Chiari, Marina D. S. published the artcileExperimental dentin adhesives containing calcium orthophosphate particles: Effect on dentin bond strength, micro-permeability and collagen degradation, Application of Ethyl 4-dimethylaminobenzoate, the publication is International Journal of Adhesion and Adhesives (2021), 102828, database is CAplus.
To assess the effect of dicalcium phosphate dihydrate (DCPD) or mineral trioxide aggregate (MTA) particles on the microtensile bond strength (ΜTBS), micro-permeability and enzymic activity at the adhesive-dentin interface of exptl. dental adhesives. An exptl. ethanol-based, two-step etch-and-rinse adhesive system was prepared Four exptl. groups were tested, based on the type of particle added: (1) DCPD functionalized with diethylene glycol dimethacrylate (DCPD_DEGDMA), (2) citric acid (DCPD_CA), (3) calcium silicate (MTA) and (4) unfilled (control). All particles were added at 10 wt%. Human third molars had their occlusal enamel removed and dentin surface polished. After acid etching, the adhesives were applied on the dentin surfaces and the teeth were restored with a com. nanofilled resin composite. The μTBS and micro-permeability were tested after 24 h or 2 mo of storage in simulated body fluid (SBF) at 37°C. Bonded interfaces were observed using scanning electron microcopy (SEM). Gelatinolytic activity at the adhesive interfaces was assessed by in situ zymog. at 24 h and 2 mo in SBF/37°C. The results were described as relative florescent units (RFU). μTBS data were analyzed by ANOVA/Games-Howell test. Data from micro-permeability and in situ zymog. were analyzed by Kruskal-Wallis/Mann-Whitney test (alpha: 5%). Differences in μTBS were found among adhesives (control = MTA > DCPD_CA > DCPD_DEGDMA, p < 0.001), but not between storage times. The control group showed the lowest permeability at both observation periods. Except for DCPD_CA, no significant increases in micro-permeability were observed after 2 mo. All groups presented significant reductions in RFU values between 24 h and 2 mo. DCPD_DEGDMA (at 24 h) and MTA (at 2 mo) presented statistically lower RFU than the control (p < 0.01). Evidence of reduced MMP activity was observed at adhesive interfaces with the use of exptl. adhesives containing calcium-releasing particles. However, after two months, bond strength and micro-permeability results suggest that interfacial stability was not affected by adhesive formulation.
International Journal of Adhesion and Adhesives published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Application of Ethyl 4-dimethylaminobenzoate.
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https://en.wikipedia.org/wiki/Ester,
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