Bulk-Fill Direct Restorative Materials: An In Vitro Assessment of Their Physio-Mechanical Properties

Oral ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 75-87
Author(s):  
Hui Woon Yeo ◽  
May Yeh Loo ◽  
Mariam Alkhabaz ◽  
Kai Chun Li ◽  
Joanne Jung Eun Choi ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Wear Testing ◽  
Restorative Materials ◽  
Different Depths ◽  
Bonferroni Test ◽  
In Vitro Assessment ◽  
High Level ◽  
Post Hoc ◽  
One Way Anova

Bulk-fill restorative material has gained popularity in clinical practice, due to their perceived timesaving aspect. Objective was to compare the properties of bulk-fill direct restorative materials. Filtek Z350 (CR), Filtek One Bulk Fill Restorative (BF), Fuji IX and EQUIA Forte (EF) were compared. Thirty specimens from each material were prepared according to ISO 4049 for three-point flexural strength. Elastic moduli and hardness (n = 20) were evaluated using nanoindentation. Depth of cure (DC) (n = 20) was measured for BF at three different depths (2, 3, 4 mm) and at two irradiation times (20 and 40 s). Wear testing was carried out for three different periods (3, 6, 12 month(s)). All specimens were stored in 37 °C water for 24 h prior to testing. Results were evaluated using one-way ANOVA followed by a post hoc Bonferroni test (p < 0.05). BF and CR showed a significantly higher flexural strength than other groups (p < 0.05), and the highest Weibull modulus was found in CR. BF showed sufficient DC with at least 85%, at all thicknesses. CR and BF also had a high level of translucency than EF and Fuji IX. Significant differences in flexural strength were found among all materials except between Fuji IX and EF. While all material tested are suitable for use clinically, BF and CR have superior properties than GIC based bulk-fill.

scholarly journals Vickers Hardness and Shrinkage Stress Evaluation of Low and High Viscosity Bulk-Fill Resin Composite

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1477
Author(s):  
Allegra Comba ◽  
Nicola Scotti ◽  
Tatjana Maravić ◽  
Annalisa Mazzoni ◽  
Massimo Carossa ◽  
...  
Keyword(s):  
Resin Composite ◽  
Linear Regression Analysis ◽  
In Vitro Study ◽  
High Viscosity ◽  
Shrinkage Stress ◽  
Light Curing ◽  
Different Depths ◽  
Bonferroni Test ◽  
Post Hoc

The aim of this in vitro study was to evaluate the hardness and shrinkage stress (SS) of six bulk-fill resin composites. To evaluate microhardness (MH), ten 6 mm specimens were prepared using a metal mold for each selected bulk-fill resin composite and irradiated from the top side for 40 s using an LED light. After 24 h of storage, Vickers MH was evaluated on the upper, lower and lateral sides of the specimens. SS evaluation was then performed with a universal machine, which evaluated the contraction force generated by a bulk-fill composite specimen placed between two metal cylinders during and after light curing. The results were evaluated with a one-way ANOVA test with a post-hoc Bonferroni test and linear regression analysis (p < 0.05). All materials showed a significant MH decrease between the top and bottom surfaces. However, the bulk-fill materials tested performed differently when considering lateral depth progression. ANOVA tests for SS evaluation showed that both SDR and Venus Bulk Fill had significantly lower stress during irradiation than other tested materials. Further, MH decrease became significantly lower from the top surface at different depths in each tested group. Among the different resins, Venus Bulk Fill and SDR showed not only inferior hardness, but also a significant reduction in SS.

scholarly journals Depth-Related Curing Potential of Ormocer- and Dimethacrylate-Based Bulk-Fill Composites

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6753
Author(s):  
Ramona S. Oltramare ◽  
Reto Odermatt ◽  
Phoebe Burrer ◽  
Thomas Attin ◽  
Tobias T. Tauböck
Keyword(s):  
Double Bond ◽  
Repeated Measures ◽  
In Vitro Study ◽  
High Viscosity ◽  
Degree Of Conversion ◽  
Double Bond Conversion ◽  
Nanohybrid Composite ◽  
Post Hoc ◽  
One Way Anova

