| 000 | 02820cam a2200337 a 4500 | ||
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| 003 | EG-GiCUC | ||
| 005 | 20250223032155.0 | ||
| 008 | 190128s2017 ua dho f m 000 0 eng d | ||
| 040 |
_aEG-GiCUC _beng _cEG-GiCUC |
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| 041 | 0 | _aeng | |
| 049 | _aDeposite | ||
| 097 | _aM.Sc | ||
| 099 | _aCai01.09.03.M.Sc.2017.Ra.E | ||
| 100 | 0 | _aRaneen Ahmed Abouelgheit Gohar | |
| 245 | 1 | 0 |
_aEffect of pH cycling on elemental and ultra-morphologic changes of enamel surface after using bleaching agents with and without fluoride versus sound enamel surface : _bIn vitro study / _cRaneen Ahmed Abou Elgheit Gohar ; Supervised Omaima Mohamed Safwat , Shereen Hafez Ibrahim |
| 246 | 1 | 5 | _aتأثير دورة الحامض على التحليل العنصرى والمورفولوجى لمينا الاسنان بعداستخدام مواد التبييض مع الفلورايد و دونه مقابل سطح المينا السليم: دراسة معملية |
| 260 |
_aCairo : _bRaneen Ahmed Abouelgheit Gohar , _c2017 |
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| 300 |
_a62 P. ; _bcharts , facsimiles , photographs ; _c25cm |
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| 502 | _aThesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Operative Dentistry | ||
| 520 | _aElemental and ultramorphological analysis were done for all specimens in all groups and subgroups for sound unbleached enamel, after bleaching procedure (under manufacturer instructions) and after pH cycle. Quantitative energy dispersive x-ray spectroscopy elemental analysis was performed on the enamel surface to determine the elemental levels (%) of calcium (Ca), phosphorus (P). The calcium (Ca) and phosphorus (P) contents were evaluated in weight percent (wt. %) and the mean Ca/P ratios were calculated. The ultra-morphological analysis was done using the Environmental Scanning Electron Microscope. One image was obtained from the center of each enamel surface specimen with magnification of 4000X. Data were collected, tabulated and statistically analyzed. Results: Quantitative energy dispersive x-ray spectroscopy elemental analysis showed a statistical significant difference among the three groups (control, bleaching without fluoride and bleaching with fluoride) in Ca wt % and P wt % while it showed no significant difference among three groups after performing pH cycle. However Ca/P ration showed no significant difference among the three groups but showed a significant difference after performing pH cycle | ||
| 530 | _aIssued also as CD | ||
| 653 | 4 | _aElemental and ultra-morphologic | |
| 653 | 4 | _aEnamel surface | |
| 653 | 4 | _aPH cycling | |
| 700 | 0 |
_aOmaima Mohamed Safwat , _eSupervisor |
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| 700 | 0 |
_aShereen Hafez Ibrahim , _eSupervisor |
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| 856 | _uhttp://172.23.153.220/th.pdf | ||
| 905 |
_aNazla _eRevisor |
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| 905 |
_aShimaa _eCataloger |
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| 942 |
_2ddc _cTH |
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| 999 |
_c69803 _d69803 |
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