000			02845cam a2200337 a 4500
003			EG-GiCUC
005			20250223032517.0
008			200121s2019 ua dho f m 000 0 eng d
040			_aEG-GiCUC _beng _cEG-GiCUC
041	0		_aeng
049			_aDeposite
097			_aM.Sc
099			_aCai01.09.09.M.Sc.2019.Os.S
100	0		_aOsama Jaber Sabri Alshanti
245	1	0	_aShear bond strength of pressed and re- pressed lithium disilicate ceramics with two surface treatments : _bIn-vitro study / _cOsama Jaber Sabri Alshanti ; Supervised Gihan Elnaggar , Amr Saleh Eletreby
246	1	5	_aقوة الربط القصي لمادة الليثيوم ديسيليكات المضغوطة والمعاد ضغطها ومعالجة بنوعين من العلاج السطحى
260			_aCairo : _bOsama Jaber Sabri Alshanti , _c2019
300			_a103 P. : _bcharts , facsimiles , photographs ; _c25cm
502			_aThesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Prosthodontics
520			_aObjective: The aim of the present study is to evaluate the effect of two surface treatments (acid etching and sandblasting) on the shear bond strength of composite resin cement to pressed and repressed lithium di silicate ceramics. Patients and Methods: Fifty two lithium disilicate discs were constructed of 10mm diameter and 2mm thickness and were divided into 2 groups. Group (P) composed of 26 discs constructed from newly introduced lithium disilicate ingots while group (R) composed of 26 discs constructed from left over material that was shaped to resemble an ingot. Results: The discs were thermo-cycled in an attempt to simulate the intra-oral conditions and its detrimental effect on bond strength for 5,000 cycles which is equivalent to 6 months of intra-oral service and then the shear bond strength test was initiated. Then the mode of failure was examined and all data were collected, tabulated and statistically analyzed to detect any significant values among the tested groups. Conclusion: The re-use of e.max press left over buttons for construction of all ceramic restoration could be considered for socio-economic reasons. The type of surface treatment adopted greatly affects the shear bond strength of pressed and repressed ceramics and hence the durability of resin cement bonded to ceramics. Sandblasting cannot be considered as a reliable surface treatment when bonding to pressed and repressed glass ceramic
530			_aIssued also as CD
653		4	_aLithium
653		4	_aShear bond strength of pressed lithium
653		4	_aSurface treatments
700	0		_aAmr Saleh Eletreby , _eSupervisor
700	0		_aGihan Elnaggar , _eSupervisor
856			_uhttp://172.23.153.220/th.pdf
905			_aAsmaa _eCataloger
905			_aNazla _eRevisor
942			_2ddc _cTH
999			_c76433 _d76433