Study of the Intra-Coronal Pressure Generated by Internal Bleaching Agents and Its Influence on Temporary Restoration

Intra-coronal bleaching is a treatment that whitens non-vital teeth from within the pulp chamber, procedure by which oxygen and free radicals are released. This in vitro study analyzed compares expansion produced when different agents encounter dental tissues during this type of bleaching. Here, 120 lower incisors were included prepared to achieve conditions as close practicable internal with walking bleach technique. The access cavity lingual surface was seal glass tubes oil inside them adhesive restoration once placed chamber. following groups used: hydrogen peroxide (HP) 30% (n = 30), sodium Perborate (SP) distilled water mixture HP SP 30) control group 30). After 10 days, displacement took place through tube due release measured daily. Displacement observed all except group. final mean at days 335.24 ± 76.85 mm for group, 8.40 1.74 183.07 49.93 HP30% + mixture. Significant statistical differences between three using Games–Howell post hoc test, where caused greatest least expansion. These results suggest higher amount sample, more observed, so temporary must be performed carefully avoid displacement.