Analysis of the abutment-metal core interface, made of different pattern materials

Abstract

INTRODUCTION: The creation of metal cores for coronary restorations has usually been carried out following conventional technical protocols. (wax patterns) The fact that this has been considered a reliable way of proceeding has been tested with respect to the use of other materials. Typically, dentists carry out the “metal test” in the clinic on a reserve basis, with the aim of corroborating certain important clinical details. (adaptation, relationship with the prosthetic shoulder, antagonistic relationship, interproximal space, etc.)

OBJECTIVES: Compare the interface between the internal surface of the metal core, made using resin patterns (self-polymerizing) or wax (modeling) and the external surface of the abutment on dental models of refractory material. (Coating).

MATERIAL AND METHOD: For this study, veneer dental models (dies) were used with patterns made using self-polymerizing Acrylic Resin (group A1) and modeling wax (group A2). 10 resin patterns and 10 wax patterns were made. It is clarified that his work was always carried out on the same pillar (sample standardization). Subsequently, the patterns were cast and cemented on their respective pillars with a Vitreous Ionomer cement at controlled pressure, immediately afterwards they were sectioned longitudinally and the Pillar-core interface.

RESULTS: The results were compared using Student's T, obtaining the “P” value of 0.0486, that is, very close to 0.0500, which marks the statistically significant limit.

CONCLUSION: Based on the difference found in this study, it would seem that the comparison of the use of these materials would not be decisive, beyond the fact that the statistical values ​​found show us statistically significant differences.