| 000 | 03051cam a2200337 a 4500 | ||
|---|---|---|---|
| 003 | EG-GiCUC | ||
| 005 | 20250223032649.0 | ||
| 008 | 201228s2020 ua dh 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 | _aCai01.09.09.M.Sc.2020.Ay.F | ||
| 100 | 0 | _aAya Ibrahim Mohamed Yassin | |
| 245 | 1 | 0 |
_aFracture resistance of interim restoration constructed by 3D printing versus CAD/CAM technique / _cAya Ibrahim Mohamed Yassin ; Supervised Gihan Abdelhady Elnaggar , Dina Magdy Elshehawy |
| 246 | 1 | 5 |
_aمقاومة الكسر للأستعاضة المؤقتة باستخدام تقنية الطباعه ثلاثية الأبعاد مقابل تقنية الانطباع الرقمية : _bدراسة معملية |
| 260 |
_aCairo : _bAya Ibrahim Mohamed Yassin , _c2020 |
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| 300 |
_a112 P. : _bcharts , facimiles ; _c25cm |
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| 502 | _aThesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Prosthodontics | ||
| 520 | _aAim: to assess the fracture resistance of interim restorations fabricated by 3D printing technique compared to milling technique. Methodology: Typodont model of maxillary 1st molar was preprared for full coverage crowns.The prepared model was digitally scanned by extraoral scanner. Duplication of master die into sixteen epoxy resin dies. Sixteen interim crowns were constructed by two techniques include: CAD/CAM technology using TelioCAD PMMA disc and 3D printing technology using Nextdent C&B resin material.The specimens were divided into 2 equal groups (n=8). All interim crowns were cemented on their corresponding resin dies using cementation loading device. All samples were subjected to thermal cycles(1250cycles,5-55c) and mechanical cycles (37,000cycles,50N). Using SEM to assess the surface topography for samples in both groups and EDX microanalysis was used to evaluate the elemental compositions with relative values expressed in wt% and K ratio.The specimens were loaded to failure in Newton (N) using universal testing machine. Stereomicroscope was used to investigate the fracture pattern. Data was statistically analyzed used Kolmogorov-Smirnov and Shapiro-Wilk tests & Student{u2019}s t tests (Ü = 0.05) and failure mode (%) by the Fisher exact test & chi2 test (p{u2264}0.05). Results: The mean ± SD values of fracture resistance were recorded for milled group (933.46 ±104.49 N) meanwhile the mean ± SD value recorded with printed group were (1226.48±48.33 N). It was found that printed group recorded statistically significant higher fracture resistance mean value than milled group | ||
| 530 | _aIssued also as CD | ||
| 653 | 4 | _aFracture resistance | |
| 653 | 4 | _aInterim restoration constructed | |
| 653 | 4 | _aThree Dimensional (3D) | |
| 700 | 0 |
_aDina Magdy Elshehawy , _eSupervisor |
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| 700 | 0 |
_aGihan Abdelhady Elnaggar , _eSupervisor |
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| 856 | _uhttp://172.23.153.220/th.pdf | ||
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_aNazla _eRevisor |
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| 905 |
_aShimaa _eCataloger |
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| 942 |
_2ddc _cTH |
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| 999 |
_c79370 _d79370 |
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