000			03299cam a2200337 a 4500
003			EG-GiCUC
005			20250223031516.0
008			160531s2015 ua o f m 000 0 eng d
040			_aEG-GiCUC _beng _cEG-GiCUC
041	0		_aeng
049			_aDeposite
097			_aM.Sc
099			_aCai01.09.13.M.Sc.2015.Ha.A
100	0		_aHaytham Mohamed Ayad
245	1	0	_aAnalysis of osteopromotive factors ininduced membrane formed around mandibular bone defects : _bAn experimental study / _cHaytham Mohamed Ayad ; Supervised Fahmy Abdelaal Hassanein , Mostafa Talaat Elgengehy
246	1	5	_aتحليل العوامل المحرضة لتكوين العظام فى الغشاء المكون حول العيوب العظمية بالفك السفلى : _bدراسة تجريبية
260			_aCairo : _bHaytham Mohamed Ayad , _c2015
300			_a113 P. : _bphotographs ; _c25cm
502			_aThesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Oral and Maxillofacial Surgery
520			_aThe aim of this study is to compare the effect of two resin infiltration systems on microhardness and surface roughness of demineralized enamel before and after an acidic challenge. A total of 40 caries free human maxillary molar teeth was used in this study. Four standardized 3 {u00D7} 3 mm2 windows were marked onto each tooth; two in the mesial surface and two in the distal surface, and the rest of tooth was covered with acid resistance nail varnish. Then, teeth were immersed in demineralizing solution at pH 4.5 for 72 hours at 35 {u00BA}C. Each tooth comprised 4 groups; Group 1- represents untreated sound enamel surface (positive control), Group 2- represents artificially demineralized enamel surface (negative control), Group 3- represents of Icon resin infiltrant (DMG America, Englewood) to demineralized enamel, while Group 4- represents of single bond universal adhesive (3M ESPE, USA) to demineralized enamel. For all groups, micro hardness was assessed using vicker`s micro hardness test and surface roughness was tested using optical profilometry. Group 3 and group 4 were further subjected to acidic challenge then further assessed using the same methods. The results for micro hardness revealed that Icon resin infiltrant and single bond universal adhesive showed significantly higher mean micro hardness than negative control, but significantly lower mean micro hardness than positive control. However, an insignificant difference was found between Icon and single bond universal adhesive. While, after the acidic challenge, Icon resin infiltrant showed significantly higher mean micro hardness than negative control. However, single bond universal adhesive showed insignificant difference than negative control. In addition, both treatments showed significantly lower micro-hardness than positive control with insignificant difference between both treatments
530			_aIssued also as CD
653		4	_aInduced membrane formed
653		4	_aMandibular bone
653		4	_aOsteopromotive factors
700	0		_aFahmy Abdelaal Hassanein , _eSupervisor
700	0		_aMostafa Talaat Elgengehy , _eSupervisor
856			_uhttp://172.23.153.220/th.pdf
905			_aNazla _eRevisor
905			_aSamia _eCataloger
942			_2ddc _cTH
999			_c56730 _d56730