title: Evaluation of calcium ion, hydroxyl ion release and pH levels in various calcium hydroxide based intracanal medicaments: An in vitro study.
abstract: OBJECTIVE
  Evaluation of calcium ion and hydroxyl ion release and pH levels in various calcium hydroxide based intracanal medicaments.
  
  
  OBJECTIVE
  The purpose of this study was to evaluate calcium and hydroxyl ion release and pH levels of calcium hydroxide based products, namely, RC Cal, Metapex, calcium hydroxide with distilled water, along with the new gutta-percha points with calcium hydroxide.
  
  
  METHODS
  The materials were inserted in polyethylene tubes and immersed in deionized water. The pH variation, Ca(++) and OH(-) release were monitored periodically for 1 week.
  
  
  METHODS
  Statistical analysis was carried out using one-way analysis of variance and Tukey's post hoc tests with PASW Statistics version 18 software to compare the statistical difference.
  
  
  RESULTS
  After 1 week, calcium hydroxide with distilled water and RC Cal raised the pH to 12.7 and 11.8, respectively, while a small change was observed for Metapex, calcium hydroxide gutta-percha points. The calcium released after 1 week was 15.36 mg/dL from RC Cal, followed by 13.04, 1.296, 3.064 mg/dL from calcium hydroxide with sterile water, Metapex and calcium hydroxide gutta-percha points, respectively.
  
  
  CONCLUSIONS
  Calcium hydroxide with sterile water and RC Cal pastes liberate significantly more calcium and hydroxyl ions and raise the pH higher than Metapex and calcium hydroxidegutta-percha points.
authors.affiliation: Department of Pedodontics and Preventive Dentistry, Sharad Pawar Dental College, Sawangi, Wardha, Mahartashtra, India.
authors.forename: Punit
authors.initials: P
authors.lastname: Fulzele
authors.forename: Sudhindra
authors.initials: S
authors.lastname: Baliga
authors.forename: Nilima
authors.initials: N
authors.lastname: Thosar
authors.forename: Debaprya
authors.initials: D
authors.lastname: Pradhan