IRIS publication 110097449
The effect of variability in the powder/liquid ratio on the strength of zinc phosphate cement
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TY - JOUR - McKenna J, Ray N, McKenna G, Burke FM - 2011 - November - International Journal of Dentistry - The effect of variability in the powder/liquid ratio on the strength of zinc phosphate cement - Published - () - 2011 - 679315 - 1 - 4 - 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. DA - 2011/11 ER -
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@article{V110097449, = {McKenna J, Ray N and McKenna G, Burke FM }, = {2011}, = {November}, = {International Journal of Dentistry}, = {The effect of variability in the powder/liquid ratio on the strength of zinc phosphate cement}, = {Published}, = {()}, = {2011}, = {679315}, pages = {1--4}, = {{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.}}, source = {IRIS} }
Data as stored in IRIS
AUTHORS | McKenna J, Ray N, McKenna G, Burke FM | ||
YEAR | 2011 | ||
MONTH | November | ||
JOURNAL_CODE | International Journal of Dentistry | ||
TITLE | The effect of variability in the powder/liquid ratio on the strength of zinc phosphate cement | ||
STATUS | Published | ||
TIMES_CITED | () | ||
SEARCH_KEYWORD | |||
VOLUME | 2011 | ||
ISSUE | 679315 | ||
START_PAGE | 1 | ||
END_PAGE | 4 | ||
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. | ||
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