scholarly journals Impact of monomer functional groups of resin-based materials on the interaction with water

2015 ◽  
Vol 18 (2) ◽  
pp. 58
Author(s):  
Karin Cristina Modena ◽  
Vanessa Pavoni Cannabrava ◽  
Jaine Zanolla ◽  
Carlos Ferreira Santos ◽  
Maria Fidela Lima Navarro ◽  
...  
Keyword(s):  
Functional Groups ◽  
Water Solubility ◽  
Adhesive System ◽  
Composite Resins ◽  
Constant Mass ◽  
Dentin Bonding ◽  
Bonding Systems ◽  
Post Hoc ◽  
One Way Anova

<p><strong>Objective: </strong>The objective of this <em>in vitro</em> study was to compare dentin bonding systems and composite resins based on their functional groups in terms of water sorption (WS) and water solubility (WSB). <strong>Material and Methods: </strong>Three dentin bonding systems (Adper Single Bond 2 – 3M ESPE, Clearfil SE Bond – Kuraray, P90 Adhesive System – 3M ESPE) and three commercial composite resins (Filtek Z350 – 3M ESPE, Filtek Z250 – 3M ESPE, Filtek P90 – 3M ESPE) were tested. Eight specimens of each material were prepared to evaluate the WS and WSA. The discs were individually stored in a desiccator until constant mass was achieved. Specimens were then individually stored in distilled water until the mass was stabilized again. Finally, the specimens were dried again in the desiccator until constant mass was obtained. WS and WSA were calculated from these measurements. Data were analyzed by one-way ANOVA and Tukey post hoc test (p &lt; 0.05). <strong>Results:</strong> Filtek Silorane-Bond presented the lowest values of WS, and Clearfil SE Bond presented the lowest WSB. Filtek Silorane resin showed the lowest WS and WSA results. <strong>Conclusion:</strong> Based on the results, it can be concluded that the WS and WSB were influenced by the composition of the materials. The main functional group of the materials determines their susceptibility to water and influences their performance. </p>

scholarly journals Shear Bond Strength of Three Composite Resins to Fluorosed and Sound Dentine: In Vitro Study

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Sabra Jaâfoura ◽  
Amira Kikly ◽  
Saida Sahtout ◽  
Mounir Trabelsi ◽  
Dorra Kammoun
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Adhesive System ◽  
Composite Resins ◽  
Vitro Study ◽  
Adhesion Forces ◽  
Average Shear ◽  
One Way Anova

Introduction. This in vitro study compared the shear strength of three composite resin systems to fluorosed and normal dentin. Methods. Silorane FiltekTM P90, FiltekTMZ250 XT in combination with the adhesive system AdperTM Single bond 2, and Amelogen® Plus in association with Peak Universal Bond® were tested. Fifteen normal and 15 fluorosed dentine disks were prepared per material. The shear bond strength test was performed using a universal machine. Results. One-way ANOVA revealed significant differences in bond strength between the tested composite resins. All tested materials had significantly different adhesion at the fluorosed and the nonfluorosed interface. FiltekTM Z250 XT and Silorane had lower adhesion values to fluorosed than to normal dentin. In contrast, Amelogen® Plus presented a better average resistance at the fluorosed interface. Conclusion. Amelogen® Plus presented a better average shear bond strength on the fluorosed dentine. FiltekTMZ250 XT showed the best adhesion forces and shear bond strength with sound dentine. Further studies are needed to better understand the sealing of these systems.

scholarly journals Impact of refrigeration on the surface hardness of hybrid and microfilled composite resins

2009 ◽  
Vol 20 (1) ◽  
pp. 42-47 ◽  
Author(s):  
Fernando Henrique Ruppel Osternack ◽  
Danilo Biazzetto de Menezes Caldas ◽  
Rodrigo Nunes Rached ◽  
Sérgio Vieira ◽  
Jeffrey A. Platt ◽  
...  
Keyword(s):  
Room Temperature ◽  
Surface Hardness ◽  
In Vitro Study ◽  
Knoop Hardness ◽  
Composite Resins ◽  
Bottom Surface ◽  
Steel Mold ◽  
Polymerization Condition ◽  
Post Hoc

This in vitro study evaluated the Knoop hardness of the composite resins Charisma® (C) and Durafill VS® (D) polymerized in 3 different conditions: at room temperature (A) (23 ± 1°C); refrigerated at 4 ± 1°C and immediately photo-activated after removal from the refrigerator (0); and, refrigerated at 4 ± 1°C and photo-activated after a bench time of 15 min at room temperature (15). One hundred and twenty specimens (4 mm diameter and 2 mm depth) were made using a stainless steel mold and following manufacturer's instructions. All specimens were tested immediately after polymerization (I) and after 7 days of water storage in the dark at room temperature (7d). The data were subjected to ANOVA and post-hoc Tukey's test (a=0.05). On the top surface, CAI was statistically similar to C15I and DAI to D15I (p>0.05). On the bottom surface, CAI presented higher hardness values when compared to COI and C15I (p<0.05). The D groups showed no significant differences (p>0.05) on the bottom surfaces for any tested polymerization condition. After 7 days of storage, the Knoop hardness decreased significantly (p<0.05) for groups C7d and D7d except for C07d, which was not different from COI at either surface (p>0.05). D07d showed higher Knoop hardness (p<0.05) values on the top surface when compared to the other groups.

scholarly journals Morphology and thickness of the diffusion of resin through demineralized or unconditioned dentinal matrix

