Load-bearing capacity of XXXX incisor restored with various fiber-reinforced composite posts.

@entity702 @entity1 @entity505
OBJECTIVES: The aim of this study was to evaluate the load-bearing capacity and microstrain of incisors restored with posts of various kinds. Both prefabricated @entity702 posts and different fiber-reinforced composite posts were tested. METHODS: The crowns of @entity1 incisors were cut and post preparation was carried out. The roots were divided into groups: (1) prefabricated serrated @entity702 posts, (2) prefabricated @entity505 fiber-reinforced composite posts, (3) individually formed glass fiber-reinforced composite posts with the canal full of fibers, and (4) individually formed "split" glass fiber-reinforced composite posts. The posts were cemented and composite crowns were made. Intact @entity1 incisors were used as reference. All roots were embedded in acrylic resin cylinders and stored at room temperature in water. Static load was applied under a loading angle of 45   using a universal testing machine. On half of the specimens microstrain was measured with strain gages and an acoustic emission analysis was carried out. Failure mode assessment was also made. RESULTS: The group with @entity702 posts showed highest number of unfavorable failures compared to the groups with fiber-reinforced composite posts. SIGNIFICANCE: With fiber-reinforced composite posts the failures may more often be favorable compared to @entity702 posts, which clinically means repairable failures.
