Reação tecidual e detecção de Interleucina-6 promovida por cimentos à base de silicato de cálcio no subcutâneo de ratos

• Autor(a) principal: Saraiva, Juliana Alcarás [UNESP]
• Data de Publicação: 2017
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/151511
• topic: Materiais biocompatíveis; Teste de materiais; Endodontia; Histologia; Interleucina-6; Colágeno; Biocompatible materials; Materials testing; Endodontics; Histology; Interleukin-6; Collagen

We evaluated the tissue reaction promoted by MTA Plus, MTA Fillapex, AH Plus and Endofill in the rat subcutaneous. Polyethylene tubes filled with MTA Plus, MTA Fillapex, AH Plus or Endofill were implanted in the rat subcutaneous. In the control group (CG), empty tubes were implanted. After 7, 15, 30 and 60 days, the tubes surrounded by connective tissue were paraffin-embedded. In HE-stained sections, the volume density of inflammatory cells (VvIC) and fibroblasts (VvFb) was estimated in the capsules. Immunohistochemistry (IH) for interleukin-6 (IL-6) was performed, and the number of IL-6-immunolabeled cells was obtained. The birefringent collagen content was quantified in picrosirius-red-stained sections under polarized light. Data were analyzed by ANOVA and Tukey tests (p≤0.05). At 7 days, capsules showed moderate inflammatory reaction, and VvIC and IL-6-immunolabeled cells were similar either in the capsules adjacent to the sealers or in CG. In all groups, VvIC and IL-6 IH reduced significantly from 7 to 60 days. At 60 days, IL-6 IH was reduced significantly in MTA Plus and MTA Fillapex in comparison to AH Plus; no difference was found in the VvIC among MTA Plus, MTA Fillapex, AH Plus and CG whereas Endofill exhibited the highest VvIC. The reduction in VvIC was parallel to an increase in the collagen content in the capsules of in all groups, except Endofill. MTA Plus, MTA Fillapex and AH Plus induce a response that culminates in the regression of inflammation and formation of a fibrous capsule over time. Considering that IL-6 immunoexpression significantly reduced in the MTA Plus and MTA Fillapex groups, it is possible to suggest that these endodontic sealers may favor the regression of the periapical lesion.