The properties of a glass ionomer cement

Kent, Brian E.; Lewis, B.; Wilson, Alan D.

doi:10.1038/sj.bdj.4803083

Cited by 147 publications

(52 citation statements)

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“…Conventional glass polyalkenoate cements (CGPCs), commonly referred to as the glass ionomer cements, were developed in the early 1970s at the laboratory of the Government Chemist in London, England [1]. These adhesive materials have been subjected to continuous improvement and diversification [2].…”

Section: Introductionmentioning

confidence: 99%

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

Alhalawani

Curran

Boyd

et al. 2015

Journal of Polymer Engineering

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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.

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Section: Introductionmentioning

confidence: 99%

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

Alhalawani

Curran

Boyd

et al. 2015

Journal of Polymer Engineering

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“…This findings may be attributed to the identical etch type [2] although SEP etch type is more superficial but merging etchant and the primer together increases adhesion by primer penetration to whole etched surface [2,36]. In contrast, a significant difference was found between RMGI and CC and this may be attributed to the difference in adhesion mechanism which is micromechanical in CC resulting from acid etching in addition to the complete polymerization of the resin [36], while its chemical in RMGI resulting from the ion interplay between polymer acid and enamel calcium [8,37,38].…”

Section: Discussionmentioning

confidence: 99%

Effectiveness of Using Self Etching Primer and Resin Modified Glass Ionomer on Bonding Orthodontic Brackets – an in Vitro Study

Dandachli¹

2016

Dent. Med. Probl.

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Many theories have been proposed to explain adhesion mechanism between brackets and enamel surface. Chemical and mechanical adhesion are the main types [1]. Conventional bonding methods use phosphoric acid to prepare the enamel surface before bonding, increasing its capability to the adhesion by creating micro pores on the surface [2][3][4]. Although this technique increases bond strength, it is a multi stages method [5] and needs stern isolation procedures, as moisture weakens the bond strength [6]. Several studies were made to decrease the disadvantages of using phosphoric AbstractBackground. Many adhesive systems have been investigated as alternatives to conventional bonding methods. Selfetching primers and resin modified glass ionomer cement have been introduced to overcome the disadvantages of acid etching Objectives. To assess the effect of using either a self etching primer (SEP) or a resin modified glass ionomer (RMGI) on shear bond strength and failure type in comparison with conventional methods (CM). Material and Methods. Eighty metal brackets were bonded to buccal surfaces of human upper premolars by the same clinician according to 1of 4 protocols. Group 1, Transbond XT was used with self-etching primer (SEP) Transbond Plus (3M Untiek, Monrovia, Calif). Group 2, resin modified glass ionomer (RMGI) Fuji Ortho LC (GC Crop, Japan). Group 3, light cure resin (LC) Transbond XT (3M Unitek, Monrovia, Calif) were used with 37% phosphoric acid. Group 4, Chemically cure resin (CC) Unite (3M Unitek, Monrovia, Calif) were used with 37% phosphoric acid. The premolars were stored in distilled water for 24 hours at 4ºC. Brackets were loaded to failure in Instron machine. Descriptive statistics were calculated. ANOVA, Bonferroni, Kruskal-Wallis tests and MannWhitney U were used. Results. The present study indicated that the SEP provided no significantly higher shear bond (10.01 ± 5.46 MPa) than LC adhesive (8.59 ± 4.07 MPa) while RMGI showed the lowest (5.08 MPa). A comparison of the adhesive remnant index (ARI) scores indicated that there was significantly difference between the groups with less residual adhesive remaining on the teeth with SEP and RMGI. Conclusions. SEP produced bond strength clinically accepted with less amount of residual adhesive left on the enamel while RMGI produced unacceptable bond strength. SEP can use successfully in bond orthodontic brackets (Dent. Med. Probl. 2016, 53, 1, 50-55).

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“…Compared to other luting cements, glass ionomer cement has strong disintegration 23) . It has been suggested that water sensitivity at the initial stages of curing causes disintegration of the water contact surface matrix, resulting in the loss of unreacted glass particles in the core 24) .…”

Section: Discussionmentioning

confidence: 99%

Ultraphosphate, a potent stain control agent that is effective for both stain removal and prevention of stain deposition

Koyasu¹,

Shiba²,

Kawazoe³

et al. 2014

Dent. Mater. J.

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Polyphosphate is a phosphate polymer which is effective for stain removal and prevention of stain deposition. Ultraphosphate belongs to the polyphosphate group and has a highly branched mesh-like structure. To evaluate stain control ability of ultraphosphate, we used HAP powder, glass-ionomer cement and detached human teeth for models of in vitro stain control experiments. When using HAP powder, the stain removal ability of ultraphosphate was the highest among common chelating agents. In addition, ultraphosphate efficiently removed stain and prevented stain deposition on glass-ionomer cement at 20°C and 37°C. Finally, ultraphosphate removed coffee stain from human teeth surface efficiently and the color difference (ΔE*ab) before and after ultraphosphate treatment was changed dramatically from 59.4 to 8.3. Similarly, the ΔE*ab value of human teeth treated with ultraphosphate before coffee treatment was only 9.9, while the value without ultraphosphate pre-treatment was 21.2. These results indicate that ultraphosphate is a potent agent for stain control.

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The properties of a glass ionomer cement

Cited by 147 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

Effectiveness of Using Self Etching Primer and Resin Modified Glass Ionomer on Bonding Orthodontic Brackets – an in Vitro Study

Ultraphosphate, a potent stain control agent that is effective for both stain removal and prevention of stain deposition

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