title: Sealer distribution in coronal dentin.
abstract: A major cause of tooth discoloration is sealer remnants in the pulp chamber after root canal treatment. The purpose of this study was to assess coronal distribution and color changes of four commonly used sealers placed in the pulp chamber after 2 yr. Fifty extracted premolars were cross-sectioned in the coronal third of the root. The chamber contents were removed, and instrumentation was via the canal; then freshly mixed sealer was placed in each chamber. Sealers evaluated were: AH 26, Kerr Pulp Canal Sealer, Roth 801, and Sealapex. The apical access was sealed with white sticky wax, and the tooth was maintained in a moist environment at 37 degrees C for 2 yr. Teeth were split longitudinally, and digital images of the exposed dentin were made, scrambled, and evaluated blindly by trained evaluators for color changes and for presence of sealer in dentin. There was no measurable penetration of sealer into dentin for all groups and no dentin discoloration occurred. The sealers displayed marked discoloration. At 2 yr, the sealers discolored and remained confined primarily to the pulp chamber.
authors.affiliation: Department of Endodontics, University of Iowa College of Dentistry, Iowa City 52242-1001, USA.
authors.forename: Matthew C
authors.initials: MC
authors.lastname: Davis
authors.forename: Richard E
authors.initials: RE
authors.lastname: Walton
authors.forename: Eric M
authors.initials: EM
authors.lastname: Rivera
mesh_terms: D001729:Bismuth / Q000009:adverse effects / Q000493:pharmacokinetics; D002126:Calcium Hydroxide / Q000009:adverse effects / Q000493:pharmacokinetics; D003804:Dentin / Q000378:metabolism*; D003806:Dentin Permeability; D004338:Drug Combinations; D004853:Epoxy Resins / Q000009:adverse effects / Q000493:pharmacokinetics; D006801:Humans; D011897:Random Allocation; D012387:Root Canal Filling Materials / Q000009:adverse effects* / Q000493:pharmacokinetics*; D012459:Salicylates / Q000009:adverse effects / Q000493:pharmacokinetics; D012834:Silver / Q000009:adverse effects / Q000493:pharmacokinetics; D014025:Titanium / Q000009:adverse effects / Q000493:pharmacokinetics; D019228:Tooth Crown / Q000378:metabolism; D014075:Tooth Discoloration / Q000139:chemically induced*; D015035:Zinc Oxide-Eugenol Cement / Q000009:adverse effects / Q000493:pharmacokinetics
chemical_list: D004338:Drug Combinations; D004853:Epoxy Resins; D012387:Root Canal Filling Materials; D012459:Salicylates; D015035:Zinc Oxide-Eugenol Cement; C055601:Sealapex; D012834:Silver; C028044:epoxy resin AH-26; C074935:Roth's 801 Sealer; C076543:Kerr Pulp Canal Sealer; D014025:Titanium; D002126:Calcium Hydroxide; D001729:Bismuth