Resumo

GRECCA, Fabiana Soares et al. Resilon and Gutta-percha cones: an evaluation of biocompatibility in the connective tissue of rats. RGO, Rev. gaúch. odontol. (Online) [online]. 2012, vol.60, n.4, pp. 425-429. ISSN 1981-8637.

Objective This study tested tissue response to gutta-percha or Resilon cones at 7, 14, 30, 60 and 90 days Methods Thirty Wistar rats each received three subcutaneous implants of polyethylene tubes containing: GP (gutta-percha); R (Resilon); CG (control group - empty tube). After histological processing, sections were analyzed by a calibrated examiner, using a light microscope to identify the presence of neutrophils, lymphocytes and plasma cells, eosinophils, macrophages and giant cells, fibrous capsule and abscesses, by an examiner using a light microscope. Kruskal-Wallis and multiple comparison tests were used for the statistical analysis. Results There were no differences for the macrophages and giant cells, lymphocyte and plasma cell infiltrate, eosinophils, fibrosis or abscesses. Higher neutrophil infiltrate scores were observed at 7 days for groups R and CG (p≤ 0.05). In group R, the number of neutrophils decreased with time (p= 0.017). Conclusion The results of the present study demonstrate that Resilon cones are well tolerated by tissues and have acceptable biocompatibility, in the same way as gutta-percha cones.

Palavras-chave : Connective tissue.; Endodontics.; Root canal filling materials..