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

Abstract

Introdouction:Esthetic demands of patients have led to the introduction of tooth-colored restorations wherecomposite resins are bonded to the enamel using acid etch techniques. Total etch adhesion systems are still considered as the gold standard among bonding systems. However, clinicians have a tendency to use adhesive systems with simpler application procedures. The aim of the present study is to compare the shearbond strength of composite restorations to intact enamel of primary incisors when using different conditioners and adhesive systems. Materials and methods:This experimental study was conducted in Shiraz University of Medical Sciences. 53 teeth were collected and classified into five groups based on the bonding procedure. After composite buildup, specimens were placed in a universal testing machine with a cross-head speed of 1mm/ min. Inter-group comparison of the shearbond strength to enamel was analyzed employing one-way-ANOVA and Tukey's post-hoc test. Data were statistically analyzed using SPSS (Version 17, Chicago, IL, USA). Results:The highest shearbond strength was found in the second (37% phosphoric acid etching + Margin Bond adhesive system) and fifth groups (37% phosphoric acid etch + Tokuyama Bond Force adhesive system), and the lowest bond strength was found in the third group (Tokuyama Bond Force adhesive system alone) (p = 0.00). Conclusion:Based on the results of the present study, surface pre-treatment with 37% phosphoric acidalong with self-etching adhesive system resulted in increased shearbond strength in vitro. This method can be further studied in clinical settings.

Evaluation of Shear Bond Strength of Resin Composite to Enamel Surface of Permanent Teeth Eroded by Two Carbonated Beverages (In Vitro Study)

“…The cylindrical plastic tube was then removed leaving the composite resin. Shear bond strength test (30) Each specimen was mounted in a special attachment on a Universal Testing Machine (Instron Testing machine, Instron Corporation, Comten Industries, Inc. St. Petesburg, Florida, USA). Force was applied with a metallic loading blade placed as close as possible, parallel to the junction of the tested material and the enamel surface, with cross head speed 1mm/ min.…”

Assessment of Wettability and Contact Angle of Bonding Agent with Enamel Surface Etched by Five Commercially Available Etchants: An In Vitro Study

“…ere is also a lot of literature comparing the self-etching primers with the conventional two-step etching process involved in orthodontic bonding [6][7][8][9][10]. Various studies are also available comparing the shear bond strength of orthodontic composite using different etchants and adhesive systems [11]. Most of the studies primarily aimed at evaluating the influence of different etchants, varying etching times, and different orthodontic adhesives on the "strength of bonding" [12].…”