scholarly journals Physicochemical Properties of Epoxy Resin-Based and Bioceramic-Based Root Canal Sealers

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Ju Kyung Lee ◽  
Sang Won Kwak ◽  
Jung-Hong Ha ◽  
WooCheol Lee ◽  
Hyeon-Cheol Kim
Keyword(s):  
Physicochemical Properties ◽  
Epoxy Resin ◽  
Setting Time ◽  
Alkaline Ph ◽  
Ph Change ◽  
Ah Plus ◽  
The One ◽  
Post Hoc ◽  
Root Canal Sealers ◽  
One Way Anova

Three bioceramic sealers (EndoSequence BC sealer, EndoSeal MTA, and MTA Fillapex) and three epoxy resin-based sealers (AH-Plus, AD Seal, and Radic-Sealer) were tested to evaluate the physicochemical properties: flow, final setting time, radiopacity, dimensional stability, and pH change. The one-way ANOVA and Tukey’s post hoc test were used to analyze the data (P=0.05). The MTA Fillapex sealer had a highest flow and the BC Sealer presented a flow significantly lower than the others (P<0.05). The BC Sealer and MTA Fillapex samples were not set in humid incubator condition even after one month. EndoSeal MTA had the longest setting time among the measurable materials and Radic-Sealer and AD Seal showed shorter setting time than the AH-Plus (P<0.05). AH-Plus and EndoSeal MTA showed statistically higher values and MTA Fillapex showed statistically lower radiopacity (P<0.05). BC Sealer showed the highest alkaline pH in all evaluation periods. Set samples of 3 epoxy resin-based sealers and EndoSeal MTA presented a significant increase of pH over experimental time for 4 weeks. In conclusion, the bioceramic sealer and epoxy resin-based sealers showed clinical acceptable physicochemical properties, but BC Sealer and MTA Fillapex were not set completely.

scholarly journals Influence of Powder-to-Gel Ratio on Physicochemical Properties of a Calcium Silicate Sealer

2020 ◽  
pp. 337-345
Author(s):  
Fernanda F. E. Torres ◽  
Patricia Perinoto ◽  
Roberta Bosso-Martelo ◽  
Gisselle M. Chávez-Andrade ◽  
Juliane M. Guerreiro-Tanomaru ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Calcium Silicate ◽  
Setting Time ◽  
Repair Material ◽  
Alkaline Ph ◽  
Root Canal Sealer ◽  
Work Time ◽  
Lower Solubility ◽  
Low Solubility ◽  
One Way Anova

Differences in liquid-to-powder ratio can affect the properties of calcium silicate-based materials. This study assessed the influence of powder-to-gel ratio on physicochemical properties of NeoMTA Plus. Setting time (minutes), flow (mm and mm²), pH (at different periods), radiopacity (mm Al) and solubility (% mass loss) were evaluated using the consistencies for root repair material (NMTAP-RP; 3 scoops of powder to 2 drops of gel) and root canal sealer (NMTAP-SE; 3 scoops of powder to 3 drops of gel), in comparison to Biodentine cement (BIO) and TotalFill BC sealer (TFBC). Statistical analysis was performed using one-way ANOVA and Tukey tests (α=0.05). BIO had the shortest setting time, followed by NMTAP-RP and NMTAP-SE. TFBC showed the highest setting time and radiopacity. BIO, NMTAP-RP, and NMTAP-SE had similar radiopacity. All materials promoted an alkaline pH. NMTAP-RP/SE presented lower solubility than BIO and TFBC. Regarding the flow, TFBC had the highest values, followed by NMTAP-SE, and NMTAP-RP. BIO had the lowest flow. In conclusion, NMTAP in both powder-to-gel ratios showed high pH and low solubility. The increase in the powder ratio decreased the setting time and flow. These findings are important regarding the proper consistency and work time to clinical application.

scholarly journals Physicochemical Properties of Two Generations of MTA-Based Root Canal Sealers

