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Background: Esthetic demands among patients have led to the introduction of tooth-colored restorations. Composite resins bond to enamel applying acid etch technique. Total etch adhesion systems are still considered as golden standard among bonding systems. However, clinicians have tendency towards using adhesive systems with a simplified application procedure. The aim of the present study is to compare the shear-bond strength of composite restoration to intact enamel of primary incisors using different conditioners, and adhesive systems. Materials and Methods: This experimental study was conducted in Shiraz University of Medical Sciences. 53 teeth were classified into 5 groups based on the bonding procedure. After composite build-up, specimens were placed in a universal testing machine at a cross-head speed of 1mm/min. Inter-group comparison of the shear-bond strength to enamel was analyzed employing One-way-ANOVA and Tukey post-hoc test. Data were statistically analyzed using SPSS (Version 17, Chicago, IL, USA). Results: The highest shear-bond strength was related to the second (37% phosphoric acid etching + Margin Bond adhesive system), and the fifth group (37% phosphoric acid etch + Tokuyama Bond Force adhesive system), and the lowest bond strength was related to the third group (Tokuyama Bond Force adhesive system alone) (p value = 0.00). Conclusion: Based on the results of the present study, surface pre-treatment with 37% PA accompanied with self-etching adhesive system, increased the shear-bond strength in vitro. This method can be further studied in clinical settings.

dentomaxillofacial radiology, pathology and surgery

Comparison of Shear Bond Strength of Composite Restorations to Intact Enamel of Primary Incisors When Using Different Conditioners and Adhesive Systems