scholarly journals The effect of combined application of new dentin desensitizing agent and deproteinization on dentin permeability of different adhesive systems

2013 ◽  
Vol 10 (3) ◽  
pp. 138-144 ◽  
Author(s):  
N.S. Farghal ◽  
A.I. Abdalla ◽  
S.M. El-Shabrawy ◽  
E.A. Showaib
Keyword(s):  
Adhesive Systems ◽  
Dentin Permeability ◽  
Combined Application

Physicochemical characterization, water sorption and solubility of adhesive systems incorporated with titanium tetrafluoride, and its influence on dentin permeability

2021 ◽  
Vol 119 ◽  
pp. 104453
Author(s):  
Ruthinea Faria de Moraes Cardoso ◽  
Rosanna Tarkany Basting ◽  
Fabiana Mantovani Gomes França ◽  
Flávia Lucisano Botelho do Amaral ◽  
Roberta Tarkany Basting
Keyword(s):  
Water Sorption ◽  
Physicochemical Characterization ◽  
Adhesive Systems ◽  
Titanium Tetrafluoride ◽  
Dentin Permeability

Dentin Permeability and Nanoleakage of Universal Adhesives in Etch-and-rinse vs Self-etch Modes

2021 ◽  
Author(s):  
JMMS Cruz ◽  
ALGBM Silva ◽  
RMRF Eira ◽  
BMPR Sousa ◽  
MMN Lopes ◽  
...  
Keyword(s):  
Adhesive System ◽  
Third Molars ◽  
Adhesive Systems ◽  
Dentin Permeability ◽  
Transmission Electron ◽  
Mode Of Application ◽  
Etch And Rinse ◽  
Universal Adhesives ◽  
Self Etch ◽  
Ammoniacal Silver

Clinical Relevance Universal adhesives do not seem to have the ability to effectively seal dentin, regardless of the mode of application. SUMMARY Purpose: This study evaluates the reduction in dentin permeability (P) and the expression of nanoleakage in resin-dentin interfaces made with universal adhesives, comparing the self-etch mode of application with the etch-and-rinse mode of application. Methods and Materials: To measure dentin P at the baseline and after adhesive polymerization, 80 extracted noncarious human third molars (N=80) were sectioned to obtain 0.7-mm-thick midcoronal dentin disks. The specimens were randomly assigned to 8 groups according to the different adhesive systems and application modes used: Scotchbond Universal (SBU; etch-and-rinse [ER] mode vs self-etch [SE] mode), OptiBond XTR (OPT; etch-and-rinse mode vs self-etch mode), Clearfil Universal Bond Quick (CL; etch-and-rinse mode vs self-etch mode), and Adhese Universal (ADH; etch-and-rinse mode vs self-etch mode). A two-way analysis of variance with interaction was used to evaluate the P reduction differences among the groups (α=0.05). Sixteen additional 0.7-mm-thick dentin disks were similarly prepared and treated, immersed in 50 wt% ammoniacal silver nitrate, and then processed according to conventional methods for analysis under transmission electron microscopy. Results: The differences in P reduction among the adhesives were significant (p=0.029). For OPT and ADH (p=0.0304 and p=0.0120, respectively), the P reduction was higher in the ER mode than in the SE mode. For CL and SBU, no differences in P reduction was observed between the two application modes (p>0.05). All the groups showed some pattern of nanoleakage. Conclusions: No adhesive system completely reduced dentin P. Dentin sealing was higher for OPT and ADH in the ER mode, while for SBU and CL, there was no difference between the two modes. All the adhesive systems showed nanoleakage.

scholarly journals Assessment of permeability of eroded dentin after the use of universal, self-etch, and conventional systems

