Results 231 to 240 of about 23,824 (283)
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Journal of the Mechanical Behavior of Biomedical Materials, 2014
Recently, zinc-releasing bioceramics have been the focus of much attention owing to their bone-forming ability. Thus, some types of zinc-containing calcium phosphate (e.g., zinc-doped tricalcium phosphate and zinc-substituted hydroxyapatite) are examined and their osteoblastic cell responses determined.
Kenichi Hamada +6 more
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Recently, zinc-releasing bioceramics have been the focus of much attention owing to their bone-forming ability. Thus, some types of zinc-containing calcium phosphate (e.g., zinc-doped tricalcium phosphate and zinc-substituted hydroxyapatite) are examined and their osteoblastic cell responses determined.
Kenichi Hamada +6 more
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Laboratory strength of glass ionomer and zinc phosphate cements
Journal of Prosthodontics, 2001Purpose 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 ...
Hans-Christoph Lauer +2 more
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Aspects of the chemistry of zinc phosphate cements
Australian Dental Journal, 1984Abstract— 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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Physical Properties of Some Zinc Phosphate and Polycarboxylate Cements
Acta Odontologica Scandinavica, 1983Several 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.
Trond Hegdahl, Rogério Branco
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Enamel Corrosion Produced by Zinc Phosphate Dental Cement
Journal of Dental Research, 1976The surface of tooth enamel that had been left in contact with a phosphoric acid solution or a zinc phosphate cement mix was studied by scanning electron microscopy. Both treatments modified enamel surface topography. The modifications were represented by cavities of varying extension and depth.
Lucía M. Ribas +2 more
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Zinc Phosphate Cements: Chemical Study of In Vitro Durability
Journal of Dental Research, 1970This 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.
Alan D. Wilson +2 more
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Addition of amalgam alloy to zinc phosphate cement
The Journal of Prosthetic Dentistry, 1962Abstract It was the purpose of this investigation to evaluate the procedure of adding amalgam alloy to zinc phosphate cement. Strength, solubility, disintegration, and adhesion to dentin were investigated.
George K. Armen, David B. Mahler
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Retention of cast posts cemented with zinc phosphate cement using different cementing techniques
Journal of Prosthodontics, 2001Purpose 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.
Arwa Al-Aujan +2 more
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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 ...
Just Broch +2 more
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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 ...
Just Broch +2 more
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In vitro toxicity tests of zinc phosphate cement
Journal of Oral Rehabilitation, 1978SummaryBHK‐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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