Quantifying effects of interactions between polyacrylic acid and chlorhexidine in dicalcium phosphate – forming cements

Abstract

Polyacrylic acid has been shown to control setting and improve mechanical and antibacterial release properties of brushite bone cements.

Hyperbranched Polyethylenimine-Tethered Multiple Emulsion-Templated Hierarchically Macroporous Poly(acrylic acid)–Al2O3 Nanocomposite Beads for Water Purification

“…30,32,33 Likewise, the shift of a peak from 840 cm −1 associated with the polyacrylate groups in PAA−AO to 797 cm −1 in PAA−AO−PEI also supports some sorts of interaction between PAA and PEI. 34 The chemical composition and surface modification of AO, PAA−AO, and PAA−AO−PEI NC were further substantiated by XPS analysis. The survey scan (Figure 3B 35,36 The deconvoluted high-resolution O 1s spectra of AO (Figure S1C), PAA−AO (Figure S1D), and PAA−AO−PEI NC (Figure 4B) show bands at 529.54 ± 0.36 4C).…”

“…The disappearance of a characteristic peak of AO NPs at 556 cm –1 in PAA–AO and PAA–AO–PEI NCs clearly suggests the interaction of AO NPs and their possible coating with PAA. The FTIR spectrum of PAA–AO NC beads shows two very weak signals centered at 2918 and 2848 cm –1 that are related to the asymmetric stretching (ν as ) and symmetric stretching (ν s ) modes of CH 2 , respectively, ,,, which become somewhat prominent after functionalization and are shifted to 2921 and 2867 cm –1 due to the asymmetric and symmetric CH 2 stretches of PEI chains. , A very strong band around 1700 cm –1 and a shoulder at 1222 cm –1 arising from the CO and C–N stretching vibrations of amide I and amide II bands, respectively, are indicative of the coupling of carboxylic acid and amine groups of PAA and PEI, respectively. , The disappearance of the asymmetric stretching vibrations of −COO – groups of PAA at 1390 cm –1 and the appearance of a N–H bond signal at 939 cm –1 in the PAA–AO–PEI spectrum also provide obvious clues for the interaction of PAA and PEI. ,, Likewise, the shift of a peak from 840 cm –1 associated with the polyacrylate groups in PAA–AO to 797 cm –1 in PAA–AO–PEI also supports some sorts of interaction between PAA and PEI …”

Characterization of Dentine to Assess Bond Strength of Dental Composites

“…Weibull parameters were calculated from the slope and intercept of the left hand side of Equation (6) plotted vs. ln σ [ 51 ].…”

Threats to adhesive/dentin interfacial integrity and next generation bio‐enabled multifunctional adhesives

“…Recurrent decay remains the primary reason for replacing composite restorations and is a key driver of the ongoing quest to develop restorative materials with antibacterial properties . Chlorhexidine, fluoride, and silver ions are among the antimicrobial agents incorporated in dental materials . These agents generally achieve their antimicrobial activity through gradual release, an approach that can lead to inconsistent dosage, short‐term effectiveness, decreased mechanical properties, and toxicity to host tissues …”