• Asian-Australasian Journal of Animal Sciences
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• v.2 no.2
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• pp.67-75
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• 1989

Studies were conducted to compare the utilization of dietary calcium between brown laying Tsaiya duck and Leghorn hen. Birds were fed corn-soybean diets containing 1.0, 2.0, 3.0, 4.0 and 5.0% calcium, respectively, with five birds per treatment. The metabolizability of calcium was determined by the indicator method. Experiments were conducted three times each at the age of 27, 31 and 36 weeks. Results appeared that duck eggs were heavier with better shell quality in comparison with hen eggs. Ducks fed 1% calcium diet resulted in severely depressed egg production (19%), but not for hens which still had 56% egg production. The metabolizability of calcium for hens was significantly higher than that for ducks (P<0.05) when both were fed diets containing 1 or 2% calcium. As the dietary calcium level was increased to 3 to 5%, there was no significant difference in calcium metabolizability between ducks and hens. When the dietary calcium was between 2 to 5%, the ducks retained more calcium than did the hens. Plasma calcium content for both hens and ducks fed 1% calcium diet was about the same. When the amount of the dietary calcium was increased to 2-5%, the plasma calcium level of ducks was approximately 7-10 mg/dl higher than that of hens. The calcium content in the egg shell of duck was significantly higher than that of hens, too. As the dietary calcium level was increased, there was a decreased magnesium content in the eggshell of hens, but not for ducks. The magnesium level in the eggshell was higher in hens than that in ducks. It is concluded that ducks could retain significantly more calcium and maintain higher plasma calcium level which might be the reason for larger eggs with better shell quality by ducks.

• Journal of Periodontal and Implant Science
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• v.34 no.3
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• pp.581-591
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• 2004

Calcium carbonate(CC) is biocompatible and gradually absorb to be replaced by bone when implanted into bone tissue. Fibrin-fibronectin sealant system (FFSS) is a product of human-derived plasma. The effect is hemostasis, tissue fixation and adhesion, We expect synergic effects of this two materials in periodontal regeneration. When FFSS was grafted with bone graft in intrabony defects, could be eliminated exofolication of bone graft materials. This study evaluated above materials for periodontal regeneration of 6mm intrabony defects in 36 patients. lap surgery was carried in 14 defects of control group. experimental group 1 was 11 defects grafted with calcium carbonate, experimental group 2 was 11 defects which were grafted with calcium carbonate with FFSS. The clinical parameters evaluated included changes in attachment level, probing depth, gingival recession at 6 months. Postsurgery probing depth reduction was 3.1 ${\pm}$ 0.9mm in control, 3.8 ${\pm}$ 1.6mm in experimental group 1, 4.1 ${\pm}$ 1.1mm in experimental group 2. The result clinically and statistically improved compared to baseline(P<0.01), but the difference found among the groups were not statistically significant. Postsurgery clinical attachment level was 1.6 ${\pm}$ 1.2mm in control, 3.5 ${\pm}$ 2.0mm in experimental group 1, 3.3 ${\pm}$ 1.2mm in experimental group 2. All of the control and experimental groups resulted in a statistically significant reduction from baseline(P<0.01). The reduction of the experimental groups were statistically significant from control(P<0.05). But the change between experimental group 1 and experimental group 2 was not statistically significant. We conclude that mixture of CC and FFSS is effective to periodontal regeneration in intrabony defect.