Characterisation of the ultrastructure of glass-ionomer (poly-alkenoate) cement

Hatton, Paul V.; Brook, I.M.

doi:10.1038/sj.bdj.4808026

Cited by 86 publications

(28 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Meanwhile, they attributed the hardening reaction to the silica component which leached from the glass powder and formed a hydrated silicate in the matrix [34,35]. These results were supported by Cattani-Lorente et al [47] and Hatton and Brook [48], who concluded that the strengthening of CGPCs during maturation resulted from additional cross-linking and the development of a silica gel phase. It is presumed that restricted chain pullout and increased cross-linking are the most likely causes of increased strength while the inorganic phase acts as a reinforcing phase in the strength of CGPCs [2,31].…”

Section: The Role Of Paa During Cgpc Maturationsupporting

confidence: 78%

See 1 more Smart Citation

The role of poly(acrylic acid) in conventional glass polyalkenoate cements

Alhalawani

Curran

Boyd

et al. 2015

Journal of Polymer Engineering

View full text Add to dashboard Cite

Abstract Glass polyalkenoate cements (GPCs) have been used in dentistry for over 40 years. These novel bioactive materials are the result of a reaction between a finely ground glass (base) and a polymer (acid), usually poly(acrylic acid) (PAA), in the presence of water. This article reviews the types of PAA used as reagents (including how they vary by molar mass, molecular weight, concentration, polydispersity and content) and the way that they control the properties of the conventional GPCs (CGPCs) formulated from them. The article also considers the effect of PAA on the clinical performance of CGPCs, including biocompatibility, rheological and mechanical properties, adhesion, ion release, acid erosion and clinical durability. The review has critically evaluated the literature and clarified the role that the polyacid component of CGPCs plays in setting and maturation. This review will lead to an improved understanding of the chemistry and properties of the PAA phase which will lead to further innovation in the glass-based cements field.

show abstract

Section: The Role Of Paa During Cgpc Maturationsupporting

confidence: 78%

“…PAA concentration < 38% w/w resulted in no effects on the P:L ratio. Working time [38][39][40][41][42][43][44][45][46][47][48][49][50] Within this active region, increasing the PAA concentration decreased the working time. This corresponds to the increased viscosity of the cement.…”

Section: Active Region Commentmentioning

confidence: 99%

The role of poly(acrylic acid) in conventional glass polyalkenoate cements

Alhalawani

Curran

Boyd

et al. 2015

Journal of Polymer Engineering

View full text Add to dashboard Cite

show abstract

“…Firstly, during setting a marked exothermic reaction occurs that may result in thermal damage to the surrounding tissues [5] and second, the release of methyl methacrylate monomer into the tissues may cause chemical necrosis [6]. A novel group of ionomeric cements (ICs) based on a neutralization reaction between aluminosilicate glass and organic polyalkenoic acid are being developed for use as bone cements [1,3,7]. Preliminary trials using ICs for the reconstruction of the middle ear [1,3,8] and for the repair of craniofacial defects [9] have suggested that these cements have few side effects.…”

Section: Introductionmentioning

confidence: 99%

The immediate effects of ionomeric and acrylic bone cements on peripheral nerve function

Loescher

Robinson

Brook

1994

J Mater Sci: Mater Med

View full text Add to dashboard Cite

A total of 44 rat saphenous nerves were isolated. A pair of stimulating electrodes was positioned distally (at the ankle) to evoke a compound action potential (CAP) which was recorded proximally (in the thigh) through another pair of electrodes. Bone cement was then placed adjacent to the nerve midway between the electrodes and changes in the CAP recorded over a 30-min period. Nerve conduction was completely blocked within 2 min of placing unset acrylic bone cement adjacent to the nerve. The experimental ionomeric cements (IC) also caused a reduction in the nerve conduction although this did not usually occur until the cement had been positioned adjacent to the nerve for over 10 min. Slow-setting IC blocked nerve conduction more quickly than fast-setting IC but there was no apparant difference between the effects of applying materials early or late in the setting reaction. Set ionomeric porous microimplant particles (Ionogran®) had no effect on neural function.

