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The effect of a preparation containing glycocholic acid and/or agitation on the tissue dissolution ability of sodium hypochlorite.

This study assessed the porcine palatal mucosa dissolution, from artificial grooves, by a final rinse of sodium hypochlorite (NaOCl) solely or mixed with Keratobacter ((KB); or agitation) passive ultrasonic irrigation (PUI) or sonic activation (SA). Soft-tissue samples (n = 123) were weighed and placed inside root canal grooves in central maxillary incisors. The specimens were randomly divided into six test groups (n = 20): NaOCl 3% with or without KB and the irrigation dynamics: positive pressure (PP), SA or PUI. An EDTA intermediate rinse was included. Soft-tissue weights were measured subsequently. The NaOCl + KB_PUI group showed the highest mean weight reduction, whilst the NaOCl_PP group recorded the lowest. NaOCl + KB subgroups were associated with hastened reduction compared with NaOCl subgroups. NaOCl_PP presented with significantly lower weight reduction when compared with the remaining experimental groups. The addition of KB to NaOCl or its agitation enhances tissue dissolution ex vivo. The agitation of KB-containing mixtures offers no further benefits.