الفهرس 
Comparative evaluation of microshear bond strength of self adhering flowable composite and conventional flowable composite on dentine of primary teeth :in vitro study
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Abstract
Aim: To evaluate microshear bond strength and durability of self adhering flowable composite and conventional flowable composite to primary teeth dentine. Materials and methods: Sixty sound human deciduous canines were randomly divided into three main groups according to the restorative materials used, A: self adhering flowable composite (Fusio{u2122}Liquid Dentin), B: self adhering flowable composite (Fusio{u2122}Liquid Dentin) + self etch adhesive (Single Bond Universal), C: conventional flowable composite (Filtek{u2122} Z350 XT Flowable) + self etch adhesive (Single Bond Universal). Each group was subdivided into two subgroups according to storage period in isotonic saline solution; 24 hours or three months (n=10). Teeth were restored for microshear bond strength testing using universal testing machine; load was applied till specimen{u2019}s fail. Results: Fusio{u2122}Liquid Dentin and Single Bond Universal combination showed the highest bond strength values while Fusio{u2122}Liquid Dentin showed the lowest bond strength values at both periods (P{u2264}0.001). The only group that had a statistically non-significant decrease in bond strength after 3 months is Filtek{u2122} Z350 XT Flowable and Single Bond Universal combination (P=0.329). Conclusions: Self adhering composite applied according to manufacturers{u2019} instructions produced the least bond strength values to dentine of primary teeth. However, preceding it with self-etch adhesive improved its bonding performance significantly