show abstract

“…Formation of these carboxylate salts might be faster in the water-containing allin-one adhesive investigated, due to the better ionization of 4-AET. Based on the morphological manifestation of a siliceous hydrogel layer around the periphery of FASG fillers, it was indisputable that a GI-type acid-base reaction occurred between the acidic resin monomers and glass fillers 89) . The presence of a surface interaction layer on top of a partially demineralized zone along the resin-dentin interface suggested that either a GI-type reaction or precipitation of insoluble carboxylate salts around remnant apatite crystallites could have occurred when this single-step adhesive interacted with dentin.…”

Section: Ultramorphological Characterization Of the Resindentin Intermentioning

confidence: 99%

A Review of Chemical-approach and Ultramorphological Studies on the Development of Fluoride-releasing Dental Adhesives Comprising New Pre-Reacted Glass Ionomer (PRG) Fillers

et al. 2008

View full text Add to dashboard Cite

This paper reviews our recent studies on fluoride-releasing adhesives and the related studies in this field based on information from original research papers, reviews, and patent literatures. A revolutionary PRG (pre-reacted glass ionomer) filler technology -where fillers were prepared by the acid-base reaction of a fluoroaluminosilicate glass with polyalkenoic acid in water, was newly developed, and a new category as "Giomer" was introduced into the market. On fluoride release capability, SIMS examination revealed in vitro fluoride ion uptake by dentin substrate from the PRG fillers in dental adhesive. On bonding durability, it was found that the improved durability of resin-dentin bonds might be achieved not only via the strengthened dentin due to fluoride ion uptake from the PRG-Ca fillers, but also due to retention of relatively insoluble 4-AETCa formed around remnant apatite crystallites within the hybrid layer in 4-AET-containing self-etching adhesives. On ultramorphological study of the resin-dentin interface, TEM images of the PRG-Ca fillers revealed that the dehydrated hydrogel was barely distinguishable from normal glass fillers, if not for the concurrent presence of remnant, incompletely reacted glass cores. In conclusion, it was expected that uptake of fluoride ions with cariostatic effect from PRG-Ca fillers would endow dentin substrates with the benefit of secondary caries prevention, together with an effective and durable adhesion to dentin. Key words: Pre-reacted glass ionomer (PRG) technology, Giomer, Fluoride-releasing adhesiveReceived May 30, 2007: Accepted Nov 2, 2007 In 1955, Dr. Michael Buonocore 1) first demonstrated the bonding of acrylic resin to etched enamel. This success has since opened a new vista in the field of adhesive dentistry, and so-called acid-etching technique is ubiquitous in today's dental clinics. The field of adhesive dentistry has made a significant progress over the past decade. A large part of this success is attributed to the major advances in a bonding technology 2) . On dental adhesives, most of the developed products are biologically evaluated by means of in vivo histopathological studies and clinical trial investigations. INTRODUCTIONResults obtained thus far, when measured against stringent clinical demands, point to the need for further research and improvement. The ultimate goal in the design and development of dental adhesives is to render a material that is relatively easy to apply, less technique-sensitive, and which inhibits the formation of secondary caries. To achieve these targets through the development of more advanced adhesives, numerous challenges have been continuously performed by rigorous chemical-approach studies with the aim of tackling research problems and speculations that are regularly encountered in the course of exploration and development. In addition, to understand the mechanism of adhesion to dental hard tissues or its degradation at the resin-dentin interface, numerous ultramorphological studies are undertaken, and made valuable ...

show abstract

Characterisation of the ultrastructure of glass-ionomer (poly-alkenoate) cement

Cited by 86 publications

References 0 publications

The role of poly(acrylic acid) in conventional glass polyalkenoate cements

The role of poly(acrylic acid) in conventional glass polyalkenoate cements

The immediate effects of ionomeric and acrylic bone cements on peripheral nerve function

A Review of Chemical-approach and Ultramorphological Studies on the Development of Fluoride-releasing Dental Adhesives Comprising New Pre-Reacted Glass Ionomer (PRG) Fillers

Contact Info

Product

Resources

About