Resistência adesiva na cimentação de pinos de fibras de vidro utilizando diferentes sistemas adesivos e agentes cimentantes

Abstract

The idea of using root canals for the retention of restorations of endodontically treated teeth is not new. The post function is to provide retention and support for the restoration material. The present work assessed the adhesive resistance of one dual adhesive system (Excite DSC), one chemical adhesive system (Alloybond), one dual resin cement (Variolink II) and one chemical resin cement (C&B Cement) in fiberglass post cementation (Reforpost). Forty sound human canines, extracted due to periodontal problems, were used. The anatomic crowns of the teeth were cut at the cementoenamel junction. Fiberglass postsReforpost (Angelus) were cemented, and 4 groups were formed with 10samples each. The samples were stored in distilled water at 37ºC for 24 hours. After this period, the teeth were fixed in stainless steel tubes with self-curing acrylic resin using a parallelometer. Subsequently, a same size new tube was positioned upside down on the first one in order to hold the fiberglass post up after its setting. A guide tube with positioning posts at both ends was used to standardize all the samples. The samples were positioned in an universal testing machine (Instron) for the traction tests. The comparison of the adhesive systems showed that Alloybond presented higher adhesive resistances, regardless of the resin cement used. There was no statistically significant difference between the resin cements Variolink II and C&B Cement.