Browsing by Author "Hamza, Nermeen Kamal"

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    EVALUATION OF RE-MINERALIZATION OF INITIAL ENAMEL LESIONS USING NANOHYDROXYAPATITE AND CORAL CALCIUM WITH DIFFERENT CONCENTRATIONS
    (EDJ, 2019-10) Abdelnabi, Ali; Hamza, Nermeen Kamal; Othman, Maha S.
    Coral calcium is a boasting natural product and dietary supplement which is considered a source of alkaline calcium carbonate, this study is a comparative study, comparing the remineraliztion effect of the new product of coral calcium with that of nano hydroxyapatite. Methodology: a total of 35 extracted molars were collected, examined and sectioned to obtain 70 sound enamel discs, all discs were numbered and examined by scanning electron microscope coupled with Energy Dispersive Analysis of X-rays(EDAX) for mineral content, subjected to artificial caries and mineral content was re measured, discs were divided into 7 groups according to the remineralizing agent used, where groups 1 to 3 used 10, 20, 30 % nanohydroxyapatite gel respectively, groups 4 to 6 used 10, 20, 30 % coral calcium gel and group 7 with no reminieralizing agent (control group). All groups were re-examined by EDAX after remineralization, data were calculated and tabulated. Results: all groups showed statistically significant drop in calcium level after artificial caries, all groups showed statistically significant rise in calcium content after re mineralization except for the control group, groups 1 and 5 showed the highest increase in calcium level after re mineralization. Conclusion: coral calcium can be considered a comparative product to nano hydroxyapatite regarding re mineralization of enamel initial carious lesions.
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    Remineralization Potential Of Pearl Powder Compared To Casein Phosphopeptide Amorphous Calcium Phosphate On Enamel White Spot Lesions (Randomized Clinical Trial)
    (Wolters Kluwer Medknow Publications, 2022-12) El Baz, Maha Abdelsalam; Hamza, Nermeen Kamal; Shaalan, Omar Osama; El-Sherif, Shereen Assem
    Aim: The aim of this study was to evaluate the remineralization potential of pearl powder on early (‘white spot’) lesions in enamel compared to casein phosphopeptide-amorphous calcium phosphate . Methodology: Twenty Patients who had post orthodontic white spot lesions (57 subjects) were included and were randomly allocated in two groups receiving either CPP-ACP as a control (29 subjects) or pearl powder gel (28 subjects), they used it twice daily for three months. The white spot lesions were assessed clinically at baseline, 3,6,9 and 12 months using the Clinical index used for visual evaluation of white spot lesions and photographic image analysis to detect the change in color and area of the white spot lesions. Parametric data were analyzed for intergroup comparisons using independent t-test and for intragroup comparisons using repeated measures ANOVA followed by Bonferroni post hoc test. Non-parametric data were analyzed using Mann-Whitney U test for intergroup comparisons and Friedman’s test followed by Nemenyi post hoc test for intragroup comparisons. The significance level was set at p≤0.05 within all tests. Results: A significant improvement of the clinical WSL-scores was found over time in both groups, with no statistically significant difference (p<0.01). As for the photographic image analysis, the color change and area of WSLs significantly improved after12 months with no statistical difference observed between both groups. Conclusions: The Pearl powder had a similar remineralization potential when compared to CPP-ACP on the early enamel white spot lesions after 12 .months