Results 221 to 230 of about 23,824 (283)

Crystallization of zinc phosphate cement

The Journal of Prosthetic Dentistry, 1965
Abstract A microscopic study indicated that ZnHPO 4 ·3H 2 O was formed during the crystallization of zinc phosphate cement powder and liquid. Long crystals of ZnHPO 4 ·3H 2 O radiated from a nucleus of crystallization. Apparently, the surface tension force plays a role in partially inhibiting the growth of these crystals.
Paulo Amarante de Araújo   +1 more
openaire   +3 more sources

Solubility and disintegration of zinc phosphate cement

Biomaterials, 1992
The mechanism of erosion of a zinc phosphate cement was studied using two experimental procedures: discs of dental cement were immersed in distilled water under unrenewed conditions as defined by ISO standard; or discs were immersed under continuously running distilled water to simulate the oral environment.
M. Potin-Gautier   +4 more
openaire   +3 more sources

Structure of Zinc Phosphate Dental Cement

Journal of Dental Research, 1971
The zinc phosphate cement structure consists of excess zinc oxide particles in a non-crystalline, amorphous phosphate matrix. Crystals of hopeite (Zn3(PO4) 2·4H2O) can grow from the cement surface if excess water is present. Extensive pores and surface layers of crystals, which are dependent on moisture conditions, affect the strength and adhesive ...
G.E. Servais, L. Cartz
openaire   +3 more sources

Influence of phytic acid on zinc phosphate cement

Acta Odontologica Scandinavica, 1994
The influence of phytic acid on the properties of zinc phosphate cement was studied by adding 2-13 wt% phytic acid to the liquid. Improved mechanical strength and stability were found for some cements prepared from commercial powders when liquids with increased phytic acid content were used.
Sevald Forberg, Rune Söremark, J. Li
openaire   +3 more sources

Surface Structure of Zinc Phosphate Dental Cements

Journal of Dental Research, 1972
When zinc phosphate cement is formed enclosed between a glass plate and a tooth surface, it retains the excess moisture available at the time of setting. This causes the cement surfaces to become covered with weakly held crystals of hopeite (3 ZnO·P2 O5 · 4 H2O).
F. Rossi, G.E. Servais, L. Cartz
openaire   +3 more sources

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