Biocompatibilidade de um material a base de guta-percha autoadesiva (Bio-Gutta)

• Autor(a) principal: Belladonna, Felipe Gonçalves
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/14170
• topic: Materials testing; Dental materials; Bio-Gutta; Gutta-percha; Root canal obturation; Teste de materiais; Materiais dentários; Bio-Gutta; Guta-percha; Obturação do canal radicular; CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA

The purpose of this study was to evaluate the biocompatibility of a self-adhesive gutta-percha material (Bio-Gutta) in connective tissue of mice. Conventional gutta-percha was used as reference for comparison. Thirty mice were used in this study and they were randomly assigned into two groups (Bio-Gutta and conventional gutta-percha). The tested materials were implanted in the dorsal region of mice. After 7, 21 and 63 days, animals were sacrificed and 5 samples per group per time-point were obtained. Histologic samples were sectioned in 5 µm thickness and stained with conventional hematoxylin and eosin. A grade from I-IV was used to graduate the inflammatory reaction. Bonferroni-corrected Mann-Whitney U test was used for statistical analysis (p < 0,05). The results showed that after 7 days Bio-Gutta induced a slight to moderate tissue reaction (II) and conventional gutta-percha presented a moderate to intense inflammatory response (III). After 21 days, Bio-Gutta presented a slight tissue reaction (I), while conventional gutta-percha still showed a moderate inflammatory response (III). A slight to absent tissue reaction (I) was observed in Bio-Gutta after 63 days, whereas conventional gutta-percha showed a slight to moderate inflammatory response (II). There was a significant difference in the median degree of inflammation between the groups at each time-point (p = 0,005, at 7 days; p = 0,011, at 21 days; and p = 0,003, at 63 days). It was concluded that Bio-Gutta was more biocompatible than conventional gutta-percha in subcutaneous tissue of mice showing a good tissue response.