Abstract
Objective: To compare the bond strength of three-step and self-etch adhesive systems with and without prior acid etching on bonding of fiberglass posts in root canals. Material and Methods: Experiments were conducted on roots of five upper molars without curvature and sectioned in a cervical-apical direction. With the aid of a high-speed turbine and diamond tips, cylindrical cavities 7 mm in depth and 1.4 mm in diameter were made in the dentine. The roots of the same tooth were used, where the retainers were cemented, thus generating three groups: Group A: Adper Scotchbond Multipurpose Plus (SBMP) + Rely X ARC; Group B: Single Bond Universal (SBU-1) + Rely X ARC, with acid etching prior to adhesive insertion; Group C: Single Bond Universal (SBU-2) + Rely X ARC. The samples were stored in a bacteriological incubator at 37oC with 100% humidity for 48h and were subsequently cross-sectioned to obtain 3 dentine discs 1mm in thickness. Forty-five specimens were subjected to the push-out test. Results: Through the analysis of variance and Tukey's test, it was found that SBMP showed, with statistical significance (p<0.05), highest bond strength when compared with the SBU-1 and SBU-2 systems. The observed difference in the discs was located in the cervical portion. Conclusion: The three-step adhesive system had higher bond strength with the substrate than the self-etching adhesive only in the disc in the cervical portion; further, statistically, the prior application of phosphoric acid in SBU-1 did not affect its bond strength significantly.
Highlights
The excessive loss of the coronal tooth structure caused by caries, previous restorations, and impact on crown fractures are the main reasons for the use of intrarradicular retainers, in order to reestablish the function of the tooth [1]
Objective: To compare the bond strength of three-step and self-etch adhesive systems with and without prior acid etching on bonding of fiberglass posts in root canals
Through the analysis of variance and Tukey's test, it was found that Scotchbond Multipurpose Plus (SBMP) showed, with statistical significance (p
Summary
The excessive loss of the coronal tooth structure caused by caries, previous restorations, and impact on crown fractures are the main reasons for the use of intrarradicular retainers, in order to reestablish the function of the tooth [1]. It is noticeable that when endodontic treatment is performed with excessive instrumentation, it can result in thinner dental walls, significantly reducing the ability of the teeth to withstand functional forces and resulting in the occurrence of fractures [2]. The use of intracanal retainers is required, for elements with reduced tooth remaining, metal and ceramic retainers can increase the occurrence of fractures. Fiberglass retainers, when associated with resin cements and adhesive systems distribute the functional forces most likely to resist fracture [2,3]. The present study was aimed at comparing (1) the bond strength of three-step adhesive systems and self-etch (2) the influence to promote or not acid etching prior to the application of selfetching adhesive, and (3) the bond strength at different depths in root canals using fiberglass retainers
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Pesquisa Brasileira em Odontopediatria e Clínica Integrada
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
