Hands OnIntracanal composite anchorage versus posts
Section snippets
Background
Root canal posts are needed for severely decayed root canal−treated teeth and traditionally reach to the apical third of the root to provide sufficient retention and stabilization. Shorter posts have recently been shown to be acceptable when adhesive bonding to the root canal is provided. Luting shorter posts to the root canal dentin provides sufficient retention for coronal restorations and minimizes the risk of perforation. The fracture resistances of teeth that have been restored with a
Methods
The clinical crowns of 72 extracted mandibular premolars with similar dimensions at the cementoenamel junction (CEJ) were removed 1 mm below the buccal CEJ, leaving a root approximately 13 mm long. Nickel-titanium rotary instruments were used, then the root canals were filled with vertical condensed gutta-percha using an epoxy sealer. The roots were randomly assigned to three experimental groups of 24 teeth each and treated with post space preparation to a depth of 6 mm (groups 1 and 2) or a
Results
Median fracture load values were 290 for group 1 teeth, 408 for group 2 teeth, and 234 for group 3 teeth. There were significant differences between the three groups in terms of fracture resistance. Group 2 specimens had significantly higher fracture resistance than groups 1 and 3, which did not differ significantly from one another. The group 1 and 2 teeth, which were restored with posts, suffered unfavorable failure modes in most cases. For group 3 specimens, most fractures were believed to
Discussion
Compared to conventionally cemented titanium posts of the same length, adhesively cemented fiber posts performed more reliably with respect to fracture resistance. Adhesive intracanal anchorage 3 mm deep using just resin composite provided fracture resistance comparable to the use of titanium posts. When composite was used as a coronoradicular reinforcement, more teeth suffered reparable fractures than when fiber-reinforced composite posts or titanium posts were used. However, even teeth whose
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Krastl G, Izquierdo A, Büttel L, et al: Does an intracanal composite anchorage replace posts? Clin Oral Invest 18:147-153, 2014
Reprints available from G Krastl, Dept of Periodontology, Endodontology and Cariology, Univ of Basel, Switzerland, Hebelstrasse 3, CH-4056 Basel, Switzerland; e-mail: [email protected]