2002 ◽  
Vol 16 (2) ◽  
pp. 115-120 ◽  
Author(s):  
César Augusto Galvão Arrais ◽  
Marcelo Giannini
Keyword(s):  
Adhesive System ◽  
Adhesive Systems ◽  
Hybrid Layer ◽  
Human Teeth ◽  
Bonding Agents ◽  
Mean Values ◽  
Dentin Bonding ◽  
Occlusal Surfaces ◽  
The One ◽  
Bonding Systems

The formation of a hybrid layer is the main bonding mechanism of current dentin-bonding systems. This study evaluated the morphology and thickness of the resin-infiltrated dentinal layer after the application of adhesive systems. The dentin-bonding agents were evaluated on flat dentinal preparations confected on the occlusal surfaces of human teeth. The test specimens were prepared and inspected under scanning electron microscopy at a magnification of X 2,000. The adhesive systems were responsible for different hybrid layer thicknesses (p < 0.05), and the mean values were: for Scotchbond MP Plus (SM), 7.41 ± 1.24mum; for Single Bond (SB), 5.55 ± 0.82mum; for Etch & Prime 3.0 (EP), 3.86 ± 1.17mum; and for Clearfil SE Bond (CB), 1.22 ± 0.45mum. The results suggest that the conventional three-step adhesive system (SM) was responsible for the thickest hybrid layer, followed by the one-bottle adhesive (SB). The self-etching adhesives, EP and CB, produced the formation of the thinnest hybrid layers.

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 Radiopacity evaluation of composite restorative resins and bonding agents using digital and film x-ray systems

2012 ◽  
Vol 06 (02) ◽  
pp. 115-122 ◽  
Author(s):  
Bengi Oztas ◽  
Sebnem Kursun ◽  
Gul Dinc ◽  
Kıvanc Kamburoglu
Keyword(s):  
Composite Materials ◽  
In Vitro Study ◽  
Composite Resins ◽  
Human Tooth ◽  
Dental Resin ◽  
Bonding Agents ◽  
Dentin Bonding ◽  
Dentin Bonding Agents ◽  
Phosphor Plates

ABSTRACTObjective: The purpose of this in vitro study was to explore the radiopacity of composite resins and bonding materials using film and phosphor plates.Methods: Nine composite dental resin specimens and human tooth slices were exposed together with an aluminium stepwedge using dental film and phosphor plates. Eight dentin bonding specimens were prepared and exposed in a similar manner. Their radiopacity on film was assessed using a transmission densitometer, and the radiopacity with phosphor plates was assessed digitally using the system’s own software (Digora). Data were analysed using one-way analysis of variance (ANOVA) and post-hoc Tukey tests (P<.05). Film and phosphor plate radiopacity values were compared using simple regression analysisResults: Excellent linear correlation was found between film and phosphor plates for both composite resins and bonding agents. The composite materials Spectrum Tph and Natural Look exhibited the highest radiopacity with film and with phosphor plates, respectively. All the dentin bonding agents tested exhibited lower radiopacity than dentin. Conclusion: Synergy, Ice, Filtek Silorane, Filtek Z250, Clearfil Majesty Posterior, Herculite Classic, Spectrum Tph, and Natural Look composite materials exhibited greater radiopacity than dentin, and all the dentin bonding agents tested exhibited lower radiopacity than either enamel or dentin. (Eur J Dent 2012;6:115-122)

Effect of Baicalein on Matrix Metalloproteinases and Durability of Resin-Dentin Bonding

2018 ◽  
Vol 43 (4) ◽  
pp. 426-436 ◽  
Author(s):  
J Li ◽  
B Chen ◽  
N Hong ◽  
S Wu ◽  
Y Li
Keyword(s):  
Matrix Metalloproteinases ◽  
Bonding Strength ◽  
Resin Composite ◽  
Artificial Saliva ◽  
Adhesive System ◽  
Inhibitory Effect ◽  
Dentin Bonding ◽  
Microtensile Testing ◽  
Etch And Rinse

SUMMARY Objective: In an attempt to increase resin-dentin bonding quality, this study used baicalein as a preconditioner in an etch-and-rinse adhesive to evaluate its effect on matrix metalloproteinases (MMPs) and adhesive durability. Methods: As a MMP inhibitor and potential collagen cross-linking agent, baicalein was used as a preconditioner in an etch-and-rinse adhesive system. The degree of conversion was evaluated by Fourier-transform infrared spectroscopy. EnzChek gelatinase/collagenase assay kits were then used to detect the MMP inhibitory effect of different concentrations of baicalein (0.1, 0.5, 2.5, and 5.0 μg/mL) on dentin powders. During in vitro bonding procedures, flat dentin surfaces on sound third molars were preconditioned with 2.5 μg/mL baicalein after being acid-etched; this step was followed by continuation of adhesive processes and build-up of resin composite. After resin-dentin stick preparation, bonding strength, failure mode, and interface nanoleakage were respectively evaluated via microtensile testing, stereomicroscopy, and field emission scanning electron microscopy either immediately or after storage in artificial saliva for three or six months. Data were analyzed by two-way analysis of variance and Tukey test (α=0.05). Results: Baicalein at a concentration of 0-5.0 μg/mL did not influence the conversion of adhesives. However, it inhibited the activities of dentin-bond gelatinase and collagenase, especially at a concentration of 2.5 μg/mL, while effectively increasing microtensile bonding strength and decreasing nanoleakage in vitro, both immediately and after aging. Conclusions: Baicalein used as preconditioner in an etch-and-rinse adhesive system has an anti-MMP function and effectively improves resin-dentin bonding durability in vitro, which has potential value in clinical bonding procedures.

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