Analysis of filler particle levels and sizes in dental alginates

Carlo, Hugo Lemes; Fonseca, Rodrigo Borges; Gonçalves, Luciano de Souza; Correr-Sobrinho, Lourenço; Soares, Carlos José; Sinhoreti, Mário Alexandre Coelho

doi:10.1590/s1516-14392010000200022

Cited by 12 publications

(30 citation statements)

References 14 publications

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“…The members of this class, referred to as diatoms, are essentially unicellular, although chains of cells and colonial aggregations may occur [6]. There are records of these algae dating from the Cretaceous period.…”

Section: Discussionmentioning

confidence: 99%

“…To determine the wet mass (Mi), a recipient and a stainless steel mesh were placed over the balance plate and filled with distilled water, and the specimen was immersed. The volume of the specimen after the setting time was measured according to the following Equation (1) [6]:

\begin{matrix} Vs = Md - Mi . \end{matrix}

…”

Section: Methodsmentioning

confidence: 99%

“…To determine the wet mass of the particles (Mpi), the specimens were immersed in distilled water as described above, and at this time, the pill shape was disarranged because of its contact with the water. The volume of the inorganic particles was measured according to the following equation [6]:

\begin{matrix} Vp = Mp - Mpi . \end{matrix}

…”

Section: Methodsmentioning

confidence: 99%

“…The volume percentage of the inorganic phase was calculated using the following [6]:

\begin{matrix} Inorganic particle percentage = (\frac{Vp}{Vs}) \times 100 . \end{matrix}

…”

Section: Methodsmentioning

confidence: 99%

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Characterization of Morphology and Composition of Inorganic Fillers in Dental Alginates

Guiraldo

Berger

Consani

et al. 2014

BioMed Research International

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Energy dispersive X-ray spectroscopy microanalysis (EDX), scanning electron microscopy (SEM), and Archimedes' Principle were used to determine the characteristics of inorganic filler particles in five dental alginates, including Cavex ColorChange (C), Hydrogum 5 (H5), Hydrogum (H), Orthoprint (O), and Jeltrate Plus (JP). The different alginate powders (0.5 mg) were fixed on plastic stubs (n = 5) and sputter coated with carbon for EDX analysis, then coated with gold, and observed using SEM. Volume fractions were determined by weighing a sample of each material in water before and after calcining at 450°C for 3 h. The alginate materials were mainly composed of silicon (Si) by weight (C—81.59%, H—79.89%, O—78.87%, H5—77.95%, JP—66.88%, wt). The filler fractions in volume (vt) were as follows: H5—84.85%, JP—74.76%, H—70.03%, O—68.31%, and C—56.10%. The tested materials demonstrated important differences in the inorganic elemental composition, filler fraction, and particle morphology.

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Section: Discussionmentioning

confidence: 99%

\begin{matrix} Vs = Md - Mi . \end{matrix}

…”

Section: Methodsmentioning

confidence: 99%

\begin{matrix} Vp = Mp - Mpi . \end{matrix}

…”

Section: Methodsmentioning

confidence: 99%

“…The volume percentage of the inorganic phase was calculated using the following [6]:

\begin{matrix} Inorganic particle percentage = (\frac{Vp}{Vs}) \times 100 . \end{matrix}

…”

Section: Methodsmentioning

confidence: 99%

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Characterization of Morphology and Composition of Inorganic Fillers in Dental Alginates

Guiraldo

Berger

Consani

et al. 2014

BioMed Research International

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“…The powder contains sodium or potassium alginates (soluble alginates), diatomaceous earth acting as filler particles, calcium sulfate as reactor, a fluoride as accelerator and sodium phosphate as a retarder (11). The surface detail reproduction and dimensional accuracy properties are necessary for a true copy of the molded anatomical structures.…”

Section: Surface Detail Reproduction and Dimensional Accuracy Of Stonmentioning

confidence: 99%

Surface detail reproduction and dimensional accuracy of stone models: influence of disinfectant solutions and alginate impression materials

Guiraldo¹,

Borsato²,

Berger³

et al. 2012

Braz. Dent. J.

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This study compared the surface detail reproduction and dimensional accuracy of stone models obtained from molds disinfected with 2% sodium hypochlorite, 2% chlorhexidine digluconate or 0.2% peracetic acid to models produced using molds which were not disinfected, with 3 alginate materials (Cavex ColorChange, Hydrogum 5 and Jeltrate Plus). The molds were prepared over matrix containing 20-, 50-, and 75-µm lines, performed under pressure with perforated metal tray. The molds were removed following gelation and either disinfected (using one of the solutions by spraying followed by storage in closed jars for 15 min) or not disinfected. The samples were divided into 12 groups (n=5). Molds were filled with dental gypsum Durone IV and 1 h after the start of the stone mixing the models were separated from the tray. Surface detail reproduction and dimensional accuracy were evaluated using optical microscopy on the 50-µm line with 25 mm in length, in accordance with the ISO 1563 standard. The dimensional accuracy results (%) were subjected to ANOVA. The 50 µm-line was completely reproduced by all alginate impression materials regardless of the disinfection procedure. There was no statistically significant difference in the mean values of dimensional accuracy in combinations between disinfectant procedure and alginate impression material (p=0.2130) or for independent factors. The disinfectant solutions and alginate materials used in this study are no factors of choice regarding the surface detail reproduction and dimensional accuracy of stone models.

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Chemical analysis and microstructure examination of extended-pour alginate impression versus conventional one (characterization of dental extended-pour alginate)

Abdelraouf

2017

International Journal of Polymeric Materials and Polymeric Biom

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Analysis of filler particle levels and sizes in dental alginates

Cited by 12 publications

References 14 publications

Characterization of Morphology and Composition of Inorganic Fillers in Dental Alginates

Characterization of Morphology and Composition of Inorganic Fillers in Dental Alginates

Surface detail reproduction and dimensional accuracy of stone models: influence of disinfectant solutions and alginate impression materials

Chemical analysis and microstructure examination of extended-pour alginate impression versus conventional one (characterization of dental extended-pour alginate)

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