الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
This study evaluated the influence of a deproteinizing solution (NaOCl) and pH cycling on microtensile bond strength of both HEMA-containing and HEMA-free self-etch adhesive resins. Also examines the ultramorphology of hybrid layer of each case. Methods: Thirty sound human premolar teeth were collected. The teeth were prepared for microtensile bond strength using five different adhesives; an etch-and- rinse adhesive (ExciTE), two self-etch HEMA-containing adhesives (Easy bond & Clearfi Tri-S) and two self-etch HEMA-free adhesives (G-bond & AdheSE-One). Each adhesive was subjected to storage in distilled water, NaOCl and pH-cycle, separately before microtensile bond strength testing. The data was statistically analyzed with two-way ANOVA and Duncan tests. Another five premolars were prepared for SEM evaluation after specimens subjection to the same storage media as microtensile test. Results: HEMA- free adhesives has better microtensile bond strength than HEMA- containing ones. Both NaOCl and pH cycling deteriorate bond strength.