Bond strength analysis of intracanal posts used in anterior primary teeth: an in vitro study.

The purpose of this in vitro study is to assess the bond strength of three different posts used to restore primary anterior teeth. These posts were made by composite resin, 0.7 mm alpha-shaped orthodontic wire and dentin posts. Thirty roots of extracted primary anterior teeth, with initial physiological resorption, were mounted in a container filled with self cured resin and were endodontically treated Thirty posts were prepared using three different materials: 10 composite resin posts (Z100), 10 alpha-shaped orthodontic wire and 10 dentin posts. A bulk of composite resin (Z100) was made over the posts using a circular Teflon bisected strip. The specimens were stored in 37 degrees C water solution for 24 hours before tensile bond strength tests in 0.5 mm/min speed were performed (Instron model 4442 test machine--Instron Corporation). The results were submitted to the Kruskal-Wallis test and there were no significant statistical differences among the three types of posts assessed (p = 0.8666). The dentin posts technique might be considered an alternative for rehabilitation in pediatric dentistry, because of the possibility of natural resorption.