title: A laboratory study of glass ionomer cement as a retrograde root-filling material.
abstract: This laboratory study investigated the use of various glass ionomer cements for retrograde root filling from the point of view of sealing qualities, ion release and ease of application. The sealing qualities of the material were tested by dye penetration and microscopic and SEM examination. Fluoride and silver ion release tests showed an initial loss of these two ions from the glass ionomer cement. A modified system for mixing and application was developed. Dye penetration did not differ from that of controls using vertically condensed gutta-percha. Glass ionomer cement is possibly a clinical alternative for the sealing of retrograde cavities; however, the silver-reinforced materials may cause tissue irritation from release of silver ions and their corrosion products.
authors.forename: S
authors.initials: S
authors.lastname: Roth
mesh_terms: D016722:Cermet Cements / Q000737:chemistry; D003763:Dental Leakage / Q000175:diagnosis; D004058:Diffusion; D004801:Eosine Yellowish-(YS); D005459:Fluorides / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006171:Gutta-Percha / Q000737:chemistry; D006801:Humans; D008277:Magnesium Oxide / Q000737:chemistry; D008422:Materials Testing; D011076:Polycarboxylate Cement / Q000737:chemistry; D012184:Retrograde Obturation / Q000379:methods; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012834:Silver / Q000737:chemistry; D013499:Surface Properties; D015034:Zinc Oxide / Q000737:chemistry
chemical_list: D016722:Cermet Cements; D005899:Glass Ionomer Cements; D011076:Polycarboxylate Cement; D012387:Root Canal Filling Materials; C061499:Ketac-Bond; D008277:Magnesium Oxide; D012834:Silver; C040235:Ketac-cem; D006171:Gutta-Percha; D005459:Fluorides; D015034:Zinc Oxide; D004801:Eosine Yellowish-(YS)