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Shynthesis and Characterizations of Calcium Hydroxyapatite Derived from Crabs Shells (Portunus pelagicus) and Its Potency in Safeguard against to Dental Demineralizations.

Raya I, Mayasari E, Yahya A, Syahrul M, Latunra AI - Int J Biomater (2015)

Bottom Line: Calcination was conducted to crab's shells of Portunus pelagicus at temperature of 1000°C for 5 hours.The results of calcination was reacted with (NH4)2HPO4, then dried at 110°C for 5 hours.The results showed that the rate of tooth demineralization in acetate buffer decreased significantly with the provision of hydroxyapatite into a solution where the addition of the magnitude of hydroxyapatite is greater decrease in the rate of tooth demineralization.

View Article: PubMed Central - PubMed

Affiliation: Chemistry Department, Faculty of Mathematics and Natural Sciences, Hasanuddin University, Makassar 90245, Indonesia.

ABSTRACT
Crab's shells of Portunus pelagicus species were used as raw materials for synthesis of hydroxyapatite were used for protection against demineralization of teeth. Calcination was conducted to crab's shells of Portunus pelagicus at temperature of 1000°C for 5 hours. The results of calcination was reacted with (NH4)2HPO4, then dried at 110°C for 5 hours. Sintering was conducted to results of precipitated dried with temperature variations 400-1000°C for a hour each variation of temperature then characterized by X-ray diffractometer and FTIR in order to obtain the optimum formation temperature of hydroxyapatite is 800°C. The hydroxyapatite is then tested its effectiveness in protection against tooth demineralization using acetate buffer pH 5.0 with 1 M acetic acid concentration with the addition of hydroxyapatite and time variation of immersion. The results showed that the rate of tooth demineralization in acetate buffer decreased significantly with the provision of hydroxyapatite into a solution where the addition of the magnitude of hydroxyapatite is greater decrease in the rate of tooth demineralization.

No MeSH data available.


Related in: MedlinePlus

FT-IR spectra of synthesis results in various temperatures (400–1000°C).
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fig7: FT-IR spectra of synthesis results in various temperatures (400–1000°C).

Mentions: FTIR results showed that the sintering temperature variation affects the absorption band shapes which generally all sintering results showed absorption band of -OH, absorption band υ1, υ2, υ3, and υ4 of PO43−, and CO32− groups. Infrared spectra in Figure 7 show the -OH groups at 633 cm−1 which are characteristic of hydroxyapatite [17] appearing on the sintering temperatures of 400–1000°C. Additionally spectrum also showed higher sintering temperature causing the sharper peaks phosphate group (PO43−) because the nature of the vibrating atoms moves faster at higher temperatures [19]. The presence of the phosphate group indicates the formation of hydroxyapatite in the precipitates.


Shynthesis and Characterizations of Calcium Hydroxyapatite Derived from Crabs Shells (Portunus pelagicus) and Its Potency in Safeguard against to Dental Demineralizations.

Raya I, Mayasari E, Yahya A, Syahrul M, Latunra AI - Int J Biomater (2015)

FT-IR spectra of synthesis results in various temperatures (400–1000°C).
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4508471&req=5

fig7: FT-IR spectra of synthesis results in various temperatures (400–1000°C).
Mentions: FTIR results showed that the sintering temperature variation affects the absorption band shapes which generally all sintering results showed absorption band of -OH, absorption band υ1, υ2, υ3, and υ4 of PO43−, and CO32− groups. Infrared spectra in Figure 7 show the -OH groups at 633 cm−1 which are characteristic of hydroxyapatite [17] appearing on the sintering temperatures of 400–1000°C. Additionally spectrum also showed higher sintering temperature causing the sharper peaks phosphate group (PO43−) because the nature of the vibrating atoms moves faster at higher temperatures [19]. The presence of the phosphate group indicates the formation of hydroxyapatite in the precipitates.

Bottom Line: Calcination was conducted to crab's shells of Portunus pelagicus at temperature of 1000°C for 5 hours.The results of calcination was reacted with (NH4)2HPO4, then dried at 110°C for 5 hours.The results showed that the rate of tooth demineralization in acetate buffer decreased significantly with the provision of hydroxyapatite into a solution where the addition of the magnitude of hydroxyapatite is greater decrease in the rate of tooth demineralization.

View Article: PubMed Central - PubMed

Affiliation: Chemistry Department, Faculty of Mathematics and Natural Sciences, Hasanuddin University, Makassar 90245, Indonesia.

ABSTRACT
Crab's shells of Portunus pelagicus species were used as raw materials for synthesis of hydroxyapatite were used for protection against demineralization of teeth. Calcination was conducted to crab's shells of Portunus pelagicus at temperature of 1000°C for 5 hours. The results of calcination was reacted with (NH4)2HPO4, then dried at 110°C for 5 hours. Sintering was conducted to results of precipitated dried with temperature variations 400-1000°C for a hour each variation of temperature then characterized by X-ray diffractometer and FTIR in order to obtain the optimum formation temperature of hydroxyapatite is 800°C. The hydroxyapatite is then tested its effectiveness in protection against tooth demineralization using acetate buffer pH 5.0 with 1 M acetic acid concentration with the addition of hydroxyapatite and time variation of immersion. The results showed that the rate of tooth demineralization in acetate buffer decreased significantly with the provision of hydroxyapatite into a solution where the addition of the magnitude of hydroxyapatite is greater decrease in the rate of tooth demineralization.

No MeSH data available.


Related in: MedlinePlus