| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Landini, Gabriel
University of Birmingham
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2023Multi-resolution Correlative Ultrastructural and Chemical Analysis of Carious Enamel by Scanning Microscopy and Tomographic Imagingcitations
- 2018Automated non-invasive cell counting in phase contrast microscopy with automated image analysis parameter selectioncitations
- 2018Structure-function correlative microscopy of peritubular and intertubular dentinecitations
- 2017Model-based Correction of Segmentation Errors in Digitised Histological Imagescitations
- 2016Understanding nature’s residual strain engineering at the human dentine-enamel junction interfacecitations
- 2015Automated optimisation of cell segmentation parameters in phase contrast using discrete mereotopology
- 2014Structure-mechanical function relations at nano-scale in heat-affected human dental tissuecitations
- 2014Hierarchical modelling of in situ elastic deformation of human enamel based on photoelastic and diffraction analysis of stresses and strainscitations
- 2014Semi-automated cell counting in phase contrast images of epithelial monolayers
- 2014Nano-scale thermo-mechanical structure-property relationships in human dental tissues studied by nanoindentation and synchrotron X-ray scatteringcitations
- 2013Hierarchical modelling of elastic behaviour of human enamel based on synchrotron diffraction characterisationcitations
- 2013Multiscale modelling and diffraction-based characterization of elastic behaviour of human dentinecitations
- 2009Ultrasonic Scaler Oscillations and Tooth-surface Defectscitations
- 2007Influence of compressive and deflective force on powered toothbrush filaments
- 2001The influence of mixing ratio on the toughening mechanisms of a hand-mixed zinc phosphate dental cementcitations
Places of action
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article
The influence of mixing ratio on the toughening mechanisms of a hand-mixed zinc phosphate dental cement
Abstract
OBJECTIVE: A range of mixing ratios occur for zinc phosphate cements in clinical usage and trials. The compressive strength of these cements is dependent on mixing ratio and at a critical ratio, a sudden rise in compressive strength is known to occur. This study investigated the mechanisms behind the cement curve behavior in an attempt to explain the strength increase with mixing ratio. METHODS: Crack propagation from indentations produced in cements were examined to identify if any variation in toughening mechanism existed over the range of mixing ratios investigated (1.7-3.2g/ml). Pore distribution within the cylindrical specimens was determined using an image analysis technique. RESULTS: Increasing the powder content from 2.3 to 2.4g/ml increased the number of powder agglomerates formed in the cement mix over individual particles. The likelihood of introducing pores in excess of 42 microm diameter was enhanced when the ratio exceeded 2.6g/ml. SIGNIFICANCE: It is proposed that crack deflection by agglomerates in the cement reduces the energy of the crack fronts emanating from indentations more than would occur with individual powder particles. This decreases the cracks ability to progress and is likely to result in the marked strength increase from 2.3 to 2.4g/ml identified previously. It is suggested that cement pores in excess of 42 microm diameter were probably generated on filling the sample molds with more viscous cements. These results emphasise that the properties of cements manipulated under optimum conditions provide little information on the cement characteristics present in clinical practice.