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Composites - Essay Example

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In dentistry, respective practitioners have used amalgam for many years as the restorative element (Noort & Barbour, 2013). Amalgam contains mercury, which has adverse dental-environment effects. Therefore, its use…
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Download file to see previous pages l made by combining two or more distinct materials in order to fabricate a new product bearing desirable combination of properties that a single materials cannot achieve (Noort & Barbour, 2013). These materials range from polymer, metallic to ceramic elements (Naseem, 2010). Dental composites are wear resistant including composite resins, glass monomer cement, compomers and giomers
For this case, I will design a composite that meant to replace amalgam as filler in dentistry. The composite must have a pH change as well as the ability to form a carboxylate salt. The material also has to contain fluoro-aluminosilicate glass, water as well as a polymeric acid (Brantley, & Eliades, 2011). In addition, the material ought to have improved physical conditions compared to conventional glass ionomoer. Such improvements aid reduction in water sensitivity, less fluoride release, rechargeable fluoride besides increase in thermal expansion (Naseem, 2010). Most importantly, the material has to be light cured to achieve good bonding to dentine, which depends on surface conditioning (Brantley & Eliades, 2011).
The composite used should be anisotropic since forces from different directions act on them.The forces acting on the other direction enhance materials properties in one direction (Brantley, & Eliades, 2011). Properties of strengths and stiffness depend on the direction of force applied. Transverse direction will be necessary for the composite because elastic constants are similar (Brantley, &Eliades, 2011).
Physical properties of the material needed for matrix include low solubility, high compressive strengths, as well as low flexural and sheer strengths. In addition, the material must have a thermal coefficient similar to dentin besides fluoride release and fluoride recharge. Glass monomer cement binds tooth and has diverse dimensions such as slight shrinking and expansion when setting (Naseem, 2010). It is also brittle and lacks translucency characterized by a rough ...Download file to see next pagesRead More
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