Development of a Novel Dental Filling Material Using Hydroxyapatite Derived from Waste Oyster Shells

Show simple item record Uresha, M.T.S. Pitawala, H.M.J.C. 2021-02-25T06:11:36Z 2021-02-25T06:11:36Z 2020
dc.identifier.isbn 9789550481293
dc.description.abstract The present study aimed at developing a novel zinc phosphate based dental cement by adding Pentacalcium hydroxide triphosphate (hydroxyapatite) as a reinforcing filler to investigate the mechanical and elution properties of the prepared specimens. Here waste oyster shells of Crassostrea madrasensis were calcined to obtain Oxocalcium. The Calcium dihydroxide precursor for the synthesis of hydroxyapatite by wet precipitation method at room temperature was prepared by dissolving Oxocalcium in water. Synthesized hydroxyapatite was added into zinc phosphate powder in seven different ratios and specimens were fabricated. X-ray fluorescence spectroscopy results of oyster shells showed that Oxocalcium (88.5%) was the major oxide while Silicon dioxide and Iron (Ⅲ) oxide were present in trivial amounts. The stoichiometric calcium/phosphorus ratio of synthesized hydroxyapatite was close to 1.7. Both Fourier Transform Infrared spectroscopy and X-ray Diffraction results of unsintered and sintered hydroxyapatite were compatible with the results of the commercial compound. The particle size of the sintered hydroxyapatite was 1.518×10-6 m. Zinc phosphate cement with 10% hydroxyapatite was identified as the ideal percentage that showed the best mechanical and chemical properties with the highest compressive and diametral tensile strengths which were 66.85×106 Nm-2 are 18.88 Nm-2 respectively. Further, it showed the lowest elution percentage in pH 3 and 5 aqueous 2-Hydroxypropanoic acid and water. Hence hydroxyapatite synthesized from waste can be used as reinforcing filler in zinc phosphate dental cement. Keywords: Zinc phospate dental cement, Hydroxyapatite, Crassostrea madrasensis, oysters en_US
dc.language.iso en en_US
dc.publisher Uva Wellassa University of Sri Lanka en_US
dc.relation.ispartofseries ;International Research Conference
dc.subject Materials Sciences en_US
dc.subject Mineral Sciences en_US
dc.title Development of a Novel Dental Filling Material Using Hydroxyapatite Derived from Waste Oyster Shells en_US
dc.title.alternative International Research Conference 2020 en_US
dc.type Other en_US

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