Clinical in-situ evaluation of the effect of rubber dam isolation on bond strength to enamel.

Rui I Falacho, Eliana Azevedo Melo, Joana A Marques, João Carlos Ramos, Fernando Guerra, Markus B Blatz

Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.] 2023 Jan

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To evaluate the effect of rubber dam isolation on shear bond strength of two different adhesive systems to enamel. The mesial, distal, lingual, and vestibular enamel surfaces of thirty human third molars were prepared (total n = 120). A custom splint was made to fit a volunteer's maxilla, holding the specimens in place in the oral cavity. Four composite resin cylinders were bonded to each tooth with one of two bonding agents (OptiBond FL and Prime&Bond active) with or without rubber dam isolation. Shear bond strength was tested in a universal testing machine and failure modes were assessed. Significance level for statistical analyses was set at 5%. All pairwise comparisons revealed statistical differences (p < 0.05). The highest mean shear bond strength values were obtained in rubber dam experimental groups, regardless of the adhesive system. Group OptiBond FL with rubber dam presented the highest mean bond strength values. Fracture modes for specimens bonded without rubber dam isolation were adhesive and cohesive within enamel, while rubber dam experimental groups revealed only cohesive fractures. Absolute isolation with rubber dam increases bond strength to enamel, independent of the adhesive system. The three-step total-etch system OptiBond FL provided significantly higher bond strength values than Prime&Bond active under both experimental conditions. Rubber dam isolation has a significant effect on bond strengths to enamel, independent of the adhesive system. Its application is, therefore, advised whenever adhesive procedures are performed. A filled three-step etch-and-rinse adhesive performed superiorly, with or without rubber dam isolation, when bonding to enamel compared to an isopropanol-based universal adhesive. © 2022 The Authors. Journal of Esthetic and Restorative Dentistry published by Wiley Periodicals LLC.

Citation

Rui I Falacho, Eliana Azevedo Melo, Joana A Marques, João Carlos Ramos, Fernando Guerra, Markus B Blatz. Clinical in-situ evaluation of the effect of rubber dam isolation on bond strength to enamel. Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.]. 2023 Jan;35(1):48-55