title: Sealing ability of Dyract, Geristore, IRM, and super-EBA as root-end filling materials.
abstract: The purpose of this study was to evaluate the apical sealing ability of two compomers (Dyract and Geristore), IRM, and Super-EBA. Forty single canal roots from human teeth were instrumented until a size 40 file extended 1 mm beyond the apex. One millimeter of root apex was removed and a preparation 3-mm deep was prepared. Roots were divided into 4 groups of 10 roots each and filled with IRM, Super-EBA, Dyract, or Geristore. Canals were not obturated to ensure that any leakage was due to the apical filling material alone. Each root was then affixed to a fluid filtration device and subjected to a pressure of 14 cm of H2O, which has been determined to be the normal pulpal tissue pressure. The integrity of the seal was evaluated for 5 min at 1, 7, 30, and 180 days. Data were analyzed at each time point using one-way analysis of variance on ranks. The results of this study suggest that the new compomers Dyract and Geristore are equal or superior to IRM and equivalent to Super-EBA in their ability to reduce apical leakage when used as retrofilling materials.
authors.affiliation: US Army Dental Activity, Fort Gordon, GA 30905, USA.
authors.forename: B D
authors.initials: BD
authors.lastname: Greer
authors.forename: L A
authors.initials: LA
authors.lastname: West
authors.forename: F R
authors.initials: FR
authors.lastname: Liewehr
authors.forename: D H
authors.initials: DH
authors.lastname: Pashley
mesh_terms: D000704:Analysis of Variance; D001047:Apicoectomy; D020770:Compomers / Q000737:chemistry*; D001840:Dental Bonding; D003763:Dental Leakage / Q000145:classification; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D005374:Filtration; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D008689:Methacrylates / Q000737:chemistry*; D008768:Methylmethacrylates / Q000737:chemistry*; D011312:Pressure; D012117:Resins, Synthetic / Q000737:chemistry*; D012184:Retrograde Obturation; D012387:Root Canal Filling Materials / Q000737:chemistry*; D018915:Root Canal Preparation; D017640:Silicates / Q000737:chemistry*; D013223:Statistics as Topic; D013499:Surface Properties; D013997:Time Factors; D015035:Zinc Oxide-Eugenol Cement / Q000737:chemistry*
chemical_list: D020770:Compomers; D017220:Dentin-Bonding Agents; C088486:Dyract; C074933:Geristore; D005899:Glass Ionomer Cements; D008689:Methacrylates; D008768:Methylmethacrylates; D012117:Resins, Synthetic; D012387:Root Canal Filling Materials; D017640:Silicates; D015035:Zinc Oxide-Eugenol Cement; C031667:IRM cement; C084074:Super EBA