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 5911
Author(s):  
Sawsan Abu Zeid ◽  
Hadeel Yaseen Edrees ◽  
Abeer Abdulaziz Mokeem Saleh ◽  
Osama S. Alothmani
Keyword(s):  
Surface Morphology ◽  
Film Thickness ◽  
Physicochemical Properties ◽  
Root Canal ◽  
Ion Release ◽  
Ph Change ◽  
Phosphate Ion ◽  
Two Generations ◽  
Root Canal Sealers ◽  
One Way Anova

This study evaluated the physicochemical properties and the effect of solubility on the surface morphology and composition of the root canal sealers MTA-Bioseal, MTA-Fillapex, and Adseal. Discs (n = 10) of freshly mixed sealer were prepared and then analyzed by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDX). The discs were immersed for 1, 7, 14, and 28 days in deionized water. The solubility %; pH change of the solution; and released calcium, phosphate, and silicon were measured for each period. The flowability and film thickness were also evaluated. Changes in the surface morphology and composition after 28 days of immersion were evaluated by SEM/EDX. The data were statistically analyzed by one-way ANOVA at p < 0.05. The FTIR and EDX results revealed similar compositions of MTA-Bioseal and MTA-Fillapex, but with different concentrations. The two MTA-based sealers had higher solution alkalinity (pH > 10) than Adseal (pH ≈ 8.5). MTA-Fillapex exhibited the highest solubility % and the largest calcium and silicon ion release. MTA-Bioseal had the highest phosphate ion release. After 28 days, the sealer surfaces showed large micropores, with larger pores in MTA-Fillapex. Adseal had an intermediate flowability but exhibited the greatest film thickness. Finally, the highest solubility and largest amount of silicon release was exhibited by MTA-Fillapex, which might predispose it to the development of large micropores, compromising the apical seal of obturation.

scholarly journals Physicochemical Properties of a Bioceramic Repair Material - BioMTA

2020 ◽  
Vol 31 (5) ◽  
pp. 511-515
Author(s):  
Hernán Coaguila-Llerena ◽  
Victor Manuel Ochoa-Rodriguez ◽  
Gabriela Mariana Castro-Núñez ◽  
Gisele Faria ◽  
Juliane Maria Guerreiro-Tanomaru ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Setting Time ◽  
The Other ◽  
Repair Material ◽  
Alkaline Ph ◽  
Initial Setting Time ◽  
Significant Difference ◽  
Initial Setting ◽  
One Way Anova ◽  
Alkaline Material

Abstract This study aimed to assess the physicochemical properties of a repair material in the Brazilian market, BioMTA, in comparison to other two materials currently in use (Biodentine and MTA Angelus). The initial setting time was evaluated using Gillmore needle. The pH was measured with a pH-meter after 24 h, 3, 7, 14 and 21 days. The radiopacity was determined using the equivalence in millimeters of aluminum (mm Al) from digitized occlusal radiographs. Solubility was determined after immersion in water for 7 days. The data were analyzed by one-way ANOVA and Tukey tests (a=0.05). The BioMTA initial setting time (5.2 min) was lower than the other materials (p<0.05). All materials showed an alkaline pH at 21 days. At 24 h, BioMTA was the most alkaline material (p<0.05); and at 3, 7, 14 and 21 days there was no difference between BioMTA and Biodentine (p>0.05), both being more alkaline than MTA Angelus (p<0.05). The radiopacity of BioMTA (4.2 mm Al) was significantly higher compared to Biodentine (p<0.05) and lower than MTA Angelus (p<0.05). The solubility of the materials was -4.2%, -1.6% and 4.1% for BioMTA, MTA Angelus and Biodentine, respectively, with a significant difference between them (p<0.05). Therefore, it can be concluded that BioMTA displayed a shorter setting time, an alkaline pH, a higher radiopacity, and a gain in mass.

