Background:In restorative dentistry we usually use Sandwich Technique for posterior restorations where GIC is placed below and a resin composite is placed over it. The bonding strength between these two materials are low. We are looking for the best adhesive system to put it in between. We think that the self-etching bond will give the best bonding strength between them whereas total etch will give lower bonding strength than self-etching system. Methods:ION-Z GIC was bonded to resin composite by using two different bonding agents. The thirty specimens used were prepared by using acrylic blocks with holes in each hole to retain the ION-Z GIC. The specimens were randomly divided into three groups:Group I: Control group.Group II: Total-etch adhesive was applied and cured over ION-Z GIC.Group III: Self-etch adhesive was applied and cured.The composite resin placed over the ION-Z GIC and cured. The shear bond strength was measured by shearing of the bonded specimens on Universal Testing Machine (Model 114) using speed of 0.1mm / minute. The reading was tabulated and subjected to statistical analysis using ANOVA and Tukey's test.Results:The test showed statistically significant difference between Group III and Group I and between Group III and Group II. Group III had the highest shear bonding strength.Conclusion:Self-etch adhesive agent produces have better shear bond strength to ION-Z than total-etch adhesive and to the group without any bonding agent.

In restorative dentistry, we usually use Sandwich Technique for posterior restorations where GIC is placed below and a resin composite is placed over it. The bonding strength between these two materials is low. We are looking for the best adhesive system to put in between. We think that the self-etching bond will give the best bonding strength between them whereas the total-etch will give lower bonding strength than the self-etching system.

Background:In restorative dentistry we usually use Sandwich Technique for posterior restorations where GIC is placed below and a resin composite is placed over it. The bonding strength between these two materials are low. We are looking for the best adhesive system to put it in between. We think that the self-etching bond will give the best bonding strength between them whereas total etch will give lower bonding strength than self-etching system. Methods:ION-Z GIC was bonded to resin composite by using two different bonding agents. The thirty specimens used were prepared by using acrylic blocks with holes in each hole to retain the ION-Z GIC. The specimens were randomly divided into three groups:Group I: Control group.Group II: Total-etch adhesive was applied and cured over ION-Z GIC.Group III: Self-etch adhesive was applied and cured.The composite resin placed over the ION-Z GIC and cured. The shear bond strength was measured by shearing of the bonded specimens on Universal Testing Machine (Model 114) using speed of 0.1mm / minute. The reading was tabulated and subjected to statistical analysis using ANOVA and Tukey's test.Results:The test showed statistically significant difference between Group III and Group I and between Group III and Group II. Group III had the highest shear bonding strength.Conclusion:Self-etch adhesive agent produces have better shear bond strength to ION-Z than total-etch adhesive and to the group without any bonding agent.

Abstract Background: Oral health hygiene and practices of pre-school children depends on the knowledge, awareness, and attitude of their parents. Parental education level, family background and family size play an important role in adapting oral hygiene practices. Also, oral health behaviors vary between boys and girls, and it is generally believed that girls are better at taking care of their oral hygiene than boys. This cross-sectional study aimed to assess oral health hygiene and practices of pre-school children (4-6 years old) and its correlation with their parent's education level, child gender and child order between his/her brothers in the family.Methods: A survey was conducted randomly among 270 parents of Damascus population. Access to the parents in the target age group was achieved through face-to-face interaction (14 parents), online (87 parents) and two different kindergartens in two different social areas (169 parents). A set of 17 questions were formulated, and the questionnaire was distributed. A comparison of the answers from the collected data was made on SPSS 24 using Chi-Square Tests.Results: Chi-Square Tests showed the important role of parental education level and its associated with regular dental visit (9.3%), temporary teeth treatment (48.1%), no early extracted teeth due to caries (48.5%) and no current caries (35.2%). On the other hand, there was no difference between child gender or order and daily oral hygiene practices.Conclusion: This study highlights the role of Parental education level in the quality of a child’s oral hygiene practices. Although some parents were aware of the importance of temporary teeth treatment and preventing caries through a regular dental visit, they weren’t aware of some deleterious oral habits.