title: In vitro release of hydroxyl ions from calcium hydroxide gutta-percha points.
abstract: In endodontic practice, calcium hydroxide is widely used for a number of reasons associated with its high pH. The purpose of the present study was to determine in vitro the alkalizing potential of newly introduced calcium hydroxide gutta-percha points that are proposed for temporary filling of root canals. The materials tested were: calcium hydroxide gutta-percha points; chemical pure calcium hydroxide powder mixed with distilled water; and Reogan rapid, a nonsetting calcium hydroxide preparation. The materials were placed into dialysis tubing and transferred into plastic vials containing bidistilled water. Measurements were taken by a digital pH meter after 10, 20, and 30 s; 1, 15, and 30 min; and 1, 2, 3, 24, 48, 72, 96, and 120 h. The calcium hydroxide containing gutta-percha points showed a significantly lower alkalizing potential than Reogan rapid and calcium hydroxide mixed with distilled water (p < 0.05).
authors.affiliation: Department of Endodontology, Dental School, Aristotle University Thessaloniki, Greece.
authors.forename: N
authors.initials: N
authors.lastname: Economides
authors.forename: E A
authors.initials: EA
authors.lastname: Koulaouzidou
authors.forename: P
authors.initials: P
authors.lastname: Beltes
authors.forename: A H
authors.initials: AH
authors.lastname: Kortsaris
mesh_terms: D000704:Analysis of Variance; D002126:Calcium Hydroxide / Q000737:chemistry*; D006171:Gutta-Percha / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D017665:Hydroxyl Radical; D008422:Materials Testing; D012387:Root Canal Filling Materials / Q000737:chemistry*
chemical_list: D012387:Root Canal Filling Materials; D017665:Hydroxyl Radical; D006171:Gutta-Percha; D002126:Calcium Hydroxide