Evaluation of the biological and physicochemical properties of calcium silicate‐based and epoxy resin‐based root canal sealers

2021 ◽  
Author(s):  
Gabriela Cardoso Ferreira ◽  
Lucas Siqueira Pinheiro ◽  
Júlia Silveira Nunes ◽  
Roberta Almeida Mendes ◽  
Cláudia Daniela Schuster ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Epoxy Resin ◽  
Root Canal ◽  
Calcium Silicate ◽  
Root Canal Sealers

scholarly journals Evaluation of the physicochemical properties of silicone- and epoxy resin-based root canal sealers

2017 ◽  
Vol 31 (0) ◽  
Author(s):  
Rafael Verardino de CAMARGO ◽  
Yara Terezinha Corrêa SILVA-SOUSA ◽  
Rodrigo Presotto Ferreira da ROSA ◽  
Jardel Francisco MAZZI-CHAVES ◽  
Fabiane Carneiro LOPES ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Epoxy Resin ◽  
Root Canal ◽  
Root Canal Sealers

scholarly journals Intensity of Soccer Players’ Training Load in Small-Sided Games with Different Number of Players

2020 ◽  
Vol 60 (1) ◽  
pp. 55-74
Author(s):  
Nikolas Nagy ◽  
Miroslav Holienka ◽  
Matej Babic ◽  
Jakub Michálek ◽  
Egon Kunzmann
Keyword(s):  
Heart Rate ◽  
Statistical Significance ◽  
Soccer Players ◽  
Special Software ◽  
Systematic Training ◽  
The Difference ◽  
The One ◽  
Post Hoc ◽  
Experimental Group ◽  
One Way Anova

SummaryThe main aim of this research was to compare differences in heart rate values (HR) of soccer players during small-sided games (SSGs) with different number of players. We assumed that the number of “neutral” player or players in small-sided games will significantly affect the intensity of SSGs and in this case the heart rate values of participating players. The experimental group consisted of older junior players from the FC DAC 1904 Dunajská Streda soccer club (n = 9). The heart rate values were evaluated on the basis of collected data, which we obtained using Polar sport testers and special software Polar Team2. In order to find out the statistical significance of the difference in heart rate was used the One-Way ANOVA and the Bonferroni post hoc test. The level of statistical significance we set at 5 %. We found out that with increasing number of “neutral” players’ the intensity of small-sided games gradually decreased. During SSG1 (3 vs. 3), we recorded the highest achieved average heart rate values of the monitored players, in average 171.33 ± 9.39 beats.min-1. This form of the SSGs was the most intense, but not statistically significant. Our recommendation is to employ SSGs in the systematic training process with different number of players, because we can adequately prepare the players for the match load itself. Attention need to be paid for the playing position requirements.

scholarly journals Generational motivation and preference for reward and recognition

2015 ◽  
Vol 4 (3) ◽  
pp. 259-270
Author(s):  
Donné Close ◽  
Nico Martins
Keyword(s):  
South African ◽  
Measuring Instruments ◽  
Reward Structure ◽  
Facilities Management ◽  
Flexible Approach ◽  
Different Types ◽  
The One ◽  
Reward And Recognition ◽  
Post Hoc ◽  
One Way Anova

Generation sub-groups have been and continue to be stereotyped as requiring different approaches in the workplace and elsewhere with regard to what keeps them motivated and satisfied. Two measuring instruments were distributed electronically to all staff of a South African Facilities Management firm. The one-way ANOVA was conducted with post-hoc tests to establish which factors display statistically significant differences between generations. The findings demonstrated that certain generation sub-groups have preferences for different types of reward, reward categories, and have different perceptions about what types of reward attracts, motivates and retains employees. The main recommendation is that the company needs to adopt a flexible approach to reward and recognition that allows employees to tailor their reward structure to their own needs.

scholarly journals CHARACTERISTICS OF FRUIT FERMENTATION OF ANNONA MONTANA FRUIT USING SACCHAROMYCES CEREVICIAE

2021 ◽  
Vol 4 (2) ◽  
pp. 99-111
Author(s):  
Ambar Fidya Sari
Keyword(s):  
Ph Value ◽  
Chemical Characteristic ◽  
Research Data ◽  
Total Acid ◽  
Three Stages ◽  
The One ◽  
Post Hoc ◽  
Physical And Chemical ◽  
The Impact ◽  
One Way Anova

