Dental and Medical Problems

Dent Med Probl
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Dental and Medical Problems

2017, vol. 54, nr 2, April-June, p. 161–165

doi: 10.17219/dmp/70845

Publication type: original article

Language: English

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Creative Commons BY-NC-ND 3.0 Open Access

Evaluation of pH changes produced by dental pulp capping materials: An in vitro study

Ocena zmian pH wywoływanych przez materiały pokrywające miazgę zębową – badania in vitro

Elżbieta Łuczaj-Cepowicz1,A,B,C,D, Grażyna Marczuk-Kolada1,C,D,E,F, Małgorzata Pawińska2,E,F, Marta Obidzińska1,B,D

1 Department of Pedodontics, Medical University of Bialystok, Białystok, Poland

2 Department of Integrated Dentistry, Medical University of Bialystok, Białystok, Poland


Background. Ideal direct pulp capping materials should be biocompatible, have antibacterial and antiinflammatory properties, promote dental pulp regeneration, provide appropriate sealing, be insoluble in tissue fluids, and have sufficient mechanical properties.
Objectives. The purpose of this study was to observe time-related changes that occur in the pH values of different pulp capping materials.
Material and Methods. Nine materials were included in this study: Calcipulpe®, Calcipro®, Biopulp®, Life®, Dycal®, ProRoot MTA Grey®, ProRoot MTA White®, MTA Angelus Grey® and MTA Angelus White®. The pH values were recorded immediately after immersion (baseline) and after 1, 2, 3, 4, 24, 48, 72, 168, 336, and 504 h with a pH-meter, previously calibrated with solutions of known pH levels.
Results. All testing materials had an alkaline pH. Analysis of the pH changes as a function of time showed a gradual rise in the pH of all the materials. Differences in pH values between the first and last experimental period were statistically significant (p < 0.001). The highest pH increase was observed for setting and the lowest for non-setting calcium hydroxide preparations. Based on the obtained results, the preparations were divided into groups relating to their alkaline abilities. The highest pH increase was observed for setting and the lowest for non-setting calcium hydroxide preparations.
Conclusion. In conclusion, we can say that from the point of view of alkalizing properties, all the evaluated preparations can be used in vital dental pulp treatment.

Key words

pH, mineral trioxide aggregate (MTA), dental pulp capping materials, calcium hydroxide

Słowa kluczowe

pH, konglomerat trójtlenków metali (MTA), materiały do pokrycia miazgi zęba, wodorotlenek wapnia

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