Future University In Egypt (FUE)
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Altagamoa Al Khames, Main centre of town, end of 90th Street
New Cairo
Egypt

Essam Abdelhafez

Basic information

Name : Essam Abdelhafez
Title: Professor
Personal Info: Essam Eldin AbdelHafez works as a Professor at the Faculty of Dentistry at Future University in Egypt

Education

Certificate Major University Year
PhD 1985
Masters 1979
Bachelor 1973

Teaching Experience

Name of Organization Position From Date To Date
جامعة جامعة القاهرة 30/06/1995 31/08/2010

Researches /Publications

The Effect of Warm Air Solvent Evaporation on Microtensile Bond Strength of Two Different Self-Etch Adhesives to Dentin (In Vitro Study) - 01/0

Essam Eldin Abdelhafez Ahmed Nageib

Heba S.Hamza

01/05/2020

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Bonding of a Multi‐Mode Adhesive To Different Enamel Prism Orientations - 01/0

Essam Eldin Abdelhafez Ahmed Nageib

01/09/2018

Aim or purpose: This study was carried out to investigate the microshear bond strength (µSBS) of multi-mode adhesive (MMA) to different regions and prism orientations of enamel. Materials and Methods: Enamel substrates (n=80) were categorized into two main groups (n=40) according to the enamel regions tested; either cuspal or midcoronal enamel. Each region was then prepared either in axial or tangential sections (n=20). Then enamel specimens were bonded with MMA either in self-etch (SE) or etch-and-rinse (ER) adhesion protocol (n=10). Nano-filled flowable composite was used to prepare µSBS specimens. µSBS was assessed using universal testing machine. Resin-enamel interface was assessed under environmental scanning electron microscope. Statistical analysis was carried out using three way ANOVA test. Results: Results of the µSBS testing revealed no statistically significant difference between mean µSBS value of enamel regions tested, while bonding using MMA to tangentially sectioned enamel recorded a statistically significant (p≤0.001) higher mean µSBS value than bonding to axially sectioned enamel, also ER adhesion protocol recorded a statistically significant higher (p≤0.001) mean µSBS value compared to bonding using the SE adhesion protocol. In all specimens the hybrid layer was clearly detected with intimate adaptation between the adhesive resin and enamel, ER specimens showed clear resin microtags, while SE specimens did not show resin microtags except in the case of the axially sectioned cuspal enamel. Conclusions: The bond strengths of the MMA is influenced by the direction of enamel rods. Application of MMA in ER adhesion protocol improves the resin-enamel bond strength. Powered by TCPDF (www.tcpdf.org)

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