title: Sealing ability of three materials in the orifice of root canal systems obturated with gutta-percha.
abstract: There were 130 single roots randomly assigned to one of 12 experimental or two control groups. Forty specimens each were sealed with 1, 2, 3, or 4 mm of Cavit, ProRoot MTA, or Tetric. After creation of a uniform orifice diameter, the smear layer was removed and the canal systems obturated using warm lateral compaction of gutta-percha (GP). GP was removed to the experimental depth, experimental materials placed in the orifice, and roots submerged in India ink in a vacuum flask. Specimens were demineralized and leakage measured using a 10x stereomicroscope and graded for depth of leakage by one calibrated, blinded rater. There was no significant interaction (p > 0.05) between test materials and orifice depths, nor main effect of orifice depth (p > 0.05). However, there was a statistically significant main effect of test materials with Tetric demonstrating a significantly better seal than Pro Root or Cavit (p < 0.0001) irrespective of orifice depth.
authors.affiliation: Department of Endodontics, UMKC School of Dentistry, Kansas City, Missouri 64108, USA.
authors.forename: Stephen
authors.initials: S
authors.lastname: Jenkins
authors.forename: James
authors.initials: J
authors.lastname: Kulild
authors.forename: Karen
authors.initials: K
authors.lastname: Williams
authors.forename: William
authors.initials: W
authors.lastname: Lyons
authors.forename: Charles
authors.initials: C
authors.lastname: Lee
mesh_terms: D017607:Aluminum Compounds; D000704:Analysis of Variance; D017610:Calcium Compounds; D002133:Calcium Sulfate; D003188:Composite Resins; D003738:Dental Cements; D003763:Dental Leakage / Q000517:prevention & control*; D004338:Drug Combinations; D006171:Gutta-Percha; D006801:Humans; D010087:Oxides; D011145:Polyvinyls; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation / Q000379:methods*; D017640:Silicates; D015034:Zinc Oxide
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D003188:Composite Resins; D003738:Dental Cements; D004338:Drug Combinations; D010087:Oxides; D011145:Polyvinyls; D012387:Root Canal Filling Materials; D017640:Silicates; C090969:Tetric; C086631:mineral trioxide aggregate; C020872:Cavit; D006171:Gutta-Percha; D015034:Zinc Oxide; D002133:Calcium Sulfate