Abstract

BARROS, Pedro Paulo et al. Intraosseous implants of Resilon and gutta-percha in rats: a histopathological evaluation. RSBO (Online) [online]. 2010, vol.7, n.4, pp. 422-429. ISSN 1984-5685.

INTRODUCTION: Root canal system obturation uses filling materials and sealers that should present, among other proprieties, a biocompatibility to the periradicular tissues. OBJECTIVE: To compare, in vivo, bone tissue response to two types of biomaterials: Resilon points and gutta-percha points. MATERIAL AND METHODS: For this purpose, 40 male albino Wistar rats were used for implantation of the biomaterial points in their previously perforated left tibia. Twenty rats received gutta-percha point implants and the other 20 rats received Resilon point implants. All animals had their right tibia partially perforated, as a control group. At the end of the 2^nd, 4^th, 8^th and 16^th week post-implantation, bone tissue samples were taken for analysis. Histological sections were stained by HE, photographed, and morphologically analyzed using TPS Dig^â 1.38 software. Tissue response was analyzed, taking into consideration the periosteum thickness variation in the formed bone callus area. RESULTS: Data were statistically analyzed by ANOVA, followed by Tukey's test (p < 0.05). There was no statistical difference between the materials tested, when the periosteum thickness was analyzed. CONCLUSION: Both Gutta-percha and Resilon points were biocompatible and well tolerated when implanted in bone tissue of rats.

Keywords : rats; Endodontics; biocompatible materials.