Levels of mutans streptococci and lactobacilli in plaque on aged restorations of an ion-releasing and a universal hybrid composite resin

Abstract

The purpose of this in vivo study was to evaluate the cariogenic microflora of plaque on aged restorations of a hydroxyl, fluoride, and calcium ion-releasing composite resin (IRCR) (Ariston pHc), and to compare it intra-individually with a universal hybrid composite resin and enamel. Each of 19 subjects received one proximal restoration of the IRCR, one proximal universal hybrid composite resin restoration (CR) and each subject had one non-filled proximal enamel control surface to make intra-individual comparisons possible. To avoid peak ion releases from the materials, aged restorations were studied. Plaque was collected from 57 surfaces using sterile applicator tips. Samples were cultured to determine the numbers of mutans streptococci, lactobacilli, and total microorganisms. The relative numbers for mutans streptococci (% of total bacteria) were: IRCR 0.59%, CR 0.40%, enamel 0.22%. Two outliers were found in the IRCR group. Excluding these outliers resulted in a relative number of 0.33%. Lactobacilli were detected in the plaque from only 9 surfaces and at very low relative proportions for all three surfaces: 0.01%. The enamel surfaces showed the lowest relative numbers of mutans streptococci and lactobacilli, but the differences were not significant. It can be concluded that the ion release of the IRCR did not influence the growth of cariogenic microorganisms in dental plaque.

Profiling of dental plaque biofilm on first molars with orthodontic bands and brackets

“…The mean bacterial numbers (logCFUs/mg) were 6.6, 6.7, and 6.9 from Ba, Br, and C, respectively, indicating that there were no significant differences among Ba, Br, and C. These findings were in accordance with a previous study by Persson et al [3] that there were no differences in the bacterial amounts of plaque on different surfaces, that is, enamel and composite resin. Actinomyces (44 and 40%), Streptococcus (24 and 35%), and Veillonella (9 and 10%) were predominant in Br and C, respectively, in accordance with a previous study by Hoshino et al [4], which reported the composition of plaque on the enamel, while the proportions of Actinomyces (18%) and Veillonella (2%) were low in Ba.…”

The potential factors affecting the perception of aesthetic smile among adult patients attending Dental clinics of Jazan University

“…Srednja vrednost površinske hrapavosti ispitivanog kompozitnog materijala bila je Ry=1,28, što je najmanja izmerena vrednost u odnosu na druge ispitivane materijale. Literaturni podaci su pokazali da kompozitne restauracije akumuliraju više plaka u odnosu na druge vrste stomatoloških materijala [18][19][20][21] . Nepotpuna obrada i konsekutivna hrapavost kompozitnih materijala značajno doprinose nakupljanju biofilma na površini kompozita 22,23 .…”

“…The mean of the surface roughness of the tested composite material was Ry = 1.28, which is the lowest measured value compared to the other tested materials. Literature data have shown that composite restorations accumulate more plaque than other types of dental materials [18][19][20][21] . Incomplete processing and consecutive roughness of composite materials significantly contribute to the biofilm accumulation on the composite surface 22,23 .…”

Activity, Reduced Toxicity, and Scale-Up Synthesis of Amphotericin B-Conjugated Polysaccharide

“…Numerous studies have reported that AMB formulations are more effective against fungal growth compared with other antifungal agents. − Grafting of AMB on the backbone of a natural polysaccharide is one of the strategies for drug delivery resulting in a water-soluble, relatively nontoxic, biodegradable and biocompatible conjugate. , In addition, conjugation of AMB on polysaccharides was conducted in aqueous solutions at room temperature, avoiding use of toxic organic solvents. Optimization of synthesis conditions for a pilot scale conjugation comprises challenges related to the scaling up process.…”