Push-Out Bond Strength of Prefabricated Fiberglass Posts in Endodontically Treated Teeth After Two Intracanal...

Introduction The different agents and intracanal irrigation systems used in endodontically treated teeth can affect the adhesion of prefabricated posts, which are frequently required to rehabilitate endodontically treated teeth. Objective To determine the adhesive resistance strength of fiberglass posts in endodontically treated teeth irrigated with NaOCl (sodium hypochlorite), activated both mechanically and ultrasonically. Methods Fourteen teeth that received endodontic treatment were defilled, leaving a 4 mm apical seal, and divided into two groups. Group one was irrigated with NaOCL and subjected to ultrasonic activation, and group two was irrigated with NaOCL and subjected to mechanical activation. DT Light-Post^® IllusionX-RO^® # 1 (RDT Dental, Saint-Égrève, France) fiberglass posts were cemented using TheraCem® (BISCO, Inc., Schaumburg, Illinois, USA) self-adhesive cement. The samples were aged by storing them at a constant temperature (36°C) for 30 days. Four cuts, each 2.5 mm in length, were then made and three root discs of the cervical, middle, and apical zones were obtained and subjected to a push-out test. Results For the 21 analyzed samples, group one presented a higher average adhesive strength (13.60 MPa) compared with group two (11.62 MPa). Conclusions The ultrasonic activation group reported the highest average strength at maximum load.