Abstract
This study aims to determine whether the design of resin posts reinforced with glass fiber (FRC) and Reporfost (Angelus, Londrina, PR, Brazil) significantly improves the fracture resistance of endodontically treated teeth restored through this method.A batch of 30 maxillary monoradicular teeth (15 central incisors, 15 canines) were treated endodontically by step-back technique (apical enlargement 40-K file) sealed with Sealapex (Kerr Corporation, Orange, US) and gutta-percha by lateral condensation, cold. They were divided into two equal groups, prepared for cementing the FRC posts. The Exacto posts (Angelus, Londrina, PR, Brazil) in group 1 and the Reforpost posts (Angelus; Londrina; PR, Brazil) were cemented with dual cure resin cement Breeze Self-Adhesive Resin Cement (Pentron Clinical, Orange, US). Fracture resistance testing was performed on the crown-apical axial direction, using the Hounsfield / Tinius Olsen H1-KS, PA, USA mechanical testing apparatus. The behavior of each tooth-post assembly was recorded as a graph. The statistical analysis was done using one way ANOVA (α=0.05). The differences between the Exacto post group and the Reforpost post group are not statistically significant (p = 0.466). The maximum force recorded was 970 N and the minimum 186N. The mean force at which the fracture occurred was approximately 500N for both groups. The strain test showed that modifying the Reforpost post design did not improve the fracture resistance parameters of the tooth-post assembly through increasing the surface friction or maintaining adhesion to the walls of the root dentin.
Highlights
The amount of remaining hard structure determines the method of restoration after endodontic treatment decisively
The posts made of various materials: metal, zirconium, carbon, composite resins reinforced with glass fibers have been used for a long time
From the Exacto group, 4 teeth remained intact at a force of 880N, and from the Reforpost group, 1 tooth remained at the value of 970N
Summary
The amount of remaining hard structure determines the method of restoration after endodontic treatment decisively. The loss of dental tissue through extensive carious processes and following the endodontic treatment itself, especially by configuring the access cavity, substantially changes the biodynamics of the endodontically treated tooth. The consequence of these changes predisposes the tooth to fracture, and if the retention of future restoration is uncertain, it is recommended to use a device with intraradical aggregation, namely a post. Posts made of carbon fiber, despite the resistance and elastic behavior similar to dentin, were gradually abandoned due to the non-physiognomic appearance Practitioners turned their attention to more transparent posts reinforced with quartz, glass, or silicon-zirconium fibers [1]. The preparation of the canal in order to insert a pivot weakens the root, and its manufacture from rigid materials (metal) increases the risk of fracture
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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 callDisclaimer: 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.