The aim of this in vitro study was to investigate the degree of C=C double bond conversion of high-viscosity dimethacrylate- or ormocer-based bulk-fill composites as a function of measurement depth. Four bulk-fill composites (Tetric EvoCeram Bulk Fill, x-tra fil, SonicFill, and Bulk Ormocer) and the conventional nanohybrid composite Tetric EvoCeram were applied in standardized Class II cavities (n = 6 per group) and photoactivated for 20 s at 1350 mW/cm2. The degree of conversion of the composites was assessed using Fourier-transform infrared spectroscopy at seven measurement depths (0.15, 1, 2, 3, 4, 5, 6 mm). Data were analyzed using repeated measures ANOVA and one-way ANOVA with Bonferroni post-hoc tests (α = 0.05). The investigated bulk-fill composites showed at least 80% of their maximum degree of conversion (80% DCmax) up to a measuring depth of at least 4 mm. Tetric EvoCeram Bulk Fill and Bulk Ormocer achieved more than 80% DCmax up to a measuring depth of 5 mm, x-tra fil up to 6 mm. The conventional nanohybrid composite Tetric EvoCeram achieved more than 80% DCmax up to 3 mm. In contrast to the conventional composite, the investigated ormocer- and dimethacrylate-based bulk-fill composites can be photo-polymerized in thick layers of up to at least 4 mm with regard to their degree of C=C double bond conversion.

scholarly journals Antibiofilm Effect of Clitoria ternatea Flower Juice on Porphyromonas gingivalis in vitro

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Armelia Sari Widyarman ◽  
Stephani Sumadi ◽  
Tri Putriany Agustin
Keyword(s):  
Porphyromonas Gingivalis ◽  
Incubation Time ◽  
Laboratory Research ◽  
Assay Method ◽  
Blue Color ◽  
Clitoria Ternatea ◽  
Anova Test ◽  
Post Hoc ◽  
One Way Anova

  Introduction: Clitoria ternatea flower contains flavonoid such as anthocyanin that gives the blue color to its flower and has antimicrobial activity.   Objectives: The aim of this study was to examine the effect of flower juice of Clitoria ternatea against Porphyromonas gingivalis biofilm viability in vitro.   Methods: This study was experimental laboratory research using biofilm assay method. P. gingivalis was cultured in BHI broth in 37°C for 24h under anaerobic condition. Fresh flowers of Clitoria ternatea were extracted using mortar and pestle and diluted into 6 different concentrations: 100%, 50%, 25%, 12.5%, 6.25%, and 3.125% with phosphate buffer saline (PBS). Chlorhexidine (0.2%) was used as positive control and biofilm without treatment as negative control. The flower juice was distributed into 96 well-plates that contained biofilm of P. gingivalis and incubated for 1h, 3h, 6h, and 24h in 37°C, anaerobic atmosphere. Biofilm was measured using crystal violet dye with microplate reader (490 nm). Data were statistically analysed using one-way ANOVA test and Post Hoc test with p<0.05 was set as significant different.   Result: Result showed that Clitoria ternatea flower juice significantly reduced the Porphyromonas gingivalis biofilm viability in all concentration and all incubation time. The most effective concentration to inhibit Porphyromonas gingivalis biofilm was 100% in 1h incubation time which biofilm was diminished (Optical Density=0.00). One way ANOVA test and Post Hoc test showed a significant biofilm reduction in all concentration and all incubation time after treatment with the flower juice compared to control (p<0.05).   Conclusion: Clitoria ternatea flower juice has antibiofilm effect against Porphyromonas gingivalis. This result showed this flower juice may be useful for combating periodontal pathogens. However, further studies using other bacteria are still needed to confirm this result.

scholarly journals EFEK ANTIBAKTERI EKSTRAK DAUN MIMBA (Azadirachta indica) TERHADAP PERTUMBUHAN Enterococcus faecalis SECARA IN-VITRO