2021 ◽  
Vol 34 (1) ◽  
pp. 10-17
Author(s):  
Fábia Roma ◽  
Karla Penha ◽  
Carlos Torres ◽  
Etevaldo Maia-Filho ◽  
Leily Firoozmand
Keyword(s):  
In Vitro Study ◽  
Dentin Hypersensitivity ◽  
Single Bond ◽  
Adhesive Systems ◽  
Universal Adhesive ◽  
Dentin Permeability ◽  
Before And After ◽  
Adhesive Application ◽  
Conventional Systems

Dentin hypersensitivity is caused by increased dentinal permeability due to total or partial exposure of dentinal tubules, which in turn can be produced by alterations of dental structures or failure of restorative procedures. The purpose of this in vitro study was to evaluate the efficacy of the application of different kinds of adhesive systems to prevent dentin permeability before and after an erosive challenge. Fifty bovine dentin discs (6x1 mm) were prepared and the specimens were divided into 5 groups (n=10): (SB2) Single Bond 2, (SBU) Universal Single Bond, (CSB) Clearfil SE Bond, (SM) Scotchbond Multipurpose and (C) Control. Hydraulic conductance of dentin was recorded after adhesive application (HC-1) and after erosive challenge (HC-2). Dentin surface images of post-treatment and post-erosive challenge were obtained by scanning electron microscopy (SEM). Data were analyzed using Kruskal Wallis, Mann-Whitney with Bonferroni correction and Wilcoxon tests (p<0.05). Reduction in dentin permeability was observed with the application of adhesive systems (p<0.05). After the erosive challenge, dentin permeability increased for SBU and CSB (p<0.05), while SB2 and SM did not differ in HC-1 or HC-2 (p>0.05). The conventional, self-etching and universal adhesive systems reduce dentinal permeability by more than 80%, and dentin demineralization may contribute to the increased permeability of universal and self-etching systems.

Effectiveness of nitrogen and bio-fertilizer choice for improving growth and yield of hybrid rice (Oryza sativa L.) during dry season

2020 ◽  
Vol 57 (4) ◽  
pp. 302-309
Author(s):  
Sukanta Pal ◽  
Megha Sana ◽  
Hirak Banerjee ◽  
Lhingneikim Lhungdim
Keyword(s):  
Yield Components ◽  
Hybrid Rice ◽  
Growth Parameters ◽  
Oryza Sativa L ◽  
Block Design ◽  
Growth And Yield ◽  
Combined Application ◽  
Randomized Block Design ◽  
N Dose ◽  
Dry Seasons

Effect of nitrogen and bio-fertilizer on growth and productivity of hybrid rice (cv. PHB 71) was assessed during dry seasons of 2017 and 2018 at Research Farm of BCKV under new alluvial zone of West Bengal. The experiment was laid out in factorial randomized block design with 12 treatment combinations having 4 levels of N and 3 types of bio-fertilizer replicated thrice. Application at 180 kg N/ha produced tallest plants at 90 DAT with maximum LAI (60 DAT), DMA (90 DAT), tillers/hill (90 DAT) and CGR (30-60 & 60-90 DAT). The same N rate resulted in highest panicles/m2, panicle length, panicle weight, filled grains/panicle and 1000-grain weight. A decrease in N dose from 180 to 150 kg/ha caused reduction in all those yield components; however, the variation was non-significant except for number of panicles/m2. Maximum grain yield, straw yield and harvest index was also achieved with 180 kg N/ha accounting 120.1, 34.9 and 32.8% more than the values obtained with zero-N; however, it was statistically at par with the yields and HI obtained with 150 kg N/ha. The Azospirillum application increased all the growth parameters, yield components and yield of hybrid rice over other tested bio-fertilizers (Azospirillum > PSB > K mobilizer), accounting 5.9 and 8.8% more than the yields obtained with PSB and K mobilizer. The interaction of N and bio-fertilizer exerted significant effect on growth attributes but failed to record any significant variations in yield components and yield of hybrid rice. The maximum economic benefit was achieved with combined application of 180 kg N/ha and Azospirillum.

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