The effect of variability in the powder/liquid ratio on the strength of zinc phosphate cement

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dc.contributor.authorMcKenna, Jill E.
dc.contributor.authorRay, Noel J.
dc.contributor.authorMcKenna, Gerald
dc.contributor.authorBurke, Francis M.
dc.contributor.editorAbdalla, Ali I.
dc.date.accessioned2012-03-20T17:29:18Z
dc.date.available2012-03-20T17:29:18Z
dc.date.issued2011-11
dc.date.updated2012-03-17T11:42:49Z
dc.description.abstractAim: To investigate (a) variability in powder/liquid proportioning (b) effect of the extremes of any such variability on diametral tensile strength (DTS), in a commercial zinc phosphate cement. Statistical analyses (a = 0.05) were by Student's t-test in the case of powder/liquid ratio and one-way ANOVA and Tukey HSD for for pair-wise comparisons of mean DTS. The Null hypotheses were that (a) the powder-liquid mixing ratios observed would not differ from the manufacturer's recommended ratio (b) DTS of the set cement samples using the extreme powder/liquid ratios observed would not differ from those made using the manufacturer's recommended ratio. Methodology: Thirty-four undergraduate dental students dispensed the components according to the manufacturer's instructions. The maximum and minimum powder/liquid ratios (m/m), together with the manufacturer's recommended ratio (m/m), were used to prepare cylindrical samples (n = 3 x 34) for DTS testing. Results: Powder/liquid ratios ranged from 2.386 to 1.018.The mean ratio (1.644 (341) m/m) was not significantly different from the manufacturer's recommended value of 1.718 (p=0.189). DTS values for the maximum and minimum ratios (m/m), respectively, were both significantly different from each other (p<0.001) and from the mean value obtained from the manufacturer's recommended ratio (m/m) (p<0.001). Conclusions: Variability exists in powder/liquid ratio (m/m) for hand dispensed zinc phosphate cement. This variability can affect the DTS of the set material.en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationJill E. McKenna, Noel J. Ray, Gerald McKenna, and Francis M. Burke, “The Effect of Variability in the Powder/Liquid Ratio on the Strength of Zinc Phosphate Cement,” International Journal of Dentistry, vol. 2011, Article ID 679315, 4 pages, 2011. doi:10.1155/2011/679315en
dc.identifier.doi10.1155/2011/679315
dc.identifier.endpage4en
dc.identifier.issued679315en
dc.identifier.journaltitleInternational Journal of Dentistryen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/551
dc.identifier.volume2011en
dc.language.isoenen
dc.publisherHindawi Publishing Corporationen
dc.relation.urihttp://www.hindawi.com/journals/ijd/2011/679315/
dc.rightsCopyright © 2011 Jill E. McKenna et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.en
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en
dc.subjectDentistry materialsen
dc.subjectDiametral tensile strengthen
dc.subjectZinc phosphate cementen
dc.subjectSet cementen
dc.subjectPowder-liquid cementsen
dc.subject.lcshDentistry, Operativeen
dc.subject.lcshDentistry--Researchen
dc.titleThe effect of variability in the powder/liquid ratio on the strength of zinc phosphate cementen
dc.typeArticle (peer-reviewed)en
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