2019 ◽  
Vol 11 (1) ◽  
pp. 23-32
Author(s):  
Cut Soraya ◽  
Sunnati ◽  
Fenny Wulandari
Keyword(s):  
Phenolic Compound ◽  
Enterococcus Faecalis ◽  
Azadirachta Indica ◽  
Control Group ◽  
Post Hoc ◽  
One Way Anova ◽  
Banda Aceh

Perawatan saluran akar adalah perawatan yang dilakukan untuk mempertahankan gigi agar dapatberfungsi di lengkung gigi selama mungkin. Penyebab dominan dari kegagalan perawatan endodontikadalah adanya bakteri di dalam saluran akar. Bakteri yang paling sering ditemukan pada isolasi darigigi yang mengalami kegagalan perawatan saluran akar adalah Enterococcus faecalis (E.faecalis).Salah satu jenis tanaman herbal yang memiliki sifat antibakteri yang tinggi adalah tanaman mimba(A.indica). Tujuan penelitian ini untuk menganalisis efek antibakteri ekstrak daun mimba (A.indica)terhadap pertumbuhan E. faecalis. Penelitian ini merupakan penelitian eksperimental laboratorisdengan desain penelitian true experimental posttest only control group. Penelitian dilalukan denganmenguji ekstrak daun mimba (A.indica) pada konsentrasi 10%, 20%, 40%, 60%, 80% dan 100%terhadap pertumbuhan E. faecalis yang dilakukan di Laboratorium Mikrobiologi Fakultas KedokteranHewan (FKH) Universitas Syiah Kuala Banda Aceh. Hasil uji fitokimia yang dilakukan menunjukkanbahwa ekstrak daun mimba (A. indica) positif mengandung triterpenoid, phenolic compound, tanin,steroid dan saponin yang berperan sebagai antibakteri. Hasil uji efek antibakteri ekstrak daun mimba(A. indica) menunjukkan adanya pembentukan zona hambat di sekitar kertas cakram pada setiapkonsentrasi. Hal ini membuktikan bahwa ekstrak daun mimba memiliki efek antibakteri yangmemiliki kemampuan dalam menghambat pertumbuhan E. faecalis. Uji statistik digunakanmenggunakan one way ANOVA. Kemudian dilakukan uji lanjut (Post hoc test) menggunakan LeastSignificant Difference untuk menganalisis perbedaan efek antibakteri ekstrak daun mimba (A. indica)dalam konsentrasi 10%, 20%, 40%, 60%, 80% dan 100% terhadap pertumbuhan E.faecalis.Kesimpulan penelitian ini ekstrak daun mimba (A. indica) berpotensi menghambatpertumbuhan E. faecalis.Kata Kunci: Azadirachta indica, Enterococcus faecalis, perawatan saluran akar.

scholarly journals Evaluation of Dual-Cure Resin Cement Polymerization under Different Types and Thicknesses of Monolithic Zirconia

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Pinar Turkoglu ◽  
Deniz Sen
Keyword(s):  
Vickers Hardness ◽  
Resin Cement ◽  
Different Types ◽  
Monolithic Zirconia ◽  
Different Depths ◽  
Post Hoc ◽  
One Way Anova

Purpose. The aim of the present study was to investigate the effects of the type and thickness of the zirconia material on the microhardness of the underlying dual-cure resin cement. Materials and Methods. Eight disk-shaped zirconia specimens with a 4-mm diameter and four varying thicknesses (0.5, 1.0, 1.5, and 2.0 mm) were fabricated from two different monolithic zirconia materials: posterior monolithic zirconia (Prettau) and anterior monolithic zirconia (Prettau Anterior). Dual-cure resin cement specimens with a 4-mm diameter and 5-mm height were prepared using Teflon cylinder molds and activated by light beneath the eight zirconia disks and without any zirconia disk for 20 s (n=12). A total of 108 specimens were embedded in acrylic. Vickers hardness of each specimen was measured at three different depths using a microhardness device with a 50-g load. All data were statistically evaluated using three-way ANOVA, one-way ANOVA, independent samples t-tests, and Bonferroni corrected post hoc tests (α=.05). Results. Dual-cure resin cement’s microhardness was significantly higher for the samples polymerized beneath anterior monolithic zirconia compared to posterior monolithic zirconia. The hardness decreased as the thickness increased for both types of zirconia; the latter was attributed to an attenuated curing efficiency. Conclusion. Microhardness of the dual-cure resin cement is influenced by both the type and the thickness of the monolithic zirconia restoration. Polymerization efficiency for resin cement cured under anterior monolithic zirconia may be superior to cured beneath posterior monolithic zirconia.

