Avaliação in vitro da biocompatibilidade de resinas acrílicas para base de próteses e materiais reembasadores resilientes

• Main Author: Chaves, Carolina de Andrade Lima [UNESP]
• Publication Date: 2013
• Format: Doctoral thesis
• Language: por
• Source: Repositório Institucional da UNESP
• Download full: http://hdl.handle.net/11449/108408
• topic: Prótese dentária; Resinas acrilicas; Reembasadores de dentadura; Acrylic resins

The aim of this study was to evaluate the cytotoxicity of 3 denture base acrylic resins with different polymerization methods (Eclipse, Vipi Wave and Nature Cryl) and the biocompatibility of soft lining materials, 2 silicone-based (Ufi Gel P and Sofreliner S), 2 acrylic-based (Durabase Soft and Trusoft) and 2 tissue conditioners (Softone and Coe Comfort), by analysing cell metabolism, cell morphology, pattern of cell death, cell proliferation and expression of growth factor TGFß 1, integrin α5ß1 and cytokines. For the acrylic resins, analyses were made with L929 cells, while for the resilient lining materials, analyzes were performed using L929, and/or HaCaT and/or RAW 264.7 cells. Results were statistically analyzed, at a significance level of 5%. The 24 and 48-h eluates from all materials were not cytotoxic to the cells. For the direct contact tests (MTT and Alamar Blue), a significant effect on cell viability was found, with the lowest values observed for materials NC when compared with E and between the reliners Trusoft, Softone and Coe Comfort. For all materials, increased rate of necrosis and apoptosis were observed for the 24 hs eluates. It was also demonstrated that all materials tested can trigger the expression of TGFß 1, α5ß1 integrin and inflammatory proteins (tumor necrosis factor -TNF-α, cytokine IL-1ß and 5 chemokines- CCL2, CCL3, CCL5, CXCL2 and CXCL4). Thus, within the limitations of this study, it can be concluded that the denture base acrylic resin Nature Cryl resulted in lower cell viability compared to the Eclipse resin and that the materials Ufi Gel P and Sofreliner S showed better biocompatibility among the soft liner materials evaluated.