Results 211 to 220 of about 24,428 (269)
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Solubility and disintegration of zinc phosphate cement
Biomaterials, 1992The 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.
V, Dupuis +4 more
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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.
Shinya, Horiuchi +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.
Shinya, Horiuchi +6 more
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Encapsulated verses hand-mixed zinc phosphate dental cement
Biomaterials, 1999Zinc phosphate cements are commonly supplied as two components, powder and liquid, and the proportions of the constituents are determined by operator experience. A capsulated system which is mechanically mixed has been marketed and this study investigated the performance of the encapsulated cement system.
G J, Fleming +3 more
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Influence of phytic acid on zinc phosphate cement
Acta Odontologica Scandinavica, 1994The 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.
J, Li, S, Forberg, R, Söremark
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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.
A, Abramovich, R L, Macchi, L M, Ribas
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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.
Z, Fakiha, A, Al-Aujan, S, Al-Shamrani
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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 ...
A, Piwowarczyk, P, Ottl, H C, Lauer
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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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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.
A D, Wilson, B E, Kent, B G, Lewis
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[Fatigue of dental zinc phosphate cement].
Shika zairyo, kikai = Journal of the Japanese Society for Dental Materials and Devices, 1992The 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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