Abstract
The aim of this study was to evaluate different post lengths and adhesive strategies for restoring extensively damaged canines. Sixty human canines were randomly distributed into two groups (n=30), according to the resin cement used: self-adhesive or conventional. Each group was further distributed into 3 groups (n=10) based on the intracanal post lengths: 5, 7.5 and 10 mm. The radicular portion was endodontically filled, the cervical third was enlarged to simulate extensive damage and the coronal portion was reconstructed with composite resin. The samples were prepared with a simulated periodontal ligament and submitted to fatigue loading (160N – 1,200,000 cycles), followed by fracture resistance testing. The results were submitted to two-way ANOVA and Tukey tests (α=5%). The assessed glass fiber post lengths have not influenced on the fracture resistance (p>0.05). However, the performance of the conventional cements was better than the self-adhesive cements when the same post length was compared (p<0.05). Repairable fractures were prevalent (70-90%) in all groups tested. Conventional resin cement yielded higher fracture resistance than self-adhesive cement, regardless the post length adopted.
Highlights
Glass fiber posts (GFP) can be used to increase the retention of restorative materials to endodontically treated teeth with extensive damage
GFPs are a great alternative to metallic posts since they allow the use of adhesive strategies, using resin-based materials to adhere the GFPs to dentin.(Cagidiaco, et al, 2008, Hu, et al, 2003, Tay, et al, 2007) The use of adhesive approaches lead to a more conservative procedure and there is no need for laboratorial steps, leading to immediate sealing of the root canal.(Cagidiaco, et al, 2008, Schwartz, et al, 2004) Due to similar modulus of elasticity when compared to dentin, GFPs promote a better stress distribution through the tooth structure when compared to metallic post-and-core as well.(Schwartz, et al, 2004)
The adaptation of the fiber post to the canal is affected, leading to a thick cement line, increased polymerization shrinkage and, de-bonding of the GFP. (D'Arcangelo, et al, 2007) relining the fiber post with resin composite is a possible solution for this problem. (Dal Piva, et al, 2018, Faria-e-Silva, et al, 2009) This technique customizes the GFP to fit the root canal geometry and can reduce the thickness of the resin cement, decrease the formation of voids, and increase the retention of the GFP due to friction with the canal walls
Summary
Glass fiber posts (GFP) can be used to increase the retention of restorative materials to endodontically treated teeth with extensive damage. (Lazari, et al., 2018, Magne, et al, 2017) The indication of shorter posts is advantageous since it minimizes tooth preparation, reducing the risk of root perforation. It provides good visualization of the prepared post space and it may optimize lightcuring procedures of resin-based materials (such as resin cements and adhesive systems) inside the root canal. (Dal Piva, et al, 2018, Faria-e-Silva, et al, 2009) This technique customizes the GFP to fit the root canal geometry and can reduce the thickness of the resin cement, decrease the formation of voids, and increase the retention of the GFP due to friction with the canal walls.
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.
