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The aim of this study is to determine strength of adhesive single-lap joints of Aluminum alloys which are widely used in geometric applications. It was investigated to define the influence of overlap length and surface roughness value on shear stre ngth of achieved adhesive joints. It was used Epoxy and Acrylic adhesives to prepare adhesive joints and all the specimens were subjected to axial tensile tests and the results are presented as a comparison. Results of those tests showed that shear strength increased with increasing each of overlap length and surface roughness of adherends and Acrelicadhesiveproduced4better results according to failure mode of tested samples.
The purpose of this study was to evaluate the effect of preetching with phosphoric acid on microleakage of self-etch adhesive material Adhes E in primary teeth. The study involve 50 primary teeth(molars ,canins )which extracted for orthodontic re asons had no caries ,fractures ,crack. The teeth were gathered in Hama university-pediatric dentistry department. Class v cavity prepared in all samples.
The purpose of this study was to evaluate the shear and tensile bond strengths of orthodontic brackets bonded with self etching primer and resin-reinforced glass ionomer cement in comparison with light cured resin adhesive. The tested self-etching primer and adhesive systems produced bond strength values higher than that of the light cured resin adhesive whereas the resin-reinforced glass ionomer cement showed a significantly reduced bond strength . Clinically, the use of self-etching primer and adhesive systems is suitable for orthodontic bracket bonding.
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