Results 171 to 180 of about 5,128 (218)

Aspects of the chemistry of zinc phosphate cements

Australian Dental Journal, 1984
Abstract— Consideration of the ZnO‐P2O5‐H2O constitutional diagram gives some insights into the setting reaction of dental zinc phosphate cements, and clarifies the requirements of acid concentrations and clinical mixing procedure.
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Comparison between a zinc phosphate cement and a glass ionomer cement for cementation of orthodontic bands

The European Journal of Orthodontics, 1983
The relative merits of zinc phosphate cement and glass ionomer cement for cementation of orthodontic bands are investigated in a controlled clinial trial. The good manipulative characteristics, relatively high compressive strength, convenient setting time and easy removal of excess cement, make zinc phosphate cement preferable for routine cementation ...
E, Kvam, J, Broch, I H, Nissen-Meyer
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Zinc Phosphate Cements: Chemical Study of In Vitro Durability

Journal of Dental Research, 1970
This study of the variation in chemical composition of material eroded from zinc phosphate cements in aqueous mediums establishes the effects of preparative variables and pH.
A D, Wilson, B E, Kent, B G, Lewis
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Laboratory strength of glass ionomer and zinc phosphate cements

Journal of Prosthodontics, 2001
Purpose The present in vitro study examined 3 mechanical properties, namely compressive, flexural, and diametral tensile strength, of various commercially available cements and core materials as a function of time after mixing.Materials and Methods The examined materials were 2 cermet cements (Ketac Silver [ESPE, Seefeld, Germany] and Chelon Silver ...
A, Piwowarczyk, P, Ottl, H C, Lauer
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Retention of cast posts cemented with zinc phosphate cement using different cementing techniques

Journal of Prosthodontics, 2001
Purpose This study compares the effect of different cementation techniques on the retention of cast posts and cores.Materials and Methods Twenty‐four extracted single rooted human teeth were used in this study. After routine preparation of the root canals, the canal space was enlarged with reamers.
Z, Fakiha, A, Al-Aujan, S, Al-Shamrani
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Physical Properties of Some Zinc Phosphate and Polycarboxylate Cements

Acta Odontologica Scandinavica, 1983
Several physical properties were measured for two zinc phosphate and three polycarboxylate cements. The specimens were tested in compression 24 h after they had been made. Two series of specimens were examined. In one series the cement powders were given a correct treatment, protected from atmospheric humidity.
R, Branco, T, Hegdahl
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Elements in minor or trace quantities in zinc phosphate cements

European Journal of Oral Sciences, 1979
Abstract – Eight powders and two liquids of zinc phosphate cements have been analyzed by optical emission spectrography for the purpose of characterizing elements in minor or trace quantities. The following elements were measured: bismuth, boron, cadmium, chromium, copper, iron, lead, silver and titanium.
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In vitro toxicity tests of zinc phosphate cement

Journal of Oral Rehabilitation, 1978
SummaryBHK‐21 (C‐13) cells were exposed to freshly mixed zinc phosphate cement for 0·5, 1 and 2 h in a simulated cavity apparatus. The effect on the cells was evaluated by quantitative measurement of acid phosphatase and succinic dehydrogenase reaction product in order to determine organelle membrane permeability. After 0·5 h cellmaterial contact there
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ZINC PHOSPHATE CEMENT AND RETENTION

Australian Dental Journal, 1988
R, Game, M, Darveniza
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[Fatigue of dental zinc phosphate cement].

Shika zairyo, kikai = Journal of the Japanese Society for Dental Materials and Devices, 1992
The fatigue characteristics of a zinc phosphate cement were examined. Using a split mould made of stainless steel, 12 mm x phi 6 mm column shape specimens were prepared. Fatigue tests were done by loading partially repeated pulsating diametrical tensile stress of 1-20 Hz, minimum stress was 0.2 MPa (2.0 kgf/cm2) and maximum stress was 3.5-5.4 MPa (36 ...
K, Okazaki, F, Nishimura
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