fa Effects of diphenyliodonium salt addition on the adhesive and mechanical properties of an experimental adhesive ترمیمی Cosmetic and Restorative Dentistry پژوهشي Research <p> <strong>Objectives </strong></p><p> The aim of this study was to assess the microtensile bond strength (μTBS), nanoleakage (NL), nano-hardness (NH) and Young's modulus (YM) of resin–dentine bonding components formed by an experimental adhesive system with or without inclusion of diphenyliodonium salt (DPIH) in the camphorquinone–amine (CQ) system. </p><p> <strong>Methods</strong></p><p>  On 12 human molars, a flat superficial dentine surface was exposed by wet abrasion. A model simplified adhesive system was formulated (40wt.% UDMA/MDP, 30wt.% HEMA and 30wt.% ethanol). Two initiator systems were investigated: 0.5mol% CQ+1.0mol% EDMAB and 0.5mol% CQ+1.0mol% EDMAB+0.2mol% DPIH. Each adhesive was applied and light-cured (10s 600mW/cm2). Composite build-ups were constructed incrementally and resin–dentine specimens (0.8mm2) were prepared. For NL, 3 bonded sticks from each tooth were coated with nail varnish, placed in the silver nitrate, polished down with SiC papers and analysed by EDX-SEM. NH and YM were performed on the hybrid layer in 2 bonded sticks from each teeth. The remaining bonded sticks were tested on μTBS (0.5mm/min). The data from each test were submitted to a Student t-test (α=0.05). </p><p> <strong>Results</strong></p><p>  No significant difference was found for μTBS between groups (p>0.05). Significant lower NL and higher NH and YM were found in the hybrid layer and adhesive layer produced with the iodinium salt-containing adhesive (p<0.05). </p><p> <strong>Conclusions</strong></p><p>  The inclusion of the DPIH to the traditional CQ is a good strategy to improve the adhesive and mechanical properties of a simplified etch-and-rinse adhesive system. </p><hr><p></p><p> <strong>Source: </strong>Journal of Dentistry</p><p> <a href="http://www.jodjournal.com/article/S0300-5712(13)00100-0/abstract" target="_blank"><font color="#0000ff">Full Text</font></a></p> Adhesive, Hybrid layer, Diphenyliodonium salt, Microtensile bond strength, Nanoleakage, Adhesive properties 0 0 http://idai.ir/browse.php?a_code=A-10-32-2175&slc_lang=fa&sid=1 Alessandro D. Loguercio 100319475328460010217 100319475328460010217 Yes Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil Rodrigo Stanislawczuk 100319475328460010218 100319475328460010218 No Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil Friedrich G. Mittelstadt 100319475328460010219 100319475328460010219 No Department of Research & Development, FGM Prod. Odont. Ltda, Joinville, Santa Catarina, Brazil Marcia M. Meier 100319475328460010220 100319475328460010220 No Department of Chemistry, State University of Santa Catarina, Joinville, Santa Catarina, Brazil Alessandra Reis 100319475328460010221 100319475328460010221 No Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil