Effect of CAD/CAM glass fiber post-core on cement micromorphology and fracture resistance of endodontically treated roots.

Purpose: To investigate the fracture resistance of weakened roots restored with prefabricated or CAD/CAM-customized posts and cores as well as the thickness of the cement film and the presence of voids in the cement.

Methods: The roots of 40 human premolars were weakened by removing internal dentin with a diamond bur (2.5 mm in the coronal third and 1.

Cuspal movement related to different polymerization protocols.

Objective: The aim of this study to investigate the effects of different polymerization protocols on the cuspal movement in class II composite restorations.

Materials And Methods: Human premolar teeth were prepared with class II cavities and then restored with composite and three-step and two-step etch-and-rinse adhesive systems under different curing techniques (n = 10). It was used a light- emitting-diode curing unit and the mode of polymerization were: standard (exposure for 40 seconds at 700 mW/cm(2)), pulse-delay (initial exposure for 6 seconds at 350 mW/cm(2) followed by a resting period of 3 minutes and a final exposure of 37 seconds at 700 mW/cm(2)) and soft-start curing (exposure 10 seconds at 350 mW/cm(2) and 35 seconds at 700 mW/cm(2)).

Customized fiber glass posts. Fatigue and fracture resistance.

Purpose: To evaluate the root fracture strength of human single-rooted premolars restored with customized fiberglass post-core systems after fatigue simulation.

Methods: 40 human premolars had their crowns cut and the root length was standardized to 13 mm. The teeth were endodontically treated and embedded in acrylic resin.

Three-year follow up of customized glass fiber esthetic posts.

Customized glass fiber posts that is well adjusted into the root canal and have mechanical properties similar to those of dentin may be a suitable treatment for severely compromised endodontically treated teeth. This article reports a 3-year follow up of severely damaged endodontically treated teeth restored with unidirectional fiber glass customized post and core system instead of a conventional fiber post. The fabrication of this glass fiber customized post is a simple technique, providing an increased volume of fibers into the root canal, and an adequate polymerization of the post-core system.

Multidisciplinary approach of a crown-root fracture using intentional replantation: a case report.

Crown-root fractures are complex traumatic injuries that require multidisciplinary management and afford uncertain prognosis. The purpose of this clinical article was to report the case of crown-root fracture where a multidisciplinary approach was successfully executed. A 10-year-old male patient who suffered a complicated crown-root fracture on a permanent maxillary central incisor was treated using an intentional 180°-rotation replantation technique, followed by endodontic therapy and restoration with resin composite.