Effect of four vehicles on the pH of calcium hydroxide and the release of calcium ion.
Nonsetting calcium hydroxide pastes are commonly used in endodontic practice. The desired therapeutic effect of such a paste is in part dependent on the dissociation of calcium hydroxide into hydroxy ion and calcium ion. This in turn is influenced by the vehicle used to make the paste. This investigation attempts to quantitatively estimate the release of hydroxyl ion and calcium ion from pastes made by using distilled water, normal saline solution, camphorated monochlorophenol and also an experimental vehicle, propylene glycol. The results of this study indicate that propylene glycol induces the most favorable release characteristics of the two ionic species.
Simon
S T
ST
Department of Conservative Dentistry and Endodontics, College of Dental Surgery, Manipal Academy of Higher Education, Karnataka, India.
Bhat
K S
KS
Francis
R
R
D002118:Calcium / Q000032:analysis; D002126:Calcium Hydroxide / Q000737:chemistry*; D002164:Camphor / Q000737:chemistry; D002733:Chlorophenols / Q000737:chemistry; D004338:Drug Combinations; D006801:Humans; D006863:Hydrogen-Ion Concentration; D017665:Hydroxyl Radical / Q000032:analysis; D017736:Ion-Selective Electrodes; D007477:Ions; D014677:Pharmaceutical Vehicles; D019946:Propylene Glycol; D011409:Propylene Glycols / Q000737:chemistry; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012965:Sodium Chloride / Q000737:chemistry; D014867:Water / Q000737:chemistry
D002733:Chlorophenols; D004338:Drug Combinations; D007477:Ions; D014677:Pharmaceutical Vehicles; D011409:Propylene Glycols; D012387:Root Canal Filling Materials; D014867:Water; D017665:Hydroxyl Radical; D012965:Sodium Chloride; D019946:Propylene Glycol; D002164:Camphor; C029804:camphorated parachlorophenol; D002126:Calcium Hydroxide; D002118:Calcium