title: Comparison of the sealing ability of mineral trioxide aggregate and Portland cement used as root-end filling materials.
abstract: Inadequate apical seal is the major cause of surgical endodontic failure. The root-end filling material used should prevent egress of potential contaminants into periapical tissue. The purpose of this study was to compare the sealing ability of four root-end filling materials: white mineral trioxide aggregate (MTA), gray MTA, white Portland cement (PC) and gray PC by dye leakage test. Ninety-six human single-rooted teeth were instrumented, and obturated with gutta-percha. After resecting the apex, an apical cavity was prepared. The teeth were randomly divided into four experimental groups (A: white MTA, B: gray MTA, C: white PC and D: gray PC; n = 20) and two control groups (positive and negative control groups; n = 8). Root-end cavities in the experimental groups were filled with the experimental materials. The teeth were exposed to Indian ink for 72 hours. The extent of dye penetration was measured with a stereomicroscope at 16× magnification. The negative controls showed no dye penetration and dye penetration was seen in the entire root-end cavity of positive controls. However, there was no statistically significant difference among the four experimental groups (P > 0.05). All retrograde filling materials tested in this study showed the same microleakage in vitro. Given the low cost and apparently similar sealing ability of PC, PC could be considered as a substitute for MTA as a root-end filling material.
authors.affiliation: Department of Endodontics, Dental Faculty, Tabriz University (Medical Sciences), Tabriz, Iran.
authors.forename: Shahriar
authors.initials: S
authors.lastname: Shahi
authors.forename: Hamid R
authors.initials: HR
authors.lastname: Yavari
authors.forename: Saeed
authors.initials: S
authors.lastname: Rahimi
authors.forename: Mahsa
authors.initials: M
authors.lastname: Eskandarinezhad
authors.forename: Sahar
authors.initials: S
authors.lastname: Shakouei
authors.forename: Mahsa
authors.initials: M
authors.lastname: Unchi
mesh_terms: D017607:Aluminum Compounds; D000704:Analysis of Variance; D017610:Calcium Compounds; D003287:Contrast Media; D003738:Dental Cements; D003763:Dental Leakage / Q000517:prevention & control*; D004338:Drug Combinations; D006801:Humans; D008422:Materials Testing; D010087:Oxides; D012184:Retrograde Obturation / Q000379:methods*; D012387:Root Canal Filling Materials; D017640:Silicates; D018709:Statistics, Nonparametric
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D003287:Contrast Media; D003738:Dental Cements; D004338:Drug Combinations; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C472247:accelerated Portland cement; C086631:mineral trioxide aggregate