Studies on electrical and thermal properties of dental glass ionomer cement

Babu, T. Anil; Ramesh, K. V.; Sastry, D.L.

doi:10.4236/jbise.2012.511078

Cited by 7 publications

(3 citation statements)

References 13 publications

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“…According to our results, working length measurements obtained in teeth with proximal class II cavities restored with Chemfil Superior, showed the highest inconsistency among all. Glass ionomer cements present particular electric characteristics that vary throughout the setting process, getting stable up to 5 days after mixing (Villat et al, 2010;Babu et al, 2012). Babu et al studied the dielectric and thermal properties of these materials and found that under 80°C this material behaves as a conductor and polar substance.…”

Section: Discussionmentioning

confidence: 99%

Effect of Materials For Interim Restoration on Estimation of Working Length Using Electronic Apex Locator: in vitro Study

Ortega¹,

Romero²,

Echeverri³

et al. 2021

Int. J. Odontostomat.

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The aim of this in vitro study was to evaluate measurement accordance using an electronic apex locator for estimation of working length in endodontics when different restorative materials for interim crown restoration are utilized. For this study, 13 single-rooted premolars with endodontic occlusal access cavity were prepared. To establish the working length of each tooth, these were mounted in alginate and with the help of an electronic foramen locator and endodontic file K-file # 15, the working length was established. This length was later compared to the estimated working lengths using different intermediate restoration materials. These materials were: Superior Chemfil, Ketac ™ Molar Easymix and Filtek z350 resin. In the electronic measurements, an acceptable tolerance range of variation up to ± 0.5 mm was considered. Highest discrepancies were considered erroneous. For these measurements, central tendency and dispersion were analyzed. The Bland-Altman method was used, and the ANOVA test with a significance level of p <0,05 for statistic difference. Regarding measurements' acceptability and the type of interim restoration material utilized, 7 were acceptable, and 6 were unacceptable for ChemFil Superior, 12 were acceptable and 1 unacceptable for Ketac™ Molar Easymix, and 11 were acceptable and 2 were unacceptable for Filtek Z350 composite resin. The average difference between all electronic measurements was 0.29 (± 0.44). Chemfill Superior showed the most prominent variation between measurements 0.58 (± 0.45). When using an electronic apex locator, measurements showed statistically significant differences depending on the interim restoration material of choice (p<0.05). In conclusion, the measurement accordance using electronic apex locator to estimation the working length is higher, however the electronic estimation of working length can be significatively affected by the material chosen for interim temporary restoration.

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Section: Discussionmentioning

confidence: 99%

Effect of Materials For Interim Restoration on Estimation of Working Length Using Electronic Apex Locator: in vitro Study

Ortega¹,

Romero²,

Echeverri³

et al. 2021

Int. J. Odontostomat.

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“…Poppendiek et al 10 measured thermal conductivity in a large number of normal and frozen samples of biological fluids and tissues using a special unidirectional heat flow apparatus. Babu et al 11 studied a commercially accessible dental Glass Ionomer Cement by adjusting it at room temperature (300 K) for understanding its thermal properties, dielectric, and DC electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

Effect of Collagen Molecules and Hydroxyapatite Salt on Thermal Properties of Rib, Scapula, and Femur of Some Bovines under Normal and Decalcified Conditions

Rauf¹,

Ahmad²

2023

J. Pure Appl. Microbiol.

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The study of thermal properties such as conductivity and specific heat of biomaterials is very important as most biological processes, in which biological tissues, cells, and molecules are involved are dependent on body temperature. The main source of body heat is the chemical metabolism of food. Various mechanisms are being adopted by different types of animals to maintain body temperature, such as reducing blood flow through the capillaries nearest the skin surface, body hair can be fluffed up to increase insulation, heat production by shivering, etc. The hard and soft tissues, such as the flesh and bone of animals, play a very important role in keeping the required body temperature. The thermal conductivity and specific heat of the femur, rib, and scapula of two different environment animal ox, the wetland and camel desert dry land are investigated in normal and decalcified conditions. Modified Lee’s apparatus has been used to determine the thermal conductivity, while Renault’s apparatus which is based on the principle of the method of mixtures has been employed for determining the specific heat of samples that were pelletized. A difference in conductivities and specific heat of various bones in both animals was observed due to varied calcium phosphate. The decalcified bone samples of ox and camel show higher thermal conductivity compared to normal bones, while a decrease in specific heat was observed in decalcified bones. The specific heat is affected by the variations in the molecular structure due to changes in temperature. The paper suggests that these techniques are simple, elegant, and inexpensive besides being accurate.

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“…The first report on dielectric properties of glass ionomer cements was published by Tay and Braden . Later, Watts reported a systematic investigation of glass‐polyalkenoate/resin systems by dielectric spectroscopy, but up to now there have been only a few reports on the processes in glass ionomer cements and dental composites studied by this method. In particular, most of these studies are based on the measuring of the electrical conductivity or dielectric permittivity at fixed frequency during the setting process, attributing changes to the structural modifications.…”

Section: Introductionmentioning

confidence: 99%

New Insights into the Setting Processes of Glass Ionomer Cements from Analysis of Dielectric Properties

et al. 2015

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The setting processes in the commercial glass ionomer cement (Fuji IX Fast) and resin modified glass ionomer cement (Fuji II LC) were investigated by the dielectric spectroscopy. The changes in the real and imaginary parts of the dielectric permittivity [e*(x)] as well as dielectric loss (tan d) with time for Fuji IX Fast show several distinct regions which are related to the different stages of the acid-base reaction. Interestingly, the first stage that lasts for approximately 12 min terminates with a sharp decrease in dielectric parameters which is most probably related to the instantaneous (micro)fracturing of the sample due to a rapid build-up of the shrinkage stress. On the other hand, evolution of the dielectric properties during the setting of Fuji II LC indicates fast reaction in the initial stage (within few minutes) followed by the slow gradual change as a result of the competing nature of the acid-base reaction and lightactivated polymerization.

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Studies on electrical and thermal properties of dental glass ionomer cement

Cited by 7 publications

References 13 publications

Effect of Materials For Interim Restoration on Estimation of Working Length Using Electronic Apex Locator: in vitro Study

Effect of Materials For Interim Restoration on Estimation of Working Length Using Electronic Apex Locator: in vitro Study

Effect of Collagen Molecules and Hydroxyapatite Salt on Thermal Properties of Rib, Scapula, and Femur of Some Bovines under Normal and Decalcified Conditions

New Insights into the Setting Processes of Glass Ionomer Cements from Analysis of Dielectric Properties

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