Assessment of pH increase in the external root surface after ultrasonic agitation of different calcium hydroxide pastes: Ex vivo study

Bernardo Almeida AGUIAR, Marcelo de Morais VITORIANO, Luiz Carlos Trévia Morais Correa VIANA, Eduardo Diogo GURGEL FILHO, Fábio de Almeida GOMES, Bruno Carvalho de VASCONCELOS, Claudio Maniglia FERREIRA

Objective: The aim of the present study was to evaluate, ex-vivo, the pH elevation capacity on the external root surface of different calcium hydroxide (HC) pastes, utilized as intracanal medication, it was also evaluated the influence of the ultrasonic activation at the application within the root canal. Methods: 100 human single root superior incisors were used, which had their root canals shaped and randomly divided into 6 experimental groups (n=15) according to the following HC pastes: Calen; HC + Chlorhex- idine 2% gel (CX2%); HC + distilled water, utilizing the medications and the ultrasonic activation of the paste at the time of the application as variables and 1 control group (n=10). The teeth were kept immersed in deionized water and the pH parameters were verified in 7, 14, 21 and 28 days with a pH measurement machine. Results: According to the data obtained, pH was elevated in the first week in all groups. Only the groups which the association of HC with CX2% was made, did show a significant increase in the pH level over the analyzed periods (p < 0,05). The activation of the pastes with US provided a significant increase in pH values (p < 0,05). Conclusion: According to the methodology used, we can conclude that all the HC pastes used, promote pH elevation in dentin tissue. And the acti- vation of the pastes with US significantly influences the pH increase in dentin tissue.

Keywords: Intracanal medication. Calcium hydroxide, pH. Ultrasound.

How to cite: Aguiar BA, Vitoriano MM, Viana LCTMC, Gurgel Filho ED, Gomes FA, Vasconcelos BC, Ferreira CM. Assessment of pH increase in the external root surface after ultrasonic agitation of different calcium hydroxide pastes: Ex vivo study. Dental Press Endod. 2021 May-Aug;11(2):38-43.

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