EVALUATE THE VARIATION OF THE PH BETWEEN TWO MATERIALS FOR INTERNAL BLEACHING (IN VITRO) IN UNIRRADICULAR PIECES RELATED TO THE EXTERNAL CERVICAL REABSORTION.

Volume : VIII, Issue : IV, April - 2018

Od. Grace Soraya Ortiz Bohorquez, Dr. Ivan Ricardo Garcia Merino

SUMMARY: The objective of this research is evaluating the PH variation between two materials for internal bleaching,

in 60 uniradicular pieces and their relationship with external cervical resorption at the time of application.

Two types of internal materials were used, Whiteness HP "35%" (FGM) and Borosan (Lamosan). This research was complying with the

manufacturer‘s instructions in each of the procedures. Two groups were formed, to work with 30 pieces depulped with sodium perborate and

hydrogen peroxide, for the pH measurement was used a Digital Metro Ph which evaluated at the beginning, at that moment, 24 hours, 48 hours, 7

days, 14 days; the data obtained were analyzed statistically by Student‘s T and chi–square. It was observed that the acid value in hydrogen peroxide

and sodium perborate acquired an alkaline value taking into account that over time the values intensified. The increase in acidity had a greater

influence with an external cervical resorption.