Protaper--hybrid technique.

Unlabelled: Crown down preparation is the most known and described technique since the introduction of Nickel Titanium (NiTi) rotary instruments in endodontics. This technique gives good results but has limitations, such as not addressing the initial anatomy of oval or dumb-bell shaped canals. The specific design of the Protaper instruments allows use of them with a different technique and, specifically, with a brushing motion in the body of the canal.

Comparison of two implantation sites for testing intraosseous biocompatibility.

The purpose of this study was to compare two implantation sites--the mandible and the femur of the rabbit--for testing in vivo intraosseous biocompatility. Twenty-two new Zealand rabbits were anesthetized, and the mandibular and femur bones were exposed. A hybrid glass ionomer cement or zinc oxide eugenol cement was loaded into silicone carriers and inserted into the two bones after drilling the two cortical plates.

Canal configuration of the mesiobuccal root of the maxillary first molar: conventional and surgical approaches.

One of the primary causes of endodontic failure is the presence of untreated canals. Although the maxillary first molar has been described as the most endodontically treated tooth, the canal configuration has been the least understood. The purpose of this article is to present, with the aid of several clinical cases, a review of the literature regarding the frequency, the location, and the incidence of the second mesiobuccal canal in relation to the maxillary first molar, both for conventional and surgical approach.

Sealing ability of super EBA and Dyract as root-end fillings: a study in vitro.

The purpose of this study was to compare, in vitro, the sealing ability of Super EBA and a compomer, Dyract, as root-end filling materials. Forty-eight single-rooted human teeth were cleaned, shaped and obturated with gutta-percha. The root apices were resected and root-end cavities were prepared.

Comparison of the intraosseous biocompatibility of Dyract and Super EBA.

The purpose of this study was to compare the intraosseous biocompatibility of Dyract, a new hydrophilic glass-ionomer cement, to that of Super EBA. Twenty-four New Zealand rabbits were anesthetized, one leg was shaved, the femur exposed, and two holes were drilled through the cortical plate. The materials were loaded into silicone carriers and inserted into the femur.