Setting time and thermal expansion of two endodontic cements

Santos, Alailson Domingos dos; Araújo, E. B.; Yukimitu, K.; Barbosa, José Carlos; Moraes, João Carlos Silos

doi:10.1016/j.tripleo.2008.04.021

Cited by 30 publications

(32 citation statements)

References 19 publications

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“…MTA angelus (Aangelus, Londrina, PR, Brazil) is composed of 80% Portland cement and 20% bismuth oxide and has setting time of 14 minutes [21,22] .…”

Section: Calcium Enriched Mixture (Cem)mentioning

confidence: 99%

Biomimetic Materials in Dentistry

Ali¹,

Saraf²,

Patil³

et al. 2017

Res. Rev. J Mat. Sci

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“…MTA angelus (Aangelus, Londrina, PR, Brazil) is composed of 80% Portland cement and 20% bismuth oxide and has setting time of 14 minutes [21,22] .…”

Section: Calcium Enriched Mixture (Cem)mentioning

confidence: 99%

Biomimetic Materials in Dentistry

Ali¹,

Saraf²,

Patil³

et al. 2017

Res. Rev. J Mat. Sci

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“…Although the batches were managed at room temperature, the final system comprised of "mass tablet/stainless steel holder/glass top" was left to rest in an oven with temperature controlled at 37 C and humidity kept between 95% and 100%. 12,13 The samples were prepared in batches of sixteen disks using four sieves with 25, 38, 45, and 53 lm, varying for each particle size the relation powder/liquid, being one of each for PTR measurements. For example, an amount of 600 mg of clinker powder produces one set of four CER disks with grain size 25 lm that was mixed with emulsion volumes of 140, 150, 160, and 170 ll, respectively.…”

Section: A Sample Preparationmentioning

confidence: 99%

“…These results led to thermal expansion data and setting time of CER but will not be the subject of this work. 13,23 B. Thermal wave method: PTR experimental setup…”

Section: A Sample Preparationmentioning

confidence: 99%

“…To overcome such drawback, it has being pointed out the new possible application of MTA 4,11 as root filling material. Recently, it was proposed 12,13 a new endodontic a) cement (named CER hereafter) composition with PC basis, a gel composed of water, barium sulfate, and an emulsifier with the function of improving the handling properties. This material was developed as sealer and has to promote antimicrobial action and mineralized tissue barrier formation upon calcium ion releasing in adjacent tissue.…”

Section: Introductionmentioning

confidence: 99%

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Non-destructive thermal wave method applied to study thermal properties of fast setting time endodontic cement

Picolloto

Mariucci

Szpak

et al. 2013

Journal of Applied Physics

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The thermal wave method is applied for thermal properties measurement in fast endodontic cement (CER). This new formula is developed upon using Portland cement in gel and it was successfully tested in mice with good biocompatibility and stimulated mineralization. Recently, thermal expansion and setting time were measured, conferring to this material twice faster hardening than the well known Angelus Mineral trioxide aggregate (MTA) the feature of fast hardening (∼7 min) and with similar thermal expansion (∼12 μstrain/ °C). Therefore, it is important the knowledge of thermal properties like thermal diffusivity, conductivity, effusivity in order to match thermally the tissue environment upon its application in filling cavities of teeth. Photothermal radiometry technique based on Xe illumination was applied in CER disks 600 μm thick for heating, with prepared in four particle sizes (25, 38, 45, and 53) μm, which were added microemulsion gel with variation volumes (140, 150, 160, and 170) μl. The behavior of the thermal diffusivity CER disks shows linear decay for increase emulsion volume, and in contrast, thermal diffusivity increases with particles sizes. Aiming to compare to MTA, thermal properties of CER were averaged to get the figure of merit for thermal diffusivity as (44.2 ± 3.6) × 10−3 cm2/s, for thermal conductivity (228 ± 32) mW/cm K, the thermal effusivity (1.09 ± 0.06) W s0.5/cm2 K and volume heat capacity (5.2 ± 0.7) J/cm3 K, which are in excellent agreement with results of a disk prepared from commercial MTA-Angelus (grain size < 10 μm using 57 μl of distilled water).

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“…The contribution from the sample bending to the PA signal is calculated by solving the thermoelastic equations, whereas the thermal diffusion contribution is attained by solving the heat conduction differential equation, as described in details in Refs. 12, 18-20. Assuming that all light is absorbed at the sample surface and considering no axial heat flux, the pressure fluctuation in the air chamber of a photoacoustic cell due to thermal diffusion (TD) and thermoelastic (TE) bending of a thermally thick sample, i.e., l s a s ) 1, is expressed in one-dimension by 12,[18][19][20] …”

Section: Theorymentioning

confidence: 99%

Open photoacoustic cell for thermal diffusivity measurements of a fast hardening cement used in dental restoring

Astrath

Baesso

et al. 2012

Journal of Applied Physics

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Thermal diffusivity and conductivity of dental cements have been studied using open photoacoustic cell (OPC). The samples consisted of fast hardening cement named CER, developed to be a root-end filling material. Thermal characterization was performed in samples with different gel/powder ratio and particle sizes and the results were compared to the ones from commercial cements. Complementary measurements of specific heat and mass density were also performed. The results showed that the thermal diffusivity of CER tends to increase smoothly with gel volume and rapidly against particle size. This behavior was linked to the pores size and their distribution in the samples. The OPC method was shown to be a valuable way in deriving thermal properties of porous material.

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Setting time and thermal expansion of two endodontic cements

Cited by 30 publications

References 19 publications

Biomimetic Materials in Dentistry

Biomimetic Materials in Dentistry

Non-destructive thermal wave method applied to study thermal properties of fast setting time endodontic cement

Open photoacoustic cell for thermal diffusivity measurements of a fast hardening cement used in dental restoring

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