Reactions in Glass Ionomer Cements: II. An Infrared Spectroscopic Study

Crisp, Stephen; Pringuer, Martin A.; Wardleworth, Dion; Wilson, Alan D.

doi:10.1177/00220345740530062001

Cited by 143 publications

(44 citation statements)

References 6 publications

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“…Also in the region of 1540-1630cm [39] , indicating that in this case both Ca 2+ and Sr 2+ are the prominent crosslinking ions during the setting reaction. Previous studies by Nicholson et al reported Ca-PAA complexes in the region of 1550cm -1 when studying the effect of (+)-tartaric acid on GPCs [28] , and earlier studies by Crisp et al also found Ca-PAA complexes in the region of 1560cm -1 [40] . It is also evident that there is no shift in wavenumber over time suggesting that the cements have a final set within 24 hours, which agrees with mechanical properties.…”

Section: Resultsmentioning

confidence: 86%

A spectroscopic investigation into the setting and mechanical properties of titanium containing glass polyalkenoate cements

Wren

Kidari

Cummins

et al. 2010

J Mater Sci: Mater Med

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Titanium (Ti) implants are extensively used in a number of biomedical and dental applications.This work introduces Ti into the glass phase of a zinc based Glass Polyalkenoate Cement (GPC) and investigates changes in handling and mechanical properties considering two molecular weight polyacrylic acids (PAA), E9 and E11. Considering the handling properties, the working time (T w ) increased from 50s E9 , 32s E11 (BT 101, Ti-free) to 169s E9 , 74s E11 with TW-Z (highest Ti content) respectively. The setting time (T s ) increased from 76s E9 , 47s E11 (BT 101) to 303s E9 , 232s E11 with TW-Z respectively. Ti was also found to have a significant increase on both compressive (σ c ) and biaxial flexural strength (σ f ), where σ c increased from 36 MPa E9 , 56 MPa

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Section: Resultsmentioning

confidence: 86%

A spectroscopic investigation into the setting and mechanical properties of titanium containing glass polyalkenoate cements

Wren

Kidari

Cummins

et al. 2010

J Mater Sci: Mater Med

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“…6 Although the ability of a material to set in the dark can be used as a test to determine the occurrence of an acid-base reaction, such a test cannot be conclusive in the presence of chemical initiators. 15 Previous FT-IR studies of glass ionomer cements have been performed using attenuated total reflectance spectroscopy (ATR) 7,8 or micro FTIR experiments. 9 The ATR experiments have mainly been employed for short-term studies of complex formation in conventional glass ionomer cements, and would be less suitable for longer-term studies, because dehydration of the cement would inevitably occur if the cement remained in dry conditions for a long period of time.…”

Section: Discussionmentioning

confidence: 99%

Acid-base complex reactions in resin-modified and conventional glass ionomer cements

Wan

Yap

Hastings

1999

J. Biomed. Mater. Res.

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Resin-modified glass ionomer cements are a recent development in which the desirable properties of glass ionomer cements and resin-composites are combined. The presence of resin may, however, retard the acid-base reaction of the ionomer component. This has led to a debate regarding the classification of resin modified materials as true glass ionomer cements, and the actual duration of the acid-base reaction after initial setting via light polymerization has taken place. To investigate this issue, a novel method employing FT-IR spectrophotometry was used to monitor the acid-base complexation reaction in a resin-modified glass ionomer cement (Fuji II LC) and a conventional, chemically cured cement (Fuji II Cap). This method involved subtraction of the background "resin" spectrum from the Fuji II LC spectra and subsequent application of a baseline to obtain the plot of absorbance area ratio in the range of 1685 to 1510 cm(-1) (complexed carboxyls) to that in the range of 1750 to 1685 cm(-1) (free carboxyls). This study demonstrates evidence of a delayed acid-base reaction for the resin-modified cement, which levels off after 168 hours of cement mixing. In contrast, the complexation reaction of the conventional glass ionomer cement was essentially complete after 24 hours.

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“…There is considerable debate and controversy over various aspects of the setting reaction, including whether the setting reaction continues with time and how both the silica gel phase and polysalt phase affect the long term mechanical properties [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

A long-term study on the setting reaction of glass ionomer cements by 27Al MAS-NMR spectroscopy

Zainuddin¹,

Karpukhina²,

Hill³

et al. 2009

Dental Materials

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Objectives. The main objective is the characterization of the setting reaction in glass ionomer cements (GICs) based on experimental glasses using the 27 Al magic angle spinning nuclear magnetic resonance (MAS-NMR) spectroscopy in order to understand the crosslinking process during the setting reaction.Methods. Three types of GICs which are based on fluoro-alumino-silicate glasses (LG125, ART10, and LG26Sr) were studied using 27 Al MAS-NMR to monitor the setting reaction of the cements.Results. The result showed clearly the formation of six coordinate, aluminium Al(VI), that crosslink the carboxyl groups in the PAA. The deconvolution study was performed to quantify the amount of each Al species in the cements. The finding showed that composition of original glass has a substantial effect on the setting behavior of the cements.Significance. Our data demonstrate that the setting reaction of GICs can be followed by 27 Al MAS-NMR spectroscopy discovering the conversion of Al(IV) to Al(VI). Considerable amount of the five coordinate aluminium, Al(V), species was found in the cements aged up to one year. The presence of phosphorus has a strong influence on the setting reaction. The formation of Al-O-P species was postulated to be present in the cement.

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Reactions in Glass Ionomer Cements: II. An Infrared Spectroscopic Study

Cited by 143 publications

References 6 publications

A spectroscopic investigation into the setting and mechanical properties of titanium containing glass polyalkenoate cements

A spectroscopic investigation into the setting and mechanical properties of titanium containing glass polyalkenoate cements

Acid-base complex reactions in resin-modified and conventional glass ionomer cements

A long-term study on the setting reaction of glass ionomer cements by 27Al MAS-NMR spectroscopy

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