The aim of this study was to evaluate the pH changes of five different calcium hydroxide (Ca(OH)2) and mineral trioxide aggregate (MTA) mixtures used for Intracanal medication and pulp capping. We prepared mixtures with distilled water, a local anaesthetic solution, physiological saline solution, chlorhexidine (CHX) and glycerine. The pH of each dressing material was determined using a digital pH meter. pH measurements were determined at 3 min, 10 min, 1 h, 3h, 24 h, 48 h and 7 days, respectively. All vehicles demonstrated similar pH changes, ranging within pH 11–12, when mixed with calcium hydroxide. In MTA groups, three different vehicles also showed similar pH changes values with calcium hydroxide, while the MTA+local anaesthetic solution and MTA +CHX mixtures demonstrated lower pH change values. Also, all MTA mixtures showed lower pH values against calcium hydroxide mixtures.
Keywords:- anaesthetic solution
- calcium hydroxide
- chlorhexidine
- glycerine
- intracanal dressing
- mineral trioxide aggregate
- pH value
- pulp capping