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

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dc.contributor.author McKenna, Jill E.
dc.contributor.author Ray, Noel J.
dc.contributor.author McKenna, Gerald
dc.contributor.author Burke, Francis M.
dc.contributor.editor Abdalla, Ali I.
dc.date.accessioned 2012-03-20T17:29:18Z
dc.date.available 2012-03-20T17:29:18Z
dc.date.issued 2011-11
dc.identifier.citation Jill 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:10.1155/2011/679315 en
dc.identifier.volume 2011 en
dc.identifier.issued 679315 en
dc.identifier.startpage 1 en
dc.identifier.endpage 4 en
dc.identifier.uri http://hdl.handle.net/10468/551
dc.identifier.doi 10.1155/2011/679315
dc.description.abstract Aim: 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.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Hindawi Publishing Corporation en
dc.relation.uri http://www.hindawi.com/journals/ijd/2011/679315/
dc.rights Copyright © 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.uri http://creativecommons.org/licenses/by/3.0/ en
dc.subject Dentistry materials en
dc.subject Diametral tensile strength en
dc.subject Zinc phosphate cement en
dc.subject Set cement en
dc.subject Powder-liquid cements en
dc.subject.lcsh Dentistry, Operative en
dc.subject.lcsh Dentistry--Research en
dc.title The effect of variability in the powder/liquid ratio on the strength of zinc phosphate cement en
dc.type Article (peer-reviewed) en
dc.internal.authorurl http://research.ucc.ie/profiles/C502/nray en
dc.internal.authorurl http://research.ucc.ie/profiles/C502/gmckenna en
dc.internal.authorurl http://research.ucc.ie/profiles/C502/fburke en
dc.internal.authorcontactother Noel Ray, Restorative Dentistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: n.ray@ucc.ie en
dc.internal.authorcontactother Gerald Mckenna, Restorative Dentistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: g.mckenna@ucc.ie en
dc.internal.authorcontactother Francis Burke, Restorative Dentistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: f.burke@ucc.ie en
dc.internal.availability Full text available en
dc.date.updated 2012-03-17T11:42:49Z
dc.description.version Published Version en
dc.internal.rssid 110097449
dc.description.status Peer reviewed en
dc.identifier.journaltitle International Journal of Dentistry en
dc.internal.copyrightchecked Yes en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress n.ray@ucc.ie en


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Copyright © 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. Except where otherwise noted, this item's license is described as Copyright © 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.
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