IADR Abstract Archives
Chicken (Gallus domesticus) Eggshell as Composite Filler Material
Objectives: Dental composites, made up of polymeric/resin matrices where inorganic fillers are spread, have been a focus of innovations due to its contributions to aesthetics, strength, and flexibility. Chicken eggshell, comprised of 95% calcium carbonate, is a by-product that is widely used yet its disposal still contributes to environmental problems. Past studies have shown some properties of chicken eggshells similar to dental fillers. The effect of eggshell powder to the dental composite’s flexural strength is a focus of this study due to its relevance to filler content. Studies show that when more filler is added to the composite matrix, a decrease in flexural strength is observed.
Methods: Controlled and experimental blocks were made and tested following the International Standard ISO 9917-2 – Dental Water-Based Cements Part 2 Light Activated Cements. Kerr™ Dyad™ Flow composite was manipulated following the manufacturer’s instructions to form controlled blocks. Through manual grinding, a-25µ-powdered-chicken-eggshell was produced. It was subjected to high heat sterilization, coated with silane coupling agent and was combined to Dyad™ Flow composite to produce the experimental blocks. For comparison, 9 blocks were made for controlled and experimental blocks with 15%, 10% and 5% powder concentrations added. Normality test and Analysis of Variance were employed to analyze gathered data. The data showed high standard deviation implying variation on the flexural strength of the samples resulting to not normally distributed variables.
Results: Results showed the controlled variable and the experimental variables with 15%, 10% and 5% eggshell powder concentrations with mean values of 94.3067 mPa, 40.0211 mPa, 51.2856 mPa and 53.5789 mPa, respectively. With a p-value of <0.001 which is less than 0.01, there is great variation in values, making their difference very significant.
Conclusions: The comparative change in the flexural strength concludes that eggshell affected the mechanical property of the composite, hence, maybe a potential dental filler.
Methods: Controlled and experimental blocks were made and tested following the International Standard ISO 9917-2 – Dental Water-Based Cements Part 2 Light Activated Cements. Kerr™ Dyad™ Flow composite was manipulated following the manufacturer’s instructions to form controlled blocks. Through manual grinding, a-25µ-powdered-chicken-eggshell was produced. It was subjected to high heat sterilization, coated with silane coupling agent and was combined to Dyad™ Flow composite to produce the experimental blocks. For comparison, 9 blocks were made for controlled and experimental blocks with 15%, 10% and 5% powder concentrations added. Normality test and Analysis of Variance were employed to analyze gathered data. The data showed high standard deviation implying variation on the flexural strength of the samples resulting to not normally distributed variables.
Results: Results showed the controlled variable and the experimental variables with 15%, 10% and 5% eggshell powder concentrations with mean values of 94.3067 mPa, 40.0211 mPa, 51.2856 mPa and 53.5789 mPa, respectively. With a p-value of <0.001 which is less than 0.01, there is great variation in values, making their difference very significant.
Conclusions: The comparative change in the flexural strength concludes that eggshell affected the mechanical property of the composite, hence, maybe a potential dental filler.