Comparison of Physical Properties of Tooth Colored Restorative Materials , Tooth colored Restorative Dental Materials are being used more profusely in Dentistry as the need for Aesthetics has increased and the tooth colored materials are having similar properties to materials like Amalgam. Here i am going to compare the various physical properties of Tooth colored Restorative Dental Materials: Strength Compressive Strength Modulus of Elasticity Shrinkage during Setting Co-efficient of Thermal Expansion Abrasive Resistance Solubility Syneresis Plasticity Microleakage Anticariogenecity Rate of Hardening Refractive Index of materials Strength Properties: Composite Resins: Highest Tensile and Compressive Strength (compared to all tooth colored Restorative materials) Filled Resins: Lowest Compressive Strength Silicate and alumino-silicate polyacrylate (ASPA): Lowest Tensile Strength Compressive Strength Comparison: Enamel: 40,000 to 56,000 psi Dentin: 30,000 to 50,000 psi Composite: 55,000 psi Silicate: 24,000 to 31,000 psi Alumino-silicate polyacrylate (ASPA): 23,000 to 28000 psi Modulus of Elasticity: Highest in Silicate Cements and Composite Cements Shrinkage during Setting: Unfilled Resin has maximum Shrinkage – 7 % Silicate Cements have Minimum Shrinkage – 0.2 to 0.5 % Co-efficient of Thermal Expansion: Silicate Cement: Closest to Natural Tooth Composite: Closest to Amalgam (25 to 35 ppm/degree centigrade) Abrasive Resistance: Hybrid Composite: Most Abrasive resistant Microfilled Composite: Least Abrasive resistant Solubility: Silicate Cements: Most Soluble in Water, Plaque, Acids like acetic Acid, citric Acid ASPA or GIC: Less soluble than Silicates Composite: Soluble in Organic Solvents which may be introduced Intra Orally Ex: Ethanol Syneresis: Silicate Cements: Maximum ASPA or GIC: Less than Silicate Cements Plasticity: Composites, Unfilled Resins Microleakage: Unfilled Resins and Second Generation Composites: Maximum Anticariogenicity: Silicate Cement: 700 ppm ASPA: 2200 ppm Refractive Index: Refractive Index of Enamel: 1.6 degrees Refractive Index of Dentin: 1.55 degrees Silicate Cements are Closest to Enamel and Dentin: 1.4 to 1.6 degrees Rate of Hardening: Resin Cements: 15 mins Silicate Cements: 48 mins , http://bit.ly/XetnAf

Comparison of Physical Properties of Tooth Colored Restorative Materials , Tooth colored Restorative Dental Materials are being used more profusely in Dentistry as the need for Aesthetics has increased and the tooth colored materials are having similar properties to materials like Amalgam. Here i am going to compare the various physical properties of Tooth colored Restorative Dental Materials: Strength Compressive Strength Modulus of Elasticity Shrinkage during Setting Co-efficient of Thermal Expansion Abrasive Resistance Solubility Syneresis Plasticity Microleakage Anticariogenecity Rate of Hardening Refractive Index of materials Strength Properties: Composite Resins: Highest Tensile and Compressive Strength (compared to all tooth colored Restorative materials) Filled Resins: Lowest Compressive Strength Silicate and alumino-silicate polyacrylate (ASPA): Lowest Tensile Strength Compressive Strength Comparison: Enamel: 40,000 to 56,000 psi Dentin: 30,000 to 50,000 psi Composite: 55,000 psi Silicate: 24,000 to 31,000 psi Alumino-silicate polyacrylate (ASPA): 23,000 to 28000 psi Modulus of Elasticity: Highest in Silicate Cements and Composite Cements Shrinkage during Setting: Unfilled Resin has maximum Shrinkage – 7 % Silicate Cements have Minimum Shrinkage – 0.2 to 0.5 % Co-efficient of Thermal Expansion: Silicate Cement: Closest to Natural Tooth Composite: Closest to Amalgam (25 to 35 ppm/degree centigrade) Abrasive Resistance: Hybrid Composite: Most Abrasive resistant Microfilled Composite: Least Abrasive resistant Solubility: Silicate Cements: Most Soluble in Water, Plaque, Acids like acetic Acid, citric Acid ASPA or GIC: Less soluble than Silicates Composite: Soluble in Organic Solvents which may be introduced Intra Orally Ex: Ethanol Syneresis: Silicate Cements: Maximum ASPA or GIC: Less than Silicate Cements Plasticity: Composites, Unfilled Resins Microleakage: Unfilled Resins and Second Generation Composites: Maximum Anticariogenicity: Silicate Cement: 700 ppm ASPA: 2200 ppm Refractive Index: Refractive Index of Enamel: 1.6 degrees Refractive Index of Dentin: 1.55 degrees Silicate Cements are Closest to Enamel and Dentin: 1.4 to 1.6 degrees Rate of Hardening: Resin Cements: 15 mins Silicate Cements: 48 mins , http://bit.ly/XetnAf , via كل يوم معلومة من طب الأسنان http://www.facebook.com/photo.php?fbid=444547625628177&set=a.439410116141928.1073741846.157162584366684&type=1