Soursop mountain (Annona montana Macf) is a genus of Annonaceae, which contains metabolite compounds and antioxidant activity. Mountain soursop fermentation process is carried out with the addition of yeast Saccharomyces cereviciae which can convert carbohydrates into ethanol and organic acid.. The study is aimed at knowing the impact of the duration of the fermentation on the Soursop mountain on physical and chemical characteristics as a natural preservative. The study involves three stages, beginning with the production of mountain-source-juice, then fermentation, and testing of physical characteristics involving organoleptic (colour, aroma, taste, and texture), pH, and viscosity, whereas on the chemical characteristic that is total acid. Research data is analyzed by the One Way Anova method when there is a valid influence followed by the Post Hoc Tukey at real levels α=5%. Changes in physical and chemical grade values include organoleptic (yellow whiteness, aroma scent of the tape, a slightly thick liquid texture (soft) and no gloating, a very sour taste, a 3,86 pH value, a viscosity 583,33 cp, and a total acetate acid 0,4281%.Keywords: Annona Montana; fermentation ;Saccharomyces cereviciae

scholarly journals Influence of different kinds of rosins and hydrogenated resins on the setting time of Grossman cements

1999 ◽  
Vol 13 (1) ◽  
pp. 83-87 ◽  
Author(s):  
Manoel Damião SOUSA NETO ◽  
Luis Fernando GUIMARÃES ◽  
Danilo Mathias Zanello GUERISOLI ◽  
Paulo César SAQUY ◽  
Jesus Djalma PÉCORA
Keyword(s):  
Physicochemical Properties ◽  
Root Canal ◽  
Setting Time ◽  
Cement Powder ◽  
Root Canal Sealers

In this study, the effect on the setting time by the addition of different kinds of rosin and hydrogenated resin on the Grossman cement powder was evaluated. The experiments were carried out following the American Dental Association’s specification number 57 for root canal sealers. For this analysis, different Grossman cement powders were prepared using different rosins (X, WW and WG) and hydrogenated resins (Staybelite and Staybelite ester 10). The study of the physicochemical properties of the Grossman cements obtained the different kinds of rosins and hydrogenated resins interference on the cement’s setting time. The hydrogenated resin, having a higher pH, increased the setting time of the cement when compared to the X, WW and WG rosins.

scholarly journals The Effectiveness Of The Papaya Leaf Extract (Carica Papaya L) On The Growth Of Epidermidic Staphylococcus Bacteria

2020 ◽  
Vol 11 (1) ◽  
pp. 65
Author(s):  
Charles Manurung ◽  
Melysa Loeslim ◽  
Setia Budi Tarigan
Keyword(s):  
Staphylococcus Epidermidis ◽  
Leaf Extract ◽  
Sampling Method ◽  
Inhibition Zone ◽  
Inhibitory Zone ◽  
Positive Bacterium ◽  
Post Test ◽  
The One ◽  
Post Hoc ◽  
One Way Anova

This research was conducted to determine the effectiveness test of papaya leaf extract with a concentration of 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80% and 90% and 100% against staphylococcus epidermidis bacteria. Staphylococcus epidermidis is a gram-positive bacterium in the form of cocci and is harmful to humans. This research was conducted with an experimental method with a post-test only design and sampling with a purposive sampling method. The investigation of the effectiveness of papaya leaf extract against staphylococcus epidermidis was done by diffusion using paper discs, namely by calculating the diameter of the bacterial inhibition zone of paper discs that have been moistened with papaya leaf extract. The results of this study were analyzed out with the One-Way ANOVA test followed by the Post Hoc Test. The test showed that there were significant differences from each treatment given with a 95% confidence index. The bacteria treated with papaya leaf extract 100% against staphylococcus epidermidis had the highest average inhibitory zone power compared to other concentrations of 14.97 mm. The papaya leaf extract 100% has the best antibacterial effect compared to other concentrations because the best inhibitory zone power is found on those extract concentrations.

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