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Intra oral view shows gutta percha in the root canal orifice after obturation; a: Flowable composite was placed to seal the root canal orifice; b: Hole was made using post drills supplied with the post kit; c: Trial fitting of fiber post; d: Acid etching of the pulp chamber; e: Placement of bonding agent f.
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Current literature suggests that tooth fracture post endodontic treatment is a more common complication than an endodontic reinfection. The best way to treat such complication is rehabilitation with complete coverage restoration with or without a foundation restoration. Critical analysis of several in vitro studies suggest that a posterior glass fi...
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... Thus, the use of anchorage had more repairable fractures and that fiber posts had a higher fracture load than titanium posts and composite anchorage [74]. Placing a fiber post in a horizontal position for reinforcement in teeth with remaining buccal and lingual walls is a fast, but not required, aesthetic restoration solution that requires a high skill set [75]. Broomberg et al. placed a single horizontal post in their study and found that the increase in fracture resistance was statistically significant by over 60% [76]. ...
This study aimed to evaluate the fracture strength of teeth restored using fiber-reinforced direct restorative materials after endodontic treatment with a conservative mesio-occlusal access cavity design.
A total of 100 extracted intact mandibular first molars were selected and distributed into a positive control group where teeth left intact and the following four test groups comprised of teeth with conservative mesio-occlusal access cavities that had undergone root canal treatment (n = 20/group): access cavity without restoration (negative control), bulk-fill resin composite with horizontal glass fiber post reinforcement, fiber-reinforced composite with bulk-fill resin and bulk-fill resin composite. Following thermocycling (10,000 cycles), fracture resistance was measured using a universal testing machine. Statistical analyses (one-way analysis of variance and the Tamhane test) were performed, and statistical significance was set at p < 0.05.
Groups with minimally invasive access cavities had lower fracture strength than intact teeth, regardless of the restoration material (p < 0.05). Fiber-reinforced composite groups demonstrated higher fracture strength than bulk-fill resin composite alone (p < 0.05). Fracture types varied among groups, with restorable fractures predominant in the fiber-reinforced composite groups.
This study suggests that using fiber-reinforced composite materials, especially in combination with bulk-fill resin composites, can effectively enhance the fracture strength of endodontically treated teeth with conservative access cavities. However, using only bulk-fill resin composite is not recommended based on the fracture strength results.
When teeth that undergo endodontic treatment are restored using a conservative access cavity design and fiber-reinforced composite materials, especially in combination with bulk-fill resin composites, the fracture strength of the teeth can be effectively increased.
