title: Physical and chemical properties of chlorhexidine and calcium hydroxide-containing medications.
abstract: This study was performed to evaluate the physicochemical properties (pH, contact angle, working time, radio-opacity, and viscosity) of chlorhexidine (CHX) and calcium hydroxide-containing medications in gel form in different concentrations. The pH value was assessed with a pH meter. The contact angle was measured with a goniometer. The radio-opacity and working time measurements were taken in accordance with the standards of the International Organization for Standardization. The viscosity was evaluated using a Brookfield RVDV viscometer. The results showed that CHX did not affect the pH, radio-opacity, and working time of the calcium hydroxide-containing medications (p < 0.05). However, adding CHX lowered the contact angle and increased the viscosity of calcium hydroxide significantly. This research showed that CHX in different concentrations and in combination with calcium hydroxide has satisfactory physicochemical properties to be used as an intracanal medication.
authors.affiliation: Division of Endodontics, Department of Dental Clinical Sciences, Dalhousie University, 5981 University Avenue #5176, Halifax, Nova Scotia, Canada B3H 3J5. bettina.basrani@dal.ca
authors.forename: Bettina
authors.initials: B
authors.lastname: Basrani
authors.forename: Amyl
authors.initials: A
authors.lastname: Ghanem
authors.forename: Leo
authors.initials: L
authors.lastname: Tjäderhane
mesh_terms: D002126:Calcium Hydroxide / Q000737:chemistry*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002710:Chlorhexidine / Q000737:chemistry*; D003287:Contrast Media; D004202:Disinfectants / Q000737:chemistry*; D004338:Drug Combinations; D005782:Gels; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D012388:Root Canal Irrigants / Q000737:chemistry*; D013314:Stress, Mechanical; D013997:Time Factors; D014783:Viscosity; D017155:Wettability
chemical_list: D003287:Contrast Media; D004202:Disinfectants; D004338:Drug Combinations; D005782:Gels; D012388:Root Canal Irrigants; D002126:Calcium Hydroxide; D002710:Chlorhexidine