scholarly journals The influence of different screw tightening forces on the vertical misfit of implant-supported frameworks

2005 ◽  
Vol 13 (2) ◽  
pp. 120-125 ◽  
Author(s):  
Diego Klee de Vasconcellos ◽  
Marco Antonio Bottino ◽  
Renato Sussumu Nishioka ◽  
Luiz Felipe Valandro ◽  
Elza Maria Valadares da Costa
Keyword(s):  
Repeated Measures ◽  
In Vitro Study ◽  
Pairwise Comparisons ◽  
Tukey Test ◽  
Nickel Chromium ◽  
Marginal Discrepancy ◽  
The Mean ◽  
Post Hoc ◽  
One Way Anova

OBJECTIVES: The present in vitro study was designed to compare the differences in the vertical misfit of implant-supported frameworks using three different forces for tightening the bridge locking screws: fastening by hand until first resistance, and using torque drivers with 10 and 20Ncm. METHODS: The investigation was conducted based on the results given by 9 six-unit nickel-chromium (2 abutments/ 4 pontics) screw-retained implant-supported frameworks. The structures were exposed to simulated porcelain firings. The marginal misfit measurements were made using a traveling measuring microscope at selected screw tightening forces: fastening by hand until first resistance, and using torque drivers with 10 and 20Ncm. The results were submitted to one-way ANOVA with repeated measures on one factor, and post hoc pairwise comparisons using Tukey test (5%). RESULTS: The mean marginal misfit of the frameworks, fastening the screws by hand until first resistance, was 41.56µm (SD±12.45µm). The use of torque driver devices caused a significant reduction in marginal opening (p<0.05). With the lowest torque available (10Ncm), the mean marginal discrepancy at the abutment-framework interface was reduced an average of 52% to a mean marginal opening of 19.71µm (SD±2.97µm). After the use of the 20Ncm torque driver, the mean marginal discrepancy of the frameworks was reduced an average of 69% to a mean marginal opening of 12.82µm (SD±4.0µm). Comparing the use of torque drivers with 10 and 20 Ncm torque, the means are not significantly different from one another. CONCLUSION: The seating force has an important effect on the vertical misfit measurements, once it may considerably narrow the vertical misfit gaps at the abutment-framework interface, thus leading to a misjudgment of the real marginal situation.

In Vitro Evaluation of Microleakage and Microhardness of Ethanolic Extracts of Propolis in Different Proportions Added to Glass Ionomer Cement

2016 ◽  
Vol 40 (2) ◽  
pp. 136-140 ◽  
Author(s):  
Mustafa Altunsoy ◽  
Mehmet Tanrıver ◽  
Uğur Türkan ◽  
Mehmet Emin Uslu ◽  
Sibel Silici
Keyword(s):  
Glass Ionomer Cement ◽  
Antibacterial Properties ◽  
Dental Practice ◽  
Glass Ionomer ◽  
Tukey Test ◽  
Ethanolic Extracts ◽  
Post Hoc ◽  
One Way Anova ◽  
Ionomer Cement

Objective: To evaluate the effect of ethanolic extracts of propolis (EEP) addition in different proportions to glass ionomer cement (GIC) on microleakage and microhardness of GIC. Study design: The cement was divided into four groups: one using the original composition and three with 10%, 25%, and 50% EEP added to the liquid and then manipulated. For microleakage assessment, sixty primary molars were randomly divided into four groups (n=15). Standard Class II cavities were prepared and then filled with EEP in different proportions added to GICs. Microleakage test was performed using a dye penetration method. The data were analyzed using one-way ANOVA and Mann - Whitney U tests (α = 0.05). Disc shaped specimens were prepared from the tested GIC to determine Vickers hardness (VHN). The data were analyzed using one-way ANOVA and post hoc Tukey test (α = 0.05). Results: There were no statistically significant differences between the groups in terms of microleakage (p &gt; 0.05). There were statistically significant differences between the VHN values of groups (p &lt; 0.05). Increasing addition of EEP to GIC statistically significantly increased VHN value of GIC (p &lt; 0.05). Conclusions: The addition of EEP to GIC increased the microhardness of the GIC and did not adversely affect the microleakage. Thus, it might be used during routine dental practice due to its antibacterial properties

