title: pH changes in root dentin after root canal dressing with gutta-percha points containing calcium hydroxide.
abstract: Alkalinizing action on root dentin was investigated by treating the enlarged root canals of a total of 120 extracted teeth for 24 h, 3 days, or 7 days with either gutta-percha points (size 40) containing calcium hydroxide or an equivalent quantity of aqueous calcium hydroxide suspension. After splitting the teeth longitudinally the pH of the dentin was determined using a pH microelectrode in small cavities at each of four set measuring points. The gutta-percha points were unable to alkalinize the root dentin over a period of 7 days. Clear, rapid, and prolonged alkalinization of the dentin extending through to the root surface was achieved, however, with the aqueous calcium hydroxide suspension.
authors.affiliation: Poliklinik für Zahnerhaltung, Münster, Germany.
authors.forename: E
authors.initials: E
authors.lastname: Schäfer
authors.forename: A
authors.initials: A
authors.lastname: Al Behaissi
mesh_terms: D000468:Alkalies / Q000008:administration & dosage / Q000627:therapeutic use; D000704:Analysis of Variance; D000891:Anti-Infective Agents, Local / Q000008:administration & dosage / Q000627:therapeutic use*; D002126:Calcium Hydroxide / Q000008:administration & dosage / Q000627:therapeutic use*; D003804:Dentin / Q000503:physiopathology*; D006171:Gutta-Percha / Q000627:therapeutic use*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008839:Microelectrodes; D012387:Root Canal Filling Materials / Q000627:therapeutic use*; D018915:Root Canal Preparation; D013535:Suspensions; D013997:Time Factors; D014092:Tooth Root / Q000503:physiopathology*; D014867:Water
chemical_list: D000468:Alkalies; D000891:Anti-Infective Agents, Local; D012387:Root Canal Filling Materials; D013535:Suspensions; D014867:Water; D006171:Gutta-Percha; D002126:Calcium Hydroxide