Análise in vitro do comportamento de fios afastadores frente a diferentes consistências de dessensibilizantes usados no tratamento de hipersensibilidade dentinária

Abstract

The use of retraction cords in cervical dentin hypersensitivity treatment has an important role in keeping away the marginal gingival tissue that covers the dentinal root surface, which when exposed can cause pain. Thereat, the objective of the research is to evaluate the different patterns of absorption of retraction cords when in contact with two different consistencies of desensitizers by measuring the weight, length and width of the cord, and also by qualitative analysis of SEM images . Retractor samples (Roeko - Coltene, Retractor - Maquira, Ultrapack - Ultradent) were analyzed at two different times. Initially the cords were cut and measured dry and then immersed in desensitizers and measured again. The data were submitted to statistical analysis and it was observed that the retraction cords present different absorption patterns according to the consistency of the desensitizer. The roeko cord, because of the more consistent entanglement of its fibers absorbed less desensitizer compared to the retractor and ultrapack, and was inert to variations in length and width at different evaluated times.