scholarly journals UJI EFEK ANTI BAKTERI EKSTRAK BUNGA CENGKEH TERHADAP BAKTERI Streptococcus mutans SECARA IN VITRO

e-GIGI ◽  
2014 ◽  
Vol 2 (2) ◽  
Author(s):  
Juvensius R. Andries ◽  
Paulina N. Gunawan ◽  
Aurelia Supit
Keyword(s):  
Streptococcus Mutans ◽  
Control Group ◽  
Antibacterial Effects ◽  
Control Group Design ◽  
Group Design ◽  
Post Test ◽  
Clove Extract ◽  
Post Hoc ◽  
One Way Anova

Abstrak: Minyak cengkeh berguna sebagai antibakteri alami. Minyak esensial dari cengkeh mempunyai fungsi anestetik dan antimikrobial. Zat yang terkandung dalam cengkeh yang bernama eugenol dapat membunuh bakteri termasuk bakteri yang resisten terhadap antibiotika, salah satunya adalah bakteri Streptococcus mutans. Bakteri ini merupakan mikroorganisme penyebab utama terjadinya karies. Tujuan dari penelitian ini yaitu untuk mengetahui efek antibakteri ekstrak cengkeh terhadap bakteri Streptococcus mutans secara in vitro. Penelitian ini merupakan penelitian eksperimental menggunakan post test only control group design. Penelitian ini menggunakan bahan coba ekstrak cengkeh dengan konsentrasi 40%, 60%, dan 80%, Ciprofloxacin, aquades dengan pengulangan sebanyak lima kali. Data dikumpulkan dan dianalisis dengan one-way ANOVA dan post-hoc uji LSD ( = 0,05). Berdasarkan hasil uji statistik penelitian uji efek antibakteri ekstrak cengkeh terhadap bakteri streptococcus mutans secara in vitro, dapat disimpulkaan bahwa ekstrak cengkeh memiliki efek antibakteri dalam menghambat pertumbuhan bakteri Streptococcus mutans secara in vitro. Hasil uji lanjut post-hoc uji LSD menunjukan daya hambat ekstrak cengkeh 40%, 60%, 80%, lebih kecil (p<0,05) dalam menghambat Streptococcus mutans secara in vitro dibandingkan Ciprofloxacin. Kata Kunci: Ekstrak cengkeh, Streptococcus mutans.   Abstract: Clove oil is useful as a natural antibacterial agent, essential oil of clove has anesthetic and antimicrobial effect. Substances contained in clove called eugenol can kill bacteria including antibiotic resistant bacteria, one of which is the bacteria Streptococcus mutans. This bacteria is a major cause for caries. The purpose of this study was to mengetahui clove extrack antibacterial effects againts Streptococcus mutans bacteria in vitro. This study is an experimental study using a post test only control group design. This research try using clove extract with a concentration of 40%, 60%, and 80%, Ciprofloxacin, aquades repetition five times. Data collected and analyzed by one-way ANOVA and post-hoc LSD test (α = 0.05). Based on the results of the statistical test to test the effects of anti-bacterial research clove extracts against Streptococcus mutans bacteria in vitro, can disimpulkaan that clove extracts have antibacterial effects in inhibiting the growth of Streptococcus mutans bacteria in vitro.further test result post-hoc LSD test shoved its inhibitory clove extract 40%, 60%, 80% smaller (p<0,05)in hibiting Streptococcus mutans in vitro compared Ciprofloxacin. Keywords: clove extract, Streptococcus mutans

Sign in / Sign up

Export Citation Format

Share Document