5561
Mennat Allah Ali Khafagi
Strains Of Erwinia Carotovora The Causal Agent Of Soft Rot Of Some Vegetables And Its
Control In Egypt
shear band strength, optiband, all-in-one, nano leakage, vertise flaww
The aim of this study was to assess the Shear bond strength and Nanoleakage of three recent flowable composite: Vertise Flow, Fusio Liquid Dentin and OptiBond All-In-One when used in primary molars.  For Shear bond strength measurement • Shear bond strength of the investigated material to enamel of primary teeth was evaluated. A total of forty five freshly extracted, sounds and Free of cracks was collected. • Teeth were divided into three equal groups according to the material used (n=15 per group) Group A and Group 8were sub divided into two sub groups, sub Group 1received acid etchant while Group B didn’t receive any etchant. • Teeth were vertically embedded into acrylic mould. • The buccal surface of all teeth was grounded to obtain flat buccal surface. • After surface preparation specimens were ultrasonically washed to clean debris. • A cylindrical plastic tube with an internal diameter of approximately 1.5 mm was filled with each composite resin following the manufacture instruction. • The tubes were removed before testing and the specimens were placed in a shear bond fixture. • Shear bond strength was tested using a computerized universal texting machine. • Each specimen was vertically gripped with the two jaws of a holding device placed on the lower jig of the machine. • The specimens were loaded to failure using a cross head speed of 0.5 mm/min.
2019
M.Sc
Cairo